ANALOG DEVICES UG-207 handbook
Contents
1. lv Enable 1 0 Syne Clock Output Pin Enable Matched Latency Auto Clear Phase Accumulator Clear Phase Accumulator 07481 004 Figure 5 Control Window The Control window provides control of the clock input clock trade off Increasing this current output also increases phase multiplier DAC gain settings internal I O update and power noise The default setting of this drop down box is 387 uA down functions of the AD9910 see Figure 5 VCO Range allows you to select the range of operation for the Configuring the Reference Clock Path VCO on the AD9910 The AD9910 evaluation software automati The Clock section allows you to configure the reference clock cally determines which range the AD9910 should operate in path in the AD9910 However if you prefer to run a given frequency in a band other than the one selected by the software a warning box prompts you to confirm this Note that using a VCO frequency outside of its specified range may result in undesired operation including External Clock inputs the operating frequency of the external reference clock or crystal The maximum reference clock frequency of the AD9910 is 1 GHz The default setting is 100 MHz A red nae nonfunctionality See the AD9910 data sheet for more informa outline indicates that the value entered is out of range tion regarding the different VCO bands Enable Multiplier selects the PLL multiplication factor 12x to 127x by which to scale t2. DUT Signals PE r DUT Signals CTL DUT Flags PD T ISFE f REGUD_EN r SCLK PLL Lock ExtPurDwn DRCTL Reset DUT M ORHOLD I Autor Apply RE GUD Apply I OSK s s J P3 Read i Pz Sync Sample Error RAM Sweep Over Digtal Ramp Over RAM LAD Wired Senal 10 Serial Port Status LSB First REG Update wire Mode eats too 1b gt 15 8 Tals 00000000 0000000 00000000 00000000 Ha Ah Hex Hex A Hea J o foo ft 00 Load Reg I Auto REG Update Reg Addr CFR1 00H 07481 013 Figure 15 Debug Window The Debug window gives you complete direct access to the register map as well as control of many external pins The Debug window is intended for debugging issues with the AD9910 It can be used for all programming but is not user friendly this may result in improper programming of reserved bits DUT Signals PA The ISFC ExtPwrDwn Reset DUT I O Reset and CSB check boxes control the pins to which they correspond All of these functions are available elsewhere in the software A check in the box means that the pin is in its active state Note that this does not mean that the pin is logