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NATIONAL SEMICONDUCTOR LMX9820A Bluetooth Serial Port Module Manual

1. 213 01 121 01 92 00 53 00 64 00 www national com Figure 27 Typical Reflow Profiles 40 Revision 1 0 16 0 Physical Dimensions continued 16 0 Physical Dimensions 1 TYP a 05 l a 0 025 TYP 140 025 TYP OO an GOOOOSOGOSOOOO 2 QOOOO OOOOOOO S ALA 0 3310 05 0 6120 05 TYP 2 MAX EXPOSED 1 0 PADS 0 98 TYP DIMENSIONS ARE IN MILLIMETER dd y DIMENSIONS IN FOR REFERENCE ONLY SB116B Rev B NOTES PAD PITCH IS 1 00 MILLIMETER 0394 NON ACCUMULATIVE UNLESS OTHERWISE SPECIFIED ALL DIMENSIONS ARE IN MILLIMETER TOLERANCE UNLESS OTHERWISE SPECIFIED TWO PLACE 00 01 THREE PLACE 000 002 ANGULAR 1 Figure 28 FR4 Package Revision 1 0 41 www national com SINPON HOd 81195 U 0019nIg VOZ86XINT 17 0 Datasheet Revision History continued stages definitions of the datasheet Table 43 lists the revi sion history and Table 44 lists the specific edits to create 17 0 Datasheet Revision History LMX9820A Bluetooth Serial Port Module This section is a report of the revision creation process of the current revision the datasheet for the LMX9820A Table 42 provides the Table 42 Documentation Status Definitions Datasheet Status Product Status Definition Advance Information This datasheet contains the design specifications for product de velopment Specifications may change in any manner without no ti
2. PM4 SPP Link 12 MHz PM5 SPP Link 12 MHz 11 2 UART TRANSPORT LAYER CONTROL 11 2 1 Hardware Wake Up Functionality In some circumstances the host may switch off the trans port layer of the LMX9820A to reduce power consumption The host and LMX9820A then may shut down their UART interfaces To simplify the system design the UART interface is con figured for hardware wake up functionality For a detailed timing and command functionality see the LMX9820A Software Users Guide The interface between the host and LMX9820A is shown in Figure 17 www national com 26 LMX9820A Host_WU optional Figure 17 UART Null Modem Connections 11 2 2 Disabling the UART Transport Layer The host can disable the UART transport layer by sending the Disable Transport Layer Command The LMX9820A will empty its buffers send the confirmation event and dis able its UART interface The UART interface will then be reconfigured to wake up the LMX9820A on a falling edge of the CTS pin 11 2 3 LMX9820A Enabling the UART Interface Because the transport layer can be disabled in any situa tion the LMX9820A must verify that the transport layer is enabled before sending data to the host Possible situa tions in which the LMX9820A will need to re enable the interface include incoming data or incoming link indicators If the UART is not enabled the LMX9820A must assume that the host is in a low power mode
3. www national com SINPOIN HOd 81195 u0019nIg VOZ86XIWT LMX9820A Bluetooth Serial Port Module 8 0 Digital Smart Radio continued pendent of input waveform duty cycle or amplitude varia tions Loop lockup occurs when all the negative transitions on the inputs F_REF and F_MOD coincide Both outputs i e Up and Down then remain high This is equal to the zero error mode The phase frequency detector input fre quency range operates at 12 MHz 8 6 TRANSMITTER CIRCUITRY The transmitter consists of ROM tables two Digital to Ana log DA converters two low pass filters IQ mixers and a power amplifier PA The ROM tables generate a digital IQ signal based on the transmit data The output of the ROM tables is inserted into IQ DA converters and filtered through two low pass filters The two signal components are mixed up to 2 5 GHz by the TX mixers and added together before being inserted into the transmit PA 8 6 1 1Q DA Converters and TX Mixers The ROM output signals drive an l and Q DA converter Two Butterworth low pass filters filter the DA output signals The 6 MHz clock for the DA converters and the logic circuit ry around the ROM tables are derived from the autotuner The TX mixers mix the balanced I and Q signals up to 2 4 2 5 GHz The output signals of the l and Q mixers are summed 8 7 CRYSTAL REQUIREMENTS The LMX9820A includes a crystal driver circuit This circuit operates with an external crystal
4. z Q Q NC VDD ANA OUT O 0 O O O O ram synch Clock O O O Clk AAI_srd Envi RF_CE_TP11 Q FGND RFGND RFGND RFGND RFGND Uart_rx Uart_rts Uart_tx Uart_ctsit O O O O 7 Z m O Zz y U v J_rdy U Zz U o J_tdi J_tdo O O o Zz o 2 J_tck O RF GND O O 7 o Zz 7 o Zz U RF GND O O O NC VDD_DIG_OUT NC VDD_DIG_PWR_D NC X Ray Top View Figure 2 Connection Diagram Table 1 Ordering Information AAL sis USB_D Dig_gnd_2 USB_Gnd RF GND PI2 TP12 AAI_ std 32kHz_CLKI AAI_sclk USB_VCC PH3_T PH2_TP8 IOVCC ISEL2 CCB_ latch ISEL1 Order Number Shipment Method LMX9820ASM Tape amp Reel 250 pcs LMX9820ASMX Tape amp Reel 2000 pcs www national com Revision 1 0 5 0 Pad Descriptions Table 2 System Interface Signals Pad Name Pad Location Direction Description Clk B8 Input Xtal g or Negative Clock Input Typically connected along with XTAL_D to an external surface mount AT cut crystal Leave not con nected in case Clk is connected to external crystal oscillator Input Xtal d or Positive Clock Input Typically connected along with XTAL_G to an external surface mount AT cut crystal Can also be con figured as a frequency input when using an external crystal oscillator When configured as a frequency input typically
5. Baseband Figure 16 LMX9820A Software Implementation 10 1 FEATURES 10 1 1 Operation Modes On boot up the application configures the module follow ing the parameters in the data area Automatic Mode No Default Connections Stored In Automatic mode the module is connectable and discov erable and automatically answers to service requests The command interpreter listens to commands and links can be set up The full command list is supported If connected by another device the module sends an event back to the host where the RFComm port has been con nected and switches to transparent mode Default Connections Stored If default connections were stored on a previous session after the LMX9820A is reset it will attempt to reconnect to each device stored within the data Flash three times The host will be notified about the success of the link setup via a link status event Command Mode In Command mode the LMX9820A does not check the default connections section within the Data Flash If con www national com 24 nected by another device it will not switch to transparent mode and continue to interpret data sent on the UART Transparent Mode The LMX9820A supports transparent data communication from the UART interface to a Bluetooth link If activated the module does not interpret the commands on the UART which normally are used to configure and control the module In this case the packets do not need to be for
6. CCB_CLOCK CCB_LATCH pa gt gt j LMX9820A 1 a LMX9820A Initialization I I I I L X9820A Oscillator l Start Up I Initialization Standby Active s iy ds Figure 15 LMX9820A System Power Up Sequence Timing gt lt LMX9820A in Power Up Mode LMX9820A in Normal Mode Table 25 LMX9820A System Power up Sequence Timing rails are high The LMX9820A is the properly reset Parameter Condition Min Typ Power to Reset Vcc and lOvcc at operating 2 voltage level to valid reset Revision 1 0 23 www national com SINPOWN HOd 81195 U 0019nIg VOZ86XINT LMX9820A Bluetooth Serial Port Module 10 0 Integrated Firmware continued 10 0 Integrated Firmware The LMX9820A includes the full Bluetooth protocol stack up to RFComm to support the following profiles GAP Generic Access Profile SDAP Service Discovery Application Profile SPP Serial Port Profile Figure 16 shows the Bluetooth protocol stack with com mand interpreter interface The command interpreter offers a number of different commands to support the functional ity given by the different profiles Execution and interface timing is handled by the control application The chip has an internal data area in Flash that includes the parameters shown in Table 26 on page 25 Command Interpreter Control Application SPP SDAP RFComm L2CAP Link Manager
7. 1 Phase Frequency Detector 8 6 TRANSMITTER CIRCUITRY 8 6 1 IQ DA Converters and TX Mixers 8 7 CRYSTAL REQUIREMENTS 8 7 1 Crystal 8 7 2 TCXO Temperature Compensated Crystal Oscil lator 21 8 7 3 ESR Equivalent Series Resistance Revision 1 0 System Power Up Sequence Integrated Firmware 10 1 FEATURES 10 1 1 Operation Modes 10 1 2 Default Connections 10 1 3 Event Filter 10 1 4 Default Link Policy 10 1 5 Audio Support Power Reduction 11 1 LOW POWER MODES 11 2 UART TRANSPORT LAYER CONTROL 11 2 1 Hardware Wake Up Functionality 11 2 2 Disabling the UART Transport Layer 11 2 3 LMX9820A Enabling the UART Interface 11 2 4 Enabling the UART Transport Layer from Host 26 Command Interface 121 FRAMING 12 1 1 Start and End Delimiters 12 1 2 Packet Type ID 12 1 3 Opcode 12 1 4 Data Length 12 1 5 Checksum 12 2 COMMAND SET OVERVIEW Usage Scenarios 13 1 SCENARIO 1 POINT TO POINT CONNECTION 32 13 2 SCENARIO 2 AUTOMATIC POINT TO POINT CONNECTION 33 13 3 SCENARIO 3 POINT TO MULTIPOINT CONNECTION 34 Application Information 14 1 MATCHING NETWORK 14 2 FILTERED POWER SUPPLY 14 3 HOST INTERFACE 14 4 CLOCK INPUT 14 5 SCHEMATIC AND LAYOUT EXAMPLES Soldering Physical Dimensions Datasheet Revision History www national com SINPOIN HOd 81195 u0019nIg VOZ86XIWT LMX9820A Bluetooth Serial Port Module 4 0 Connection Diag 9000000000009 0990000 Q O NC RFGND R O 0 7 Z O O O O O o Zz tz
8. 25 Signal Plane Layer 3 37 www national com SINPOIN HOd 81195 u0019nIg VOCSEXINT LMX9820A Bluetooth Serial Port Module 14 0 Application Information continued e e o Figure 26 Component Layout Bottom Layer 4 www national com 38 Revision 1 0 15 0 Soldering Continued 15 0 Soldering The LMX9820A bumps are designed to melt as part of the Surface Mount Assembly SMA process The LMX9820A is assembled with a high temperature solder alloy to ensure there are no re reflow conditions imposed upon the module when reflowed to a PCB with these typical low tem perature 60 40 S 183 C L 188 C 62 36 2 E 179 C or 63 37 E 183 C solder alloys Where e S Solidus Denotes the points in a phase diagram representing the temperature at which the solder composition be gins to melt during heating or complete freezing dur ing cooling e L Liquidus Denotes the points in a phase diagram representing the temperature at which the solder has molten com ponents The temperature that melting starts at E Eutectic Denotes solid to liquid without a plastic phase The low temperature solder alloy will reflow with the solder bump and provide the maximum allowable solder joint reli ability Reflow at a peak of 215 gt 220 C approximately 30 sec onds at peak Do not to exceed 220 C measured in close proximity of the modules to avoid any potential re reflow condi
9. Request to Send 1 Uart cts D10 Input UART Host Control Interface Transport Clear to Send 2 1 Treat as no connect if not used Pad required for mechanical stability 2 Connect GND if not used Revision 1 0 5 www national com SINPOIN HOd 81195 u0019nIg VOZ86XNT LMX9820A Bluetooth Serial Port Module 5 0 Pad Descriptions continued Table 5 Auxiliary Ports Interface Signals Pad Location Direction Description Pad Name IOVCC H12 Input 2 85V to 3 6V Logic Threshold Program Input Reset b G8 Input Reset for Smart Radio Connect to Reset_5100 Reset_5100 D11 Input Reset for Baseband processor Low active either connect to host or use pull up with max 1KQ resistor Lstat_0 E8 Output Link Status Bit 0 Lstat_1 F8 Output Link Status Bit 1 Host_wu F9 Output Host Wakeup Env0 E9 Input Module Operating Environment Bit 0 Envi Input Module Operating Environment Bit 1 TX_Switch_P H3 Output Transceiver Status 0 Receive 1 Transmit Table 6 Audio Port Interface Signals Pad Pad Name Location Direction Description AAI_srd B10 Input Advanced Audio Interface Receive Data Input 4 AAI_std B12 Output Advanced Audio Interface Transmit Data Output l AAI sis C11 Input Output Advanced Audio Interface Frame Synchronization AAI_sclk C12 Input Output Advanced Audio Interface Clock 1 1 Treat as
10. Semiconductor Austin Board rev1 0b reference cation rev 0 92 design platform All tests are measured at antenna port unless otherwise specified Table 14 Receiver Performance Characteristics Symbol Parameter Condition Min AX cance Receive Sensitivity BER lt 0 001 2 402 GHz 2 441 GHz 2 480 GHz Maximum Input Level Carrier to Interferer Ratio in AFacj 1 MHz the Presence of Adjacent P nRF 60 dBm Channel Interferer BER lt 0 001 AFAci 2 MHz P nRF 60 dBm BER lt 0 001 AFaci 3 MHz Pi RF 67 dBm BER lt 0 001 C limagE 1MHz Carrier to Interferer Ratio in Af 3 MHz the Presence of Image 1MHz PinRF 67 dBm Interferer BER lt 0 001 IMP3 4 Intermodulation Performance Fy 3 MHz Fo 6 MHz PinRF 64 dBm RSSI RSSI Dynamic Range at LNA Input ZRFIN Input Impedance of RF Port Single input impedance RF_inout Fin 2 45 GHz Return Loss Return Loss OOB3 Out Of Band Blocking Pi RF 10 dBm Performance 30 MHz lt Fam lt 2 GHz BER lt 0 001 PinRF 27 dBm 2000 MHz lt Foy lt 2399 MHz BER lt 0 001 PinRF 27 dBm 2498 MHz lt Foy lt 3000 MHz BER lt 0 001 P RF 10 dBm 3000 MHz lt Fowl lt 12 75 GHz BER lt 0 001 Typical operating conditions are at 2 85V operating voltage and 25 C ambient temperature The receiver sensitivity is measured at the device interf
11. and capacitors to form an oscillator Figure 10 shows the recommended crystal circuit Table 24 on page 22 specifies system clock requirements The RF local oscillator and internal digital clocks for the LMX9820A are derived from the reference clock at the CLK input This reference may either come from an exter nal clock or a dedicated crystal oscillator The crystal oscil lator connections require a crystal and two grounded capacitors It is important to consider board and design dependent capacitance in tuning the crystal circuit The following equations allow a close approximation of the required crys tal tuning capacitance but the actual values will vary with the capacitive properties of the board As a result there is some fine tuning of the crystal circuit which cannot be cal culated but must be determined experimentally by testing different values of load capacitance Many different crystals can be used with the LMX9820A A key requirement from the Bluetooth specification is 20 ppm Additionally ESR Equivalent Series Resistance must be carefully considered LMX9820A can support a maximum of 2302 ESR but it is recommended to stay lt 1002 ESR for best performance over voltage and tempera ture See Figure 14 on page 22 for ESR as part of the crys tal circuit for more information 8 7 1 Crystal The crystal appears inductive near its resonant frequency It forms a resonant circuit with its load capacitors The res w
12. and initiate a wake up event by asserting RTS and setting HOST_WU to 1 To be able to respond to the wake up event the host must moni tor its CTS input i e the LMX9820A RTS output As soon as the host activates its RTS output i e the LMX9820A CTS input the LMX9820A will first send a con firmation event and then start to transmit the events 11 2 4 Enabling the UART Transport Layer from Host If the host needs to send data or commands to the LMX9820A while the UART transport layer is disabled it must first assume that the LMX9820A is sleeping and wake it up by asserting the host RTS output i e the LMX9820A CTS input When the LMX9820A detects the wake up signal it enables the UART and acknowledges the wake up signal by asserting its RTS output and HOST_WU signal Addi tionally the wake up event will be acknowledged by send ing a confirmation event When the host has received this Transport Layer Enabled event it knows the LMX9820A is ready to receive commands Revision 1 0 12 0 Command Interface continued 12 0 Command Interface The LMX9820A offers Bluetooth functionality through either a self contained slave functionality or a simple com mand interface The interface is carried over the UART interface The following sections describe the protocol on the UART interface between the LMX9820A and the host in com mand mode see Figure 18 In Transparent mode no data framing is necessary and the device
13. connected to an exter nal Temperature Compensated Crystal Oscillator TCXO through an Alternating Current AC coupling capacitor 32kHz_CLKI Input 32 kHz Clock input Not supported by LMX9820A Connectto ground Pad required for mechanical stability 32kHz_CLKO Output 32 kHz Clock Output Not supported by LMX9820A Treat as no con nect Pad required for mechanical stability RF_inout Input Output RF Antenna Port 502 nominal impedance Typically connected to an antenna through a 6 8 pF capacitor ISEL2 Input Module Interface Select Input Bit 1 ISEL1 Input Module Interface Select Input Bit 0 Table 3 USB Interface Signals not supported by LMX9820A firmware Pad Name Pad Location Direction Description USB_VCC F12 Input USB Transceiver Power Supply USB_D E11 Input Output USB Data Positive USB_D E12 Input Output USB Data Negative USB_Gnd G12 Input USB Transceiver Ground Connect to GND 1 Treat as no connect Pad required for mechanical stability Table 4 UART Interface Signals Pad Name Pad Location Direction Description Uart_tx D9 Output UART Host Control Interface Transport Transmit Data Uart_rx C9 Input UART Host Control Interface Transport Receive Data Uart ris C10 Output UART Host Control Interface Transport
14. does not interpret data carried over the interface as commands 12 1 FRAMING The connection is considered Error free But for packet recognition and synchronization some framing is used All packets sent in both directions are constructed following the model shown in Table 28 12 1 1 Start and End Delimiters The STX character is used as the start delimiter STX 0x02 ETX 0x03 is used as the end delimiter LMX9820A 12 1 2 Packet Type ID This byte identifies the type of packet See Table 29 for details 12 1 3 Opcode The opcode identifies the command to execute The opcode values can be found within the LMX9820A Soft ware User s Guide included with the LMX9820A Evalua tion Board 12 1 4 Data Length Number of bytes in the Packet Data field The maximum size is 333 data bytes per packet 12 1 5 Checksum This is a simple Block Check Character BCC checksum of the bytes Packet type Opcode and Data Length The BCC checksum is calculated as low byte of the sum of all bytes e g if the sum of all bytes is 0x3724 the check sum is 0x24 Existing device without Bluetooth capabilities Figure 18 Bluetooth Functionality Table 28 Packet Framing Start Delimiter Opcode Data Length End Packet Data Delimiter Checksum 1 Byte 1 Byte 1 Byte lt Data Length gt Bytes 1 Byte Table 29 Packet Type Identification Dir
15. the multi input wakeup module UART logic thresholds are set via the IOVCC pin 7 4 AUXILIARY PORTS 7 4 1 Reset_5100 and Reset_b Reset_5100 and Reset_b are active low reset inputs for the baseband controller and digital smart radio portions of the LMX9820A respectively These pins are normally tied together and are connected to the host system so that the host can initialize the LMX9820A by asserting the reset inputs Upon de assertion the status of the module operat ing environment Env pads are sampled and the LMX9820A enters the corresponding operational mode 7 4 2 Operating Environment Pads Env0 and Env1 The module provides two operating environments see Table 17 selected by the states on the Env inputs sampled at reset The ISP mode allows end of line or field programming of the LMX9820A Flash memory by starting the baseband controller from the boot block of memory Table 17 Operating Environments Env1 Env0 Pad B11 Pad E9 ISP Mode 1 0 Operating Environment 7 4 3 Interface Select Inputs ISEL1 ISEL2 The interface selection pads are used for setting the UART speed and settings If ISEL1 and ISEL2 are unconnected they are pulled high by weak internal pullups which select a default baudrate of 921 6k baud The settings for Stop bits Startbit and Parity are stored as internal non volatile storage NVS parameters If a baud rate different from the values listed in Table 18 is needed ISEL 1 a
16. upgrade command can be used 14 4 CLOCK INPUT The clock source must be placed as close as possible to the LMX9820A The quality of the radio performance is directly related to the quality of the clock source connected to the oscillator port on the LMX9820A Careful attention must be paid to the crystal oscillator parameters or radio performance could be drastically reduced 14 5 SCHEMATIC AND LAYOUT EXAMPLES Connect to system vann UART bus Lari ix No HW Flowcontrol CTS GND Uart_cts RTSNC Uart_rts Reference Table 25 on page a for correct POR Reset 5100 timing Reset b Reference Table 17 on page 15 Reference Table 18 on page 15 Capacitor values Ct1 and Ct2 may vary depending on board design crystal manufacturer specification Single ground plane is used for both RF and digital grounds Figure 22 Example System Schematic Revision 1 0 35 www national com SINPOIN HOd 81195 u0019nIg VOZ86XIWT LMX9820A Bluetooth Serial Port Module 14 0 Application Information Continued ERETIERS ELELEE TEES o oe Hi vous Lino K q ini 2121 w wwsesw w Figure 23 Component Placement Layer 1 www national com 36 Revision 1 0 14 0 Application Information Continued Revision 1 0 a CAROD ANBA AKARAN CAGADO INITE III kd ki k a je 890800 oo sanse s Figure 24 Solid Ground Plane Layer 2 t N a 444908 090989709000000808 op Figure
17. 09 2 46409 25EW9 266409 27549 22549 Frequency Hz Figure 7 Front End Bandpass Filter Response www national com 12 Revision 1 0 6 0 Electrical Specifications Continued m2 freq 2 402 GHz S 1 1 0 093 29 733 impedance Z0 1 170 j0 109 m1 freq 2 500 GHz freq 2 400GHz to 2 500GHz S 1 1 0 035 175 614 impedance Z0 0 933 j0 005 Figure 8 TX and RX Pin 502 Impedance Characteristics Revision 1 0 13 www national com SINPOIN HOd 81195 u0019nIg VOCSEXINT LMX9820A Bluetooth Serial Port Module 7 0 Functional Description continued m freq 2 402GHz m5 dB S 1 1 8 282 m3 freq 2 441GHz dB S 1 1 9 313 freq 2 483GHz dB S 1 1 9 227 m5 Figure 9 Transceiver Return Loss 7 0 Functional Description 7 1 BASEBAND AND LINK MANAGEMENT PROCESSORS Baseband and Lower Link control functions are imple mented using a combination of National Semiconductor s CompactRISC 16 bit processor and the Bluetooth Lower Link Controller These processors operate from integrated Flash memory and RAM and execute on board firmware implementing all Bluetooth functions 7 1 1 Bluetooth Lower Link Controller The integrated Bluetooth Lower Link Controller LLC com plies with the Bluetooth Specification version 1 1 and implements the following functions Support for 1 3 and 5 slot packet types 79 channel hop frequency gen
18. Both the post detection filter and equalizer are tuned to the proper fre quency by the autotuning circuitry The post detection filter is a low pass filter intended to suppress all remaining spuri ous signals such as the second harmonic 4 MHz from the FM detector and noise generated after the limiter The post detection filter also helps for attenuating the first adjacent channel signal The equalizer improves the eye opening for 101010 patterns The post detection filter is a third order Butterworth filter 8 4 AUTOTUNING CIRCUITRY The autotuning circuitry is used for tuning the bandpass fil ter detector post detection filter equalizer and transmit fil ters for process and temperature variations The circuitry includes offset compensation for the FM detector 8 5 SYNTHESIZER The synthesizer consists of a phase frequency detector a charge pump a low pass loop filter a programmable fre quency divider a voltage controlled oscillator VCO a del ta sigma modulator and a lookup table The frequency divider consists of a divide by 2 circuit di vides the 5 GHz signal from the VCO down to 2 5 GHz a divide by 8 or 9 divider and a digital modulus control The delta sigma modulator controls the division ratio and also generates an input channel value to the lookup table 8 5 1 Phase Frequency Detector The phase frequency detector is a 5 state phase detector It responds only to transitions hence phase error is inde
19. NT LMX9820A Bluetooth Serial Port Module National does not assume any responsibility for use of any circuitry described no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications For the most current product information visit us at www national com LIFE SUPPORT POLICY NATIONAL S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION As used herein 1 Life support devices or systems are devices or systems which 2 A critical component is any component of a life support device a are intended for surgical implant into the body or b support or system whose failure to perform can be reasonably expected or sustain life and whose failure to perform when properly used to cause the failure of the life support device or system or to af in accordance with instructions for use provided in the labeling fect its safety or effectiveness can be reasonably expected to result in a significant injury to the user BANNED SUBSTANCE COMPLIANCE National Semiconductor certifies that the products and packing materials meet the provisions of the Customer Products Stewardship Specification CSP 9 111C2 and the Banned Substances and Materials of Interest Specification CSP 9 111S2 and contain no Banne
20. National Semiconductor LMX9820A Bluetooth Serial Port Module 1 0 General Description The National Semiconductor LMX9820A Bluetooth Serial Port module is a highly integrated radio baseband control ler and memory device implemented on an FR4 substrate All hardware and firmware is included to provide a com plete solution from antenna from the complete lower and upper layers of the Bluetooth stack up to the application support layers including the Generic Access Profile GAP the Service Discovery Application Profile SDAP and the Serial Port Profile SPP The module includes a config urable service database to fulfill service requests for addi tional profiles on the host The LMX9820A features a small form factor 10 1 x 14 1 x 2 0 mm design which solves many of the challenges associated with compact system integration Moreover the LMX9820A is pre qualified as a Bluetooth Integrated Component Conformance testing through the Bluetooth qualification program enables a fast time to market after system integration by ensuring a high degree of compliance and interoperability APRIL 2005 Revision 1 0 Based on National s CompactRISC 16 bit processor architecture and Digital Smart Radio technology the LMX9820A is optimized to handle the data and link man agement processing requirements of a Bluetooth node The firmware supplied with this device offers a complete Bluetooth v1 1 stack including profiles and command int
21. ORK The antenna matching network may or may not be required depending upon the impedance of the antenna chosen A 6 8 pF blocking capacitor is recommended 14 2 FILTERED POWER SUPPLY It is important to provide the LMX9820A with adequate ground planes and a filtered power supply It is highly rec ommended that a 0 1 uF and a 10 pF bypass capacitor be placed as close as possible to VCC pad H2 on the LMX9820A 14 3 HOST INTERFACE To set the logic thresholds of the LMX9820A to match the host system IOVCC pad H12 must be connected to the logic power supply of the host system It is highly recom mended that a 10 pF bypass capacitor be placed as close as possible to the IOVCC pad on the LMX9820A VCC RF_inout 32kHz_CLKI LMX9820A Connect to PCM codec or leave open AAI_ srd AAL_std AAI_ s s AAI sclk Dig gnd 1 2 D12 G11 Notes ISEL2 pad H13 and ISEL1 pad J13 can be strapped to the host logic O and 1 levels to set the host interface boot up configuration Alternatively both ISEL2 and ISEL1 can be hardwired over 10kQ pullup pulldown resistors Env0 pad E9 and Envi pad B11 can be left uncon nected both are pulled high if no ISP capability is required If the ISP environment mode is needed then Env0 must be driven to logic low and Reset needs to be asserted After de assertion of Reset the LMX9820A boots into the mode corresponding to the values present on Env0 and Env1 Alternatively a firmware
22. R FRONT END The receiver front end consists of a low noise amplifier LNA followed by two mixers and two low pass filters for the l and Q channels The intermediate frequency IF part of the receiver front end consists of two IF amplifiers that receive input signals from the mixers delivering balanced I and Q signals to the poly phase bandpass filter The poly phase bandpass filter is directly followed by two hard limiters that together gener ate an AD converted RSSI signal 8 2 1 Poly Phase Bandpass Filter The purpose of the IF bandpass filter is to reject noise and spurious mainly adjacent channel interference that would otherwise enter the hard limiting stage In addition it han dles image rejection The bandpass filter uses both the l and Q signals from the mixers The out of band suppression should be higher than 40 dB f lt 1 MHz f gt 3 MHz The bandpass filter is tuned over process spread and temperature variations by the au totuner circuitry A 5th order Butterworth filter is used 8 2 2 Hard Limiter and RSSI The l and Q outputs of the bandpass filter are each fol lowed by a hard limiter The hard limiter has its own refer ence current The RSSI Received Signal Strength Indicator reports the level of the RF input signal The RSSI is generated by piece wise linear approximation of the level of the RF signal The RSSI has a mV dB scale and an analog to digital converter for processing by the baseband ci
23. SD free workstations Table 9 Absolute Maximum Ratings LMX9820A Bluetooth Serial Port Module Symbol Parameter Min Max VCC Core Logic Power Supply Voltage 0 3 4 0 IOVCC 1 O Power Supply Voltage 0 3 4 0 USB_vcc USB Power Supply Voltage 0 5 3 63 Voltage on any pad with GND 0V 0 5 3 6 RF Input Power 15 Storage Temperature Range 125 Lead Temperature solder 4 sec 235 ESD HBM ESD Human Body Model 2000 2 ESD MM ESD Machine Model 200 1 USB Interface not supported by LMX9820A firmware Treat as no connect Pad required for mechanical stability 2 Antenna pin passes 1500V HBM Table 10 Recommended Operating Conditions Parameter Min Typ 2 Module Power Supply Voltage 2 85 3 3 1 O Power Supply Voltage 2 85 3 3 Module Power Supply Rise Time Operating Temperature Range HUMop Humidity operating across operating temperature range HUMNonop Humidity non operating 38 7 C web bulb temperature Maximum voltage difference allowed between VCC and IOVCC is 500 mV Typical operating conditions are VCC 3 3V IOVCC 3 3V operating voltage and 25 C ambient temperature VCC internally regulated to VDD_ANA see Table 11 IOVCC internally regulated to VDD_DIG see Table 11 Table 11 Power Supply Electrical Specificatio
24. SPP Link gt gt gt gt ee gt Connected on Port L Link Established Microcontroller No Bluetooth commands necessary only connected event indicated to controller The client software only shows high level functions Figure 19 Point to Point Connection www national com 32 Revision 1 0 13 0 Usage Scenarios Continued 13 2 SCENARIO 2 AUTOMATIC POINT TO POINT CONNECTION LMX9820A at both sides Example Serial Cable Replacement Device 1 controls the link setup with a few commands as described Serial Device 1 1 Devices in Range Inquiry Result 2 Choose the Device Inquiry Result 3 Which COM Port is available Establish SDP Link SDP Link Established RFComm Port R Release SDP Link SDP Link Released 4 Create SPP Link Establish SPP Link to Port R1 on Port L2 Connected on Port L 5 Connect on Default Optional Establish SDP Link SDP Link Established Service Browse Browse Result Release SDP Link SDP Link Released Establish SPP Link to Port R on Port L Link Established Store Default Device 6 Switch to Transparen Transparent Mode Storing Default Device Transparent Mode LMX9820A Microcontroller Bluetooth device controls link with a few commands Air Interface gt lt If step 5 is executed the stored default device is connected step 4 a
25. ace Not tested in production www national com 10 Revision 1 0 6 0 Electrical Specifications Continued 4 The fy 64 dBm Bluetooth modulated signal fy 39 dom sine wave fo 39 dBm Bluetooth modulated signal fy 2f fo and fo fy n x 1 MHz in which n is 3 4 or 5 For the typical case n 3 Table 15 Transmitter Performance Characteristics Symbol Parameter Condition PourRF 2 Transmit Output Power 2 402 GHz 2 441 GHz 2 480 GHz Power Density 5 Power Density MOD AF1 ava Modulation Characteristics Data 00001111 MOD AF2max Modulation Characteristics Data 10101010 AF2 pyc AF1 ave 4 Modulation Characteristics 20 dB Bandwidth ACP 5 Adjacent Channel Power M N 2 In band Spurious IM N gt 3 ae PA 2 Harmonic Maximum gain setting Suppression fo 2402 MHz Pout 4804 MHz Pout2 PouT8 fo PA 3 Harmonic Maximum gain setting Suppression fo 2402 MHz Pout 7206 MHz ZRFOUT RF Output Impedance Input Pout 2 5 GHz Impedance of RF Port RF_inout Return Loss Return Loss 34 Typical operating conditions are at VCC 3 3V IOVCC 3 3V operating voltage and 25 C ambient temperature The output power is measure at the device interface AF2max gt 115 kHz for at least 99 9 of all Af2max Modulation index set between 0 28 and 0 35 Not tested in production Out of Band spurs only exist at 2nd and 3rd h
26. armonics of the CW frequency for each channel Table 16 Synthesizer Performance Characteristics Symbol Parameter Condition Min fvco VCO Frequency Range tLock Lock Time fo 20 kHz us Afgoffset 1 2 Initial Carrier Frequency Tolerance During preamble kHz Afodrift 2 3 Initial Carrier Frequency Drift DH1 data packet kHz DH3 data packet kHz DHS data packet kHz Drift Rate kHz 50us Transmitter Delay Time From Tx data to antenna us Revision 1 0 11 www national com SINPOWN HOd 81195 U 0019nIg VOZ86XINT LMX9820A Bluetooth Serial Port Module 6 0 Electrical Specifications Continued Frequency accuracy is dependent on crystal oscillator chosen The crystal must have a cumulative accuracy of lt 20 ppm to meet Bluetooth specifications Not tested in production Frequency accuracy is dependent on crystal oscillator chosen The crystal must have a cumulative accuracy of lt 20 ppm to meet Bluetooth specifications PERFORMANCE DATA TYPICAL Figure 3 Modulation A Ch Spechum cam Cate ot por 1h O HH Whelan TM ua se mala aur ume Figure 6 Synthesizer Phase Noise Figure 4 Transmit Spectrum Ater haion Loss 216109 22549 2 3
27. bient Temperature 25 C Average values Based on UART Baudrate 115 2kbit s TL Transport Layer 6 2 DC CHARACTERISTICS Table 13 Digital DC Characteristics Parameter Condition Min Max Core Logic Supply Voltage 2 85 3 6 IO Supply Voltage 2 85 3 6 Logical 1 Input Voltage 0 7 x VDD_ANA VDD_ANA 0 5 Logical 0 Input Voltage 0 5 0 2 x VDD_ANA Hysteresis Loop Width 0 1 x VDD_ANA Logical 1 Output Current VDD_ANA 2 8V 1 6 Logical 0 Output Current VDD_ANA 2 8V 1 6 Weak Pull up Current VDD_ANA 2 8V 10 High level Input Current Vin VDD_ANA 2 8V 10 Low level Input Current V 0 10 High Impedance Input Leakage OV lt Vin lt VDD ANA 2 0 Current lo on Output Leakage Current I O pins in 0V Vourt lt VDD DIG 2 0 input mode 1 VCC internally regulated to VDD ANA see Table 11 2 lOVCC internally regulated to VDD DIG see Table 11 3 Guaranteed by design Revision 1 0 9 www national com SINPOWN HOd 81195 U 0019nIg VOZ86XINT LMX9820A Bluetooth Serial Port Module 6 0 Electrical Specifications Continued 6 3 RF PERFORMANCE CHARACTERISTICS e Ta 40 C to 85 C In the performance characteristics tables the following VCC 3 3V IOVCC 3 3V unless otherwise specified applies RF system performance specifications are guaranteed on All tests performed are based on Bluetooth Test Specifi National
28. ce Formative or in Design Preliminary First Production This datasheet contains preliminary data Supplementary data will be published at a later date National Semiconductor Corporation reserves the right to make changes at any time without notice in order to improve design and supply the best possible product S No Identification Noted Full production This datasheet contains final specifications National Semicon ductor Corporation reserves the rightto make changes at any time without notice in order to improve design and supply the best pos sible product Obsolete Not in Production This datasheet contains specifications on a product that has been discontinued by National Semiconductor Corporation The datasheet is printed for reference information only Table 43 Revision History Revision PDF Date Revisions Comments 0 4 April 2003 Initial Datasheet revised to include new radio and additional functionality Several edits have been made to functional performance and electrical details 0 6 February 2004 Updated RF performance values Added 32 kHz frequency support 0 7 August 2004 Updated General Description and Features with Audio Updated Pinout Information Added Audio Section Updated Command Section with audio commands 0 71 August 2004 Reviewed Crystal Support Section Added Audio block to application diagram 0 72 October 2004 Updated pac
29. d Substances as defined in CSP 9 111S2 National Semiconductor National Semiconductor National Semiconductor National Semiconductor Americas Customer Europe Customer Support Center Asia Pacific Customer Japan Customer Support Center Support Center Fax 49 0 180 530 85 86 Support Center Fax 81 3 5639 7507 Email new feedback nsc com Email europe support nsc com Email ap support nsc com Email jon feedback nsc com Tel 1 800 272 9959 Deutsch Tel 49 0 69 9508 6208 Tel 81 3 5639 7560 English Tel 44 0 870 24 0 2171 Francais Tel 33 0 1 41 91 8790 www national com
30. d 1 D12 Input Digital Ground Pad Name Direction Description Dig gnd 2 G11 Input Digital Ground VCC H2 Input 2 85V to 3 6V Input for Internal Power Supply Regula tors VDD ANA OUT J2 Output Voltage Regulator Output Power Supply for Analog Circuitry If not used place pad and do not connect to VCC or Ground VDD_DIG_OUT Output Voltage Regulator Output Power Supply for Digital Circuitry If not used place pad and do not connect to VCC or Ground VDD_DIG_PWR_D Input Power Down for the Internal Power Supply Regulator for the Digital Circuitry Place pad and do not connect to VCC or Ground Connect RF GND Dig_gnd_1 and Dig_gnd_2 to a single ground plane Revision 1 0 7 www national com SINPOIN HOd 81195 u0019nIg VOC8EXINT The following conditions apply unless otherwise stated in the tables below 6 1 GENERAL SPECIFICATIONS Ta 40 C to 85 C Absolute Maximum Ratings see Table 9 indicate limits e VCC 3 3V IOVCC 3 3V beyond which damage to the device may occur Operating Ratings see Table 10 indicate conditions for which the device is intended to be functional 6 0 Electrical Specifications RF system performance specifications are guaranteed on National Semiconductor Austin Board rev1 0b refer This device is a high performance RF integrated circuit and ence design platform is ESD sensitive Handling and assembly of this device should be performed at E
31. ection Description REQUEST REQ A request sent to the Bluetooth module All requests are answered by exactly one confirm Confirm CFM The Bluetooth modules confirm to a request All requests are answered by exactly one confirm Indication IND Information sent from the Bluetooth module that is not a direct confirm to a request Indicating status changes incoming links or unrequested events Response RES An optional response to an indication This is used to respond to some type of indication message Revision 1 0 27 www national com SINPON HOd 81195 U 0019nIg VOZ86XINT LMX9820A Bluetooth Serial Port Module 12 0 Command Interface continued 12 2 COMMAND SET OVERVIEW The LMX9820A has a well defined command set to e Configure the device Hardware settings Local Bluetooth parameters Service database Set up and handle links Tables 30 through 40 show the actual command set and the events coming back from the device A fully docu mented description of the commands can be found in the LMX9820A Software Users Guide Note For standard Bluetooth operation only commands from Table 30 through Table 32 are used Most of the remaining commands are only for configuration purposes Table 30 Device Discovery Commands Command Event Description Inquiry Inquiry Complete Search for devices Device Found Lists BDADDR a
32. eration circuitry Fast frequency hopping at 1600 hops per second Power management control Access code correlation and slot timing recovery 7 1 2 Bluetooth Upper Layer Stack The integrated upper layer stack is prequalified and includes the following protocol layers e L2CAP www national com 14 RFComm e SDP 7 1 3 Profile Support The on chip application of the LMX9820A allows full stand alone operation without any Bluetooth protocol layer nec essary outside the module lt supports the Generic Access Profile GAP the Service Discovery Application Profile SDAP and the Serial Port Profile SPP The on chip profiles can be used as interfaces to additional profiles executed on the host The LMX9820A includes a configurable service database to answer requests with the profiles supported 7 1 4 Application with Command Interface The module supports automatic slave operation eliminating the need for an external control unit The implemented transparent option enables the chip to handle incoming data raw without the need for packaging in a special for mat The device uses a fixed pin to block unallowed con nections Acting as master the application offers a simple but versa tile command interface for standard Bluetooth operations such as inquiry service discovery and serial port connec tion The firmware supports up to three slaves Default Link Policy settings and a specific master mode allow optimized conf
33. erface This firmware features point to point and point to multipoint link management supporting data rates up to the theoretical maximum over RFComm of 704 kbps The internal memory supports up to three active Bluetooth data links and one active SCO link 1 1 APPLICATIONS H Personal Digital Assistants H POS Terminals m Data Logging Systems E Audio Gateway applications 2 0 Functional Block Diagram LINK MGMNT PROCESSOR LMP DIGITAL SMART RADIO BASEBAND CONTROLLER ANTENNA ADVANCED E AAL SF CRYSTAL OSCILLATOR AAL STD spd LS Bas CompactRISC is a trademark of National Semiconductor Corporation UART_RX UART_TX UART_RTS UART_CTS FIRMWARE INCLUDES PROFILES AND COMMAND INTERFACE IOVCG TX_SWITCH_P ENVO ENV1 LSTAT_0 LSTAT_1 HOST_WU RESET_B RESET_5100 COMPACTRISC CORE ISEL1 ISEL2 VOLTAGE ANALOG FI VDD_ANA_OUT VDD_DI P REGULATORS DIGITAL _DIG_OU j VDD_DIG_PWR_D ck VCC DIG GND 1 2 Bluetooth is a registered trademark of Bluetooth SIG Inc and is used under license by National Semiconductor O 2005 National Semiconductor Corporation www national com SINPOIN HOd 81195 u0019nIg VOZ86XIWT LMX9820A Bluetooth Serial Port Module 3 0 Features H Bluetooth version 1 1 qualified H implemented in CMOS technology on FR4 substrate H Temperature Range 40 C to 85 C H FCC certified on LMX9820ADONGLE FCC ID EDILMX9820ASM 3 1 DIGITAL HARDWARE H Baseband a
34. fter reset in automatic mode only or by sending the Connect to Default Device command The command can be sent to the device at any time If step 6 is left out the microcontroller has to use the Send Data command instead of sending data directly to the module Serial Device 2 Inquiry Request Inquiry Response SDP Link Request SDP Link Accept Service Browse Service Response Release SDP Link Release Confirm SPP Link Request SPP Link Accept Connected on Port R Transparent Mode Raw Data Microcontroller LMX9820A No Bluetooth commands necessary only connected event indicated to controller 1 Port R indicates the remote RFComm channel to connect to Usually the result of the SDP request 2 Port L indicates the Local RFComm channel used for that connection Figure 20 Automatic Point to Point Connection Revision 1 0 33 www national com SINPON HOd 81195 4 00 N g VOZ86XINT LMX9820A Bluetooth Serial Port Module 13 0 Usage Scenarios Continued 13 3 SCENARIO 3 POINT TO MULTIPOINT CONNECTION LMX9820A acts as master for several slaves Example Two sensors with LMX9820A one hand held master device with LMX9820A Serial Devices 2 and 3 establish the link automatically as soon as they are contacted by another device No control ler interaction is necessary for setting up the Bluetooth link Both switch automatically into transparent mode The host send
35. iguration for the application specific requirements See also Section Integrated Firmware on page 24 Revision 1 0 7 0 Functional Description continued 7 2 MEMORY The LMX9820A includes 256KB of programmable Flash memory that can be used for code and constant data lt allows single cycle read access from the CPU In addition to storing all algorithms and firmware the on board Flash also contains the IEEE 802 compliant Media Access Con troller MAC address BDADDR The firmware and the BDADDR are programmed by National Semiconductor or can be programmed by the customer either before assem bly into the host system or in system Module firmware can also be updated during manufacturing or in system using the ISP capabilities of the LMX9820A The LMX9820A firmware uses the internal RAM for buffers and program variables 7 3 CONTROL AND TRANSPORT PORT The LMX9820A provides one Universal Asynchronous Receiver Transmitter UART It supports 8 bit data formats with or without parity and one or two stop bits The baud rate is generated by hardware that is programmed at boot time Alternatively the speed and configuration settings can be read out of internal memory settings The UART can operate at baud rates of 2 4k 4 8k 7 2k 9 6k 19 2k 38 4k 57 6k 115 2k 230 4k 460 8k and 921 6k It imple ments flow control logic RTS CTS to provide hardware handshaking capability The UART offers wakeup from the low power modes through
36. ir Get Port Config Get Port Config Confirm Read the actual port settings for a virtual serial port Port Config Changed Notification if port settings were changed from remote device SPP Get Port Status SPP Get Port Status Confirm Returns status of DTR and RTS for the ac tive RFComm link SPP Port Set DTR SPP Port Set DTR Confirm Sets the DTR bit on the specified link SPP Port Set RTS SPP Port Set RTS Confirm Sets the RTS bit on the specified link SPP Port BREAK SPP Port BREAK Indicates that the host has detected a break SPP Port Overrun Error SPP Port Overrun Error Confirm Used to indicate that the host has detected an overrun error SPP Port Parity Error SPP Port Parity Error Confirm Host has detected a parity error SPP Port Framing Error SPP Port Framing Error Confirm Host has detected a framing error SPP Port Status Changed Indicates that remote device has changed one of the port status bits Table 38 Local Settings Commands Command Event Description Read Local Name Read Local Name Confirm Read user friendly name of the device Write Local Name Write Local Name Confirm Set the user friendly name of the device Read Local BDADDR Read Local BDADDR Confirm Change Local BDADDR Change Local BDADDR Confirm Note Only use if you have your own BDADDR pool Store Class of Device St
37. kage size Table 9 to Table 15 updated Optional 32 768 kHz crystal support removed Package outline drawing updated to 14 1mm width and 2 0mm height 0 73 December 2004 In Table 15 maximum output power range updated to 4dBm 0 80 March 2005 Minor edits for clarity language units formatting etc No functional changes 0 81 March 2005 Minor changes in feature list Table 2 updated Added footnote to Table 10 Added description in chapter 6 2 Table 20 updated 0 82 March 2005 Added footnote to Table 13 Figure 22 updated www national com 42 Revision 1 0 17 0 Datasheet Revision History continued Table 43 Revision History Revision PDF Date 1 0 draft 1 March 2005 Updated Power consumption Table 12 1 0 draft 2 April 2005 No functional Update 1 0 draft 3 April 2005 Updated C l in Table 14 1 0 April 2005 No functional Update Revisions Comments Table 44 Edits to current revision Section Revisions Comments General Description Connection Diagram Pad Description Electrical Specifications Functional Description Digital Smart Radio System Power Up Sequence Integrated Firmware Low Power Modes Command Interface Application Information Soldering Physical Dimensions Revision 1 0 43 www national com SINPOWN HOd 81195 YO OJENIg VOZ86XI
38. l Smart Radio continued Figure 12 Frequency Offset with 12 pF 12 pF Capacitors Frequency Deviation Marker 1 Frequency kHz 187 03 Bit Position 0 Marker 2 Frequency kHz 187 03 Bit Position 0 Delta Frequency kHz 0 Bit Position Frequency kHz 60 Bit Position Figure 13 Frequency Offset with 10 pF 10 pF Capacitors Table 23 TCXO NKG3184A Specification Value 8 7 2 TCXO Temperature Compensated Crystal Oscillator The LMX9820A also can operate with an external TCXO Package 5 0 x 3 2 x 1 4 mm 4 pads Temperature Compensated Crystal Oscillator The TCXO signal is directly connected to the CLK shown in Table 23 B ke kil 12 900 MHZ on page 21 Stability 18 ppm at 30 to 85 C 1 Input Impedance inclusive of all conditions The LMX9820A CLK pin has in input impedance of 2 pF Output Load 10kQ 13 pF i i llel with gt 400kQ resi capacitance in parallel with gt 400kQ resistance Current Conaumpuan 2 0 mA 2 NKG3184A TCXO The LMX9820A has also been tested with the NKG3184A Output Level 0 3Vp p to 2 0Vp p TCXO See Table 23 on page 21 Storage Temperature 40 to 85 C DC Cut Capacitor Included in VC TCXO Revision 1 0 21 www national com SINPOIN HOd 81195 u0019nIg VOZ86XNT LMX9820A Bluetooth Serial Port Module 8 0 Digital Smart Radio con
39. matted as described in Table 28 on page 27 Instead all data are directly passed through the firmware to the active Bluetooth link and the remote device Transparent mode can only be supported on a point to point connection To leave Transparent mode the host must send a UART_BREAK signal to the module Force Master Mode In Force Master mode the LMX9820A tries to act like an Access point for multiple connections In this mode it will only accept a link if a master slave role switch is accepted by the connecting device After successful link establish ment the LMX9820A will be master and available for addi tional incoming links On the first incoming link the LMX9820A may switch to transparent mode depending on the setting for automatic or command mode Additional links will only be possible if the device is not in transparent mode 10 1 2 Default Connections The LMX9820A supports the storage of up to 3 default con nections within its NVS Those connections can either be connected after reset or on demand using a specific com mand 10 1 3 Event Filter The LMX9820A uses events or indicators to notify the host about successful commands or changes on the Bluetooth interface Depending on the application the LMX9820A can be configured The following levels are defined No Events the LMX9820A is not reporting any events Optimized for passive cable replacement solutions Standard LMX9820A Events only necessary events
40. nced out of band performance E integrated transmit receive switch full duplex operation via antenna port H Typical 81 dBm input sensitivity H 0 dBm typical output power 3 4 PHYSICAL DIMENSIONS H Compact size 10 1mm x 14 1mm x 2 0mm H Complete system interface provided in Land Grid Array on underside for surface mount assembly H Metal shield included Figure 1 Physical Illustration www national com Revision 1 0 Table of Contents General Description 1 1 APPLICATIONS Functional Block Diagram Features 3 1 3 2 3 3 3 4 Connection Diagram Pad Descriptions Electrical Specifications 6 1 GENERAL SPECIFICATIONS 6 2 DC CHARACTERISTICS 6 3 RF PERFORMANCE CHARACTERISTICS 6 4 PERFORMANCE DATA TYPICAL Functional Description 7 1 BASEBAND AND LINK MANAGEMENT PROCESSORS 14 7 1 1 Bluetooth Lower Link Controller 7 1 2 Bluetooth Upper Layer Stack 7 1 3 Profile Support 7 1 4 Application with Command Interface 7 2 MEMORY 7 3 CONTROL AND TRANSPORT PORT 7 4 AUXILIARY PORTS 7 4 1 Reset_5100 and Reset_b 7 4 2 Operating Environment Pads Env0 and Env1 15 7 4 3 Interface Select Inputs ISEL1 ISEL2 7 4 4 Module and Link Status Outputs 7 5 AUDIO PORT Digital Smart Radio 8 1 FUNCTIONAL DESCRIPTION 8 2 RECEIVER FRONT END 8 2 1 Poly Phase Bandpass Filter 8 2 2 Hard Limiter and RSSI 8 3 RECEIVER BACK END 8 3 1 Frequency Discriminator 8 3 2 Post Detection Filter and Equalizer 8 4 AUTOTUNING CIRCUITRY 8 5 SYNTHESIZER 8 5
41. nd ISEL2 must be pulled low This forces the device to read the UART speed from the parameter table in NVS The default baud rate value programmed in NVS is 9 6k baud however the device firmware can be modified to support other values The default configuration in NVS is 1 Stopbit 1 Startbit and No parity Table 18 shows the ISEL1 and ISEL2 selection settings Table 18 UART Speed Selection ISEL1 ISEL2 Pad J13 Pad H13 Speed baud UART Settings Interface 1 1 921 6k From NVS 0 1 115 2k From NVS 1 9 6k 1Stop 1Start No Parity Check NVS From NVS 7 4 4 Module and Link Status Outputs The LMX9820A provides signals that the host can use to determine the real time status of the radio link The TX_Switch_P signal pad H3 is a real time indication of the current configuration direction of the transceiver The link status lines Lstat 0 and Lstat 1 pads E8 and F8 respectively are GPIO lines controlled by the LMX9820A firmware The Host Wakeup line Host_wu pad F9 is implemented using GPIO and firmware It is used to bring the host processor out of Sleep mode when link activity calls for host processing Host_wu can also be used by the host to check if link activity is present If Host_wu is active then link activity is present and the host loses network awareness if the operating system continues to allow the host processor to enter Sleep mode Table 19 presents the definitions
42. nd Link Management processors H CompactRISC Core H Integrated Memory Flash RAM H UART Command Data Port Support for up to 921 6k baud rate H Auxiliary Host Interface Ports Link Status Transceiver Status Tx or Rx Operating Environment Control Default Bluetooth mode In System Programming ISP mode H Advanced Power Management APM features H Advanced Audio Interface for external PCM codec 3 2 FIRMWARE H Complete Bluetooth Stack including Baseband and Link Manager L2CAP RFCOMM SDP Profiles GAP SDAP SPP H Additional Profile support on host for any SPP based profile like Dial Up Networking DUN Facsimile Profile FAX File Transfer Protocol FTP Object Push Profile OPP Headset HSP Handsfree Profile HFP H On chip application support including Command Interface Link setup and configuration also Multipoint Configuration of the module In System Programming ISP Service database modifications Default connections UART Transparent mode Different Operation modes Automatic mode Command mode 3 3 DIGITAL SMART RADIO H Accepts external clock or crystal input 12MHz 20 ppm cumulative clock error required for Bluetooth H Synthesizer Integrated VCO and loop filter Provides all clocking for radio and baseband func tions H Antenna Port 50 ohms nominal impedance Embedded front end filter for enha
43. nd class of device Remote Device Name Remote Device Name Confirm Get name of remote device Table 31 SDAP Client Commands Command Event Description SDAP Connect SDAP Connect Confirm Create an SDP connection to remote device SDAP Disconnect SDAP Disconnect Confirm Disconnect an active SDAP link Connection Lost Notification for lost SDAP link SDAP Service Browse Service Browse Confirm Get the services of the remote device SDAP Service Search SDAP Attribute Request SDAP Service Search Confirm SDAP Attribute Request Confirm Search a specific service on a remote device Searches for services with specific attributes Table 32 SPP Link Commands Command Event Establish SPP Link Establishing SPP Link Confirm Link Established Incoming Link Description Initiates link establishment to a remote device Link successfully established A remote device established a link to the local device Set Link Timeout Set Link Timeout Confirm Confirms the supervision timeout for the ex isting link Get Link Timeout Get Link Timeout Confirm Get the supervision timeout for the existing link Release SPP Link SPP Send Data Release SPP Link Confirm SPP Send Data Confirm Incoming Data Initiate release of SPP link Send data to specific SPP port Incoming data from remote device Transparent Mode Transparent M
44. no connect if not used Pad required for mechanical stability Table 7 Test Interface Signals Pad Location J_rdy E10 Output JTAG Ready J_tdi F10 Input JTAG Test Data Pad Name Direction Description J_tdo F11 Input Output JTAG Test Data J_tms G9 Input Output JTAG Test Mode Select J tek Input JTAG Test Clock Pli_RFCE_TP11 Test Pin Module Test Point PI2 TP12 Test Pin Module Test Point Tx rx data Test Pin Module Test Point Tx_rx_synch Test Pin Module Test Point CCB_Clock Test Pin Module Test Point CCB_data Test Pin Module Test Point CCB_latch Test Pin Module Test Point BBCLK Test Pin Module Test Point PH3_TP9 Test Pin Module Test Point PH2_TP8 Test Pin Module Test Point www national com 6 Revision 1 0 5 0 Pad Descriptions continued 1 Treat as no connect Pad required for mechanical stability Table 8 Power Ground and No Connect Signals Pad Location A1 A2 A3 A4 A5 No Connect No Connect Pad required for mechanical stability A6 A7 A9 B1 C1 D1 D13 E1 E13 F1 G1 G7 H1 H4 J1 J3 J6 J7 J9 J10 J11 B2 B3 B4 B5 B6 Radio System Ground Must be connected to RF B7 C2 C3 C4 C5 Ground plane Thermal relief required for proper solder C6 C7 D2 D3 D4 ing D5 D6 D7 E2 E3 E4 E5 E6 E7 F2 F3 F4 F5 F6 F7 G2 G3 G4 G5 G6 H5 H6 H7 H9 H10 H11 Dig gn
45. ns Analog and Digital LDOs Symbol Parameter Min Typ 1 Max VDD_ANA_OUT2 Analog Voltage Output Range 28 VDD DIG OUT3 Digital Voltage Output Range 2 5 1 Typical operating conditions are VCC 3 3V IOVCC 3 3V operating voltage and 25 C ambient temperature Values reflect voltages of internally generated regulated voltages VDD ANA and VDD DIG 2 Output of internally generated regulated voltage VDD ANA 3 Output of internally generated regulated voltage VDD_DIG www national com Revision 1 0 6 0 Electrical Specifications Continued Note The voltage regulators are optimized for the internal mance it is highly recommended to have no additional operation of the LMX9820A Because any noise coupled load on their outputs into these supplies can have influence on the radio perfor Table 12 Power Supply Requirements Symbol Parameter Min Typ lcc Tx Power supply current for continuous transmit lcc Rx Power supply current for continuous receive lcc Inq Inquiry IRXSL Receive Data in SPP Link slave 3 4 IRXM Receive Data in SPP Link master 34 lava Active HV3 SCO Audio Link snm Sniff Mode sniff interval 1 second 3 SG TLDIS Scanning no active link TL disabled 3 lidle Idle scanning disabled TL disabled 3 Power supply requirements based on Class Il output power VCC 3 3V IOVCC 3 3V Am
46. ode Confirm Switch to transparent mode on the UART Table 33 Default Connection Commands Command Event Description Connects to either one or all stored default connections Connect Default Connection Connect Default Connection Confirm Store Default Connection Store Default Connection Confirm Store device as default connection Get List of Default Connections List of Default Devices Delete Default Connections Delete Default Connections Confirm www national com 28 Revision 1 0 12 0 Command Interface continued Table 34 Power Mode Commands Command Event Description Set Default Link Policy Set Default Link Policy Confirm Defines the link policy used for any incoming or outgoing link Get Default Link Policy Get Default Link Policy Confirm Returns the stored default link policy Set Link Policy Set Link Policy Confirm Defines the modes allowed for a specific link Get Link Policy Get Link Policy Confirm Returns the actual link policy for the link Enter Sniff Mode Enter Sniff Mode Confirm Exit Sniff Mode Exit Sniff Mode Confirm Enter Park Mode Enter Park Mode Confirm Enter Hold Mode Enter Hold Mode Confirm Power Save Mode Changed Remote device changed the power save mode on the link Table 35 Audio Control Commands Command Event Description Establish SCO Link E
47. of the various module and link status outputs Table 19 Module Link Status Definitions Pad H3 TX_Switch_P At least 1 SPP link es tablished x Run Normal Mode De 1 1 fault Revision 1 0 15 No active SPP link Transceiver Transmit Transceiver Receive Host can Sleep Wakeup host host should not Sleep www national com SINPOIN HOd 81195 u0019nIg8 VOZ86XIWT LMX9820A Bluetooth Serial Port Module 7 0 Functional Description Continued 7 5 AUDIO PORT Advanced Audio Interface The Advanced Audio Interface AAI is an advanced ver sion of the Synchronous Serial Interface SSI that pro vides a full duplex communications port to a variety of industry standard 13 14 15 16 bit linear or 8 bit log PCM codecs DSPs and other serial audio devices The LMX9820A allows the support for one codec The firmware selects the desired audio path and interface con figuration by a parameter stored in NVS The audio path options include the Motorola MC145483 codec the OKI MSM7717 codec through the AAI or no audio Table 20 summarizes the audio path selection and the con figuration of the audio interface at the specific mode Table 20 Audio Path Configuration Audio Path Format AAI Bit Clock AAI Frame Clock AAI Frame Sync Pulse Length Motorola MC145483 13 bit linear 480 kHz 8 kHz 13 bits OKI MSM7717 A law onl
48. ore Class of Device Confirm Set Scan Mode Set Scan Mode Confirm Change mode for discoverability and connectability Set Scan Mode Indication Reports end of automatic limited discoverable mode Get Fixed Pin Get Fixed Pin Confirm Reads current PinCode stored within the device Set Fixed Pin Set Fixed Pin Confirm Set the local PinCode Get Security Mode Get Security Mode Confirm Get actual Security mode Set Security Mode Set Security Mode Confirm Configure Security mode for local device default 2 Remove Pairing Remove Pairing Confirm Remove pairing with a remote device List Paired Devices List of Paired Devices Get list of paired devices stored in the LMX9820A data memory Set Default Link Timeout Set Default Link Timeout Confirm Store default link supervision timeout Get Default Link Timeout Get Default Link Timeout Confirm Get stored default link supervision timeout Force Master Role Force Master Role Confirm Enables Disables the request for master role at incoming connections www national com 30 Revision 1 0 12 0 Command Interface continued Table 39 Local Service Database Configuration Commands Command Event Description Store SPP Record Store SPP Record Confirm Create a new SPP record within the service database Store DUN Record Store DUN Record Confirm Create a new DUN
49. r modes to reduce power in different operating situations The modular structure of the LMX9820A allows the firmware to power down unused modules The low power modes have influence on UART transport layer enables or disables the inter face Bluetooth Baseband activity firmware disables LLC and radio if possible 11 1 LOW POWER MODES The following LMX9820A power modes which depend on the activity level of the UART transport layer and the radio activity are defined The activity of the Bluetooth radio mainly depends on appli cation requirements and is controlled by standard Blue tooth operations such as inquiry page scanning or an active link A remote device establishing or disconnecting a link may also indirectly change the activity level of the radio The UART transport layer by default is enabled on device power up The Disable Transport Layer command is used to disable the transport layer Therefore only the host side command interface can disable the transport layer Enabling the transport layer is controlled by the hardware wake up signalling This can be initiated from either the host or an LMX9820A input See also LMX9820A Soft ware Users Guide for detailed information on timing and implementation requirements Table 27 Power Mode Activity Reference Clock Bluetooth Radio Power Mode UART PMO Off None PM1 Off 12 MHz PM2 Scanning 12 MHz PM3 Scanning 12 MHz
50. rcuit The input RF power is converted to a 5 bit value The RSSI value is then proportional to the input pow er in dBm Revision 1 0 17 The digital output from the ADC is sampled on the BPK TCTL signal low to high transition 8 3 RECEIVER BACK END The hard limiters are followed by two frequency discrimina tors The I frequency discriminator uses the 90 phase shifted signal from the Q path while the Q discriminator uses the 90 phase shifted signal from the I path A poly phase bandpass filter performs the required phase shifting The output signals of the l and Q discriminator are sub tracted and filtered by a low pass filter An equalizer is add ed to improve the eye pattern for 101010 patterns After equalization a dynamic AFC automatic frequency off set compensation circuit and slicer extract the RX_DATA from the analog data pattern The Eb No of the demodulator is approximately 17 dB 8 3 1 Frequency Discriminator The frequency discriminator gets its input signals from the limiter A defined signal level independent of the power supply voltage is needed to obtain the input signal Both in puts of the frequency discriminator have limiting circuits to optimize performance The bandpass filter in the frequency discriminator is tuned by the autotuning circuitry 8 3 2 Post Detection Filter and Equalizer The output signals of the FM discriminator go through a post detection filter followed by an equalizer
51. record within the service database Store FAX Record Store FAX Record Confirm Create a new FAX record within the service database Store OPP Record Store OPP Record Confirm Create a new OPP record within the service database Store FTP Record Store FTP Record Confirm Create a new FTP record within the service database Store IrMCSync Record Store IrMCSync Record Confirm Create anew IrMCSync record within the ser vice database Enable SDP Record Enable SDP Record Confirm Enable or disable SDP records Delete All SDP Records Delete All SDP Records Confirm Ports to Open Ports to Open Confirmed Specify the RFComm Ports to open on startup Table 40 Local Hardware Commands Command Event Description Set Default Audio Settings Set Default Audio Settings Confirm Configure default settings for audio codec and air format stored in NVS Get Default Audio Settings Get Default Audio Settings Confirm Get stored default audio settings Set Event Filter Set Event Filter Confirm Configures the reporting level of the command interface Get Event Filter Get Event Filter Confirm Get the status of the reporting level Read RSSI Read RSSI Confirm Returns an indicator for the incoming signal strength Change UART Speed Change UART Speed Confirm Set specific UART speed needs proper ISEL pin setting Change UART Se
52. s raw data over the UART Serial Device 1 Connect to Device 2 see Scenario 2 Link Established on Port L1 Send Data to Port L1 Data Received from Port L1 Connect to Device 2 see Scenario 2 Connect to Device 3 see Scenario 2 Connect to Device 3 see Scenario 2 Link Established on Port L2 Send Data to Port L2 Data Received from Port L2 Microcontroller LMX9820A LA GUI Lo n Serial Device 1 is acting as master for both devices The host controls which device is sending data using the Send data command If the device receives data from the other devices it is packaged into an Incoming data event The event includes the device related port number If necessary a link configuration can be stored as default in the master Serial Device 1 to enable the automatic recon nect after reset power up or by sending the connect default connection command Serial Device 2 Air Interface Connection Request Connected on Port L Automatic Link Setup Transparent Mode LMX9820A Microcontroller Serial Device 3 Connection Request Connected on Port L Automatic Link Setup Transparent Mode LMX9820A Microcontroller Figure 21 Point to Multipoint Connection www national com Revision 1 0 14 0 Application Information Continued 14 0 Application Information Figure 22 on page 35 represents a typical system sche matic for the LMX9820A 14 1 MATCHING NETW
53. stablish SCO Link Confirm Establish SCO link on existing RFComm link Release SCO Link Release SCO Link Confirm Release SCO link SCO Link Established Indicator A remote device has established a SCO link to the local device SCO Link Released Indicator SCO link has been released Change SCO Packet Type Change SCO Packet Type Confirm Changes packet type for existing SCO link SCO Packet Type changed indicator SCO packet type has been changed Set Audio Settings Set Audio Settings Confirm Set audio settings for existing link Get Audio Settings Get Audio Settings Confirm Get audio settings for existing link Set Volume Set Volume Confirm Configure the volume Get Volume Get Volume Confirm Get current volume setting Mute Mute Confirm Mutes the microphone input Table 36 Wake Up Function Commands Command Event Description Disable Transport Layer Transport Layer Enabled Disabling the UART transport layer and activates the hardware wake up function Revision 1 0 29 www national com SINPON HOd 81195 U 0019nIg VOZ86XINT LMX9820A Bluetooth Serial Port Module 12 0 Command Interface continued Table 37 SPP Port Configuration and Status Commands Command Event Description Set Port Config Set Port Config Confirm Set port setting for the virtual serial port link over the a
54. tal Recommended Circuit Revision 1 0 8 0 Digital Smart Radio continued Revision 1 0 R1 C1 L1 Figure 11 Crystal Equivalent Circuit 19 2 Crystal Pullability Pullability is another important parameter for a crystal which is the change in frequency of a crystal with units of ppm pF either from the natural resonant frequency to a load resonant frequency or from one load resonant fre quency to another The frequency can be pulled in a paral lel resonant circuit by changing the value of load capacitance A decrease in load capacitance causes an increase in frequency and an increase in load capacitance causes a decrease in frequency 3 Frequency Tuning Frequency tuning is achieved by adjusting the crystal load capacitance with external capacitors lt is a Bluetooth requirement that the frequency is always within 20 ppm The crystal network or oscillator must have cumulative accuracy specifications of 15 ppm to provide margin for frequency drift with aging and temperature www national com 9 NPOIN HOd JEI19S YLO0013N Q VOZ86XINT LMX9820A Bluetooth Serial Port Module 8 0 Digital Smart Radio continued TEW Crystal The LMX9820A has been tested with the TEW TAS 4025A crystal see Table 21 on page 20 for specification Because the internal capacitance of the crystal circuit is 8 pF and the load capacitance is 16 pF 12 pF is a good start ing point for both Ct1 and Ct2 The 2480 MHz RF fre quency offset is
55. terface to the host UART Settings 1 Stop bit parity disabled Parity and stop bits on the hardware UART interface Ports to Open 0000 0001 Defines the RFComm ports to open Link Keys No link keys Link keys for paired devices Security Mode 2 Security mode Page Scan Mode Connectable Connectable Not connectable for other devices Inquiry Scan Mode Discoverable Discoverable Not Discoverable Limited Discoverable for other devices Default Link Policy All modes allowed Configures modes allowed for incoming or outgoing connections master slave role switch Hold mode Sniff mode Park mode Default Link Timeout 20 seconds The Default Link Timeout configures the timeout af ter which the link is assumed lost if no packages have been received from the remote device Event Filter Standard LMX9820A events reported Defines the level of reporting on the UART No events Standard events Standard including ACL link events Default Audio Set tings Configures the settings for the external codec and the air interface format Codecs Motorola MC145483 OKI MSM7717 Air format CVSD p Law A Law Revision 1 0 25 www national com 9 NPON HOd 81195 L0019nIg VOCSEXINT LMX9820A Bluetooth Serial Port Module 11 0 Power Reduction Continued 11 0 Power Reduction The LMX9820A supports several low powe
56. then tested Figure 12 on page 21 shows the RF frequency offset test results Figure 12 on page 21 shows the results are 20 kHz off the center frequency which is 1 ppm The pullability of the crystal is 2 ppm pF so the load capacitance must be decreased by about 1 0 pF By changing Ct1 or Ct2 to 10 pF the total load capacitance is decreased by 1 0 pF Figure 13 on page 21 shows the frequency offset test resuts The frequency offset is now zero with Ct1 10 pF Ct2 10 pF Reference Table 22 on page 20 for crystal tuning values used on Austin Development Board with TEW crystal Table 21 TEW TAS 4025A Specification Value Package 4 0 x 2 5 x 0 65 mm 4 pads Frequency 12 000 MHz Mode Fundamental Stability gt 15 ppm 40 to 85 C C Load Capacitance 16 pF ESR 80Q max Cg Shunt Capacitance 5 pF Drive Level 50 10uV Pullability 2 ppm pF min Storage Temperature 40 to 85 C Table 22 TEW on Arizona Board Reference LMX9820A Cti 10 pF Ct2 10 pF Frequency Deviation Frequency kHz www national com 60 Bit Position 20 Marker 1 Frequency kHz 115 45 Bit Position D Marker 2 Frequency kHz 115 45 Bit Position Delta Frequency kHz 0 Bit Position Revision 1 0 8 0 Digita
57. tinued 8 7 3 ESR Equivalent Series Resistance LMX9820A can operate with a wide range of crystals with different ESR ratings Reference Table 24 on page 22 and Figure 14 on page 22 for more details Table 24 System Clock Requirements Parameter Min External Reference Clock Frequency Frequency Tolerance over full operating temperature and aging Crystal Serial Resistance External Reference Clock Power Swing pk to pk Aging Series r for the xtal Xotrim 32 loopgain 2 C1 amp C2 1 5pF 21 5pF traces for different freq Hz 11000000 13000000 15000000 17000000 19000000 zm n 26000000 2 2 2 2 1 1 1 1 1 1 1 1 1 1 30 20 10 00 90 80 70 60 50 40 30 20 10 00 90 80 70 60 50 40 30 20 10 900E 12 1 00E 11 1 10E 11 1206 11 1306 11 1405 11 1506 11 160E 11 1 70E 11 180E 11 1 90E 11 xtal load cap F Figure 14 ESR vs Load Capacitance for the Crystal www national com 22 Revision 1 0 9 0 System Power Up Sequence continued 9 0 System Power Up Sequence The following sequence must be performed to correctly power up the LMX9820A 2 Reset b and Reset_5100 of the LMX9820A are driven high a minimum of 2 ms after the LMX9820A voltage See Table 25 on page 23 1 Apply IOVCC and VCC to the LMX9820A Reset_b Reset_5100 TX_RX_DATA TX_RX_SYNC CCB_DATA
58. tions Table 41 and Figure 27 on page 40 provide the soldering details required to properly solder the LMX9820A to stan dard PCBs The illustration serves only as a guide and National is not liable if a selected profile does not work Table 41 Soldering Details Parameter Value PCB Land Pad Diameter 24 mil PCB Solder Mask Opening 30 mil PCB Finish HASL details 63 37 difference in thickness lt 28 micron Stencil Aperture 28 mil Stencil Thickness 5 mil Solder Paste Used Low temperature 60 40 S 183 C L 188 C 62 36 2 E 179 C or 63 37 E 183 C solder alloys Flux Cleaning Process No Clean Flux System Reflow Profiles See Figure 27 on page 40 1 Typically defined by customer Revision 1 0 39 www national com SINPOWN HOd 81195 YO OJENIg VOZ86XINT LMX9820A Bluetooth Serial Port Module 15 0 Soldering Continued MOLE STATUS Max Internal T 38C Battery 4 637 Points Active 1234 KX Tool status box Speed 33 0 V 3 130 160 vin S r o 150 Zow4 Zon 5 160 L Zone 10 Put HSC micbgabdyd EJbgs lef 9 00 5 00 00 50 Un 55 00 00 52 Profile Time Between 130 C 160 C s Rising Time 130 C s Rising Time 160 C s Time Between 160 C 183 C s Total Time Above 183 C s 208 01 109 00 99 01 57 00 75 00
59. ttings Change UART Settings Confirm Change configuration for parity and stop bits Test Mode Test Mode Confirm Enable Bluetooth EMI test or local loopback Restore Factory Settings Restore Factory Settings Confirm Reset Dongle Ready Soft reset Firmware Upgrade Stops the Bluetooth firmware and executes the in system programming code Revision 1 0 31 www national com 9 NPON HOd 81195 YI0OJENIg VOZ86XIWT 13 0 Usage Scenarios Continued 13 0 Usage Scenarios 13 1 SCENARIO 1 POINT TO POINT CONNECTION The SPP conformance of the LMX9820A allows any device using the SPP to connect to the LMX9820A By switching to transparent mode automatically the con troller has no need for an additional protocol layer data is LMX9820A Bluetooth Serial Port Module AE he other Bluetooth device LMX9820A acts only as slave no further configuration is Sent raw 1o the oiner co H required Example Sensor with LMX9820A hand held device with standard Bluetooth option On default a PinCode is requested to block unallowed tar geting Air Interface Sensor Device Standard Device with Bluetooth Inquiry Request Inquiry Response SDP Link Request Get Remote Services Search for Devices SDP Link Accept Service Browse Service Response Release SDP Link Release Confirm SPP Link Request SPP Link Accept Transparent Mode LMX9820A Establish
60. will be reported All Events additional to the standard all changes at the physical layer will be reported 10 1 4 Default Link Policy Each Bluetooth link can be configured to support mas ter slave role switch Hold mode Sniff mode and Park mode The default link policy defines the standard setting for incoming and outgoing connections 10 1 5 Audio Support The LMX9820A offers commands to establish and release synchronous connections SCO to support Headset or Handsfree applications The firmware supports one active link with all available package types HV1 HV2 HV3 for routing audio data between the Bluetooth link and the advanced audio interface To provide the analog data inter face an external audio codec is required The LMX9820A includes a list of codecs which can be used Revision 1 0 10 0 Integrated Firmware continued Table 26 Operation Parameters Stored in LMX9820A Parameter Default Value Description BDADDR Hardcoded into device Bluetooth device address Local Name Serial port device PinCode 0000 Bluetooth PinCode Operation Mode Automatic Command or Automatic mode Default Connections 0 Up to three default devices to connect on default SDP Database 1 SPP entry Name COM1 Authentication and encryption enabled Service discovery database control for supported profiles UART Speed 9600 Sets the speed of the physical UART in
61. ww national com 18 onant frequency may be trimmed with the crystal load capacitance 1 Load Capacitance For resonance at the correct frequency the crystal should be loaded with its specified load capacitance which is the value of capacitance used in conjunction with the crystal unit Load capacitance is a parameter specified by the crystal typically expressed in pF The crystal circuit shown in Figure 11 on page 19 is composed of C1 motional capacitance R1 motional resistance L1 motional inductance CO static or shunt capacitance The LMX9820A provides some of the load with internal capacitors Cint The remainder must come from the exter nal capacitors and tuning capacitors labeled Ct1 and Ct2 as shown in Figure 10 Ct1 and Ct2 should have the same the value for best noise performance The LMX9820A has an additional internal capacitance Crune Of 2 6 pF Crystal load capacitance C is calculated as CL Cint CTUNE Ct1 Ct2 The C above does not include the crystal internal self capacitance Co as shown in Figure 11 on page 19 so the total capacitance is Ctotal CL Co Based on the crystal specification and equation CL Cint CTUNE Ct1 Ct2 C 8pF 2 6pF 6pF 16 6pF 16 6 pF is very close to the TEW crystal requirement of 16 pF load capacitance With the internal shunt capacitance Ctotal Ciota 16 6pF 5pF 21 6pF LMX9820A Cint Crystal Figure 10 LMX9820A Crys
62. y 8 bit log PCM 120 kHz 8 kHz 14 bits 1 Due to internal clock divider limitations the optimum of 512 kHz 8 kHz cannot be reached The values are set to the best possible values The clock mismatch does nat result in any discernible loss in audio quality www national com 16 Revision 1 0 8 0 Digital Smart Radio continued 8 0 Digital Smart Radio 8 1 FUNCTIONAL DESCRIPTION The integrated Digital Smart Radio uses a heterodyne re ceiver architecture with a low intermediate frequency 2 MHz such that the intermediate frequency filters can be in tegrated on chip The receiver consists of a low noise am plifier LNA followed by two mixers The intermediate frequency signal processing blocks consist of a poly phase bandpass filter BPF two hard limiters LIM a frequency discriminator DET and a post detection filter PDF The received signal level is detected by a received signal strength indicator RSSI The received frequency equals the local oscillator frequen cy fLO plus the intermediate frequency fIF fRF fLO fIF supradyne The radio includes a synthesizer consisting of a phase de tector a charge pump an off chip loop filter an RF fre quency divider and a voltage controlled oscillator VCO The transmitter uses IQ modulation with bit stream data that is gaussian filtered Other blocks included in the trans mitter are a VCO buffer and a power amplifier PA 8 2 RECEIVE

NATIONAL SEMICONDUCTOR LMX9820A Bluetooth Serial Port Module Manual

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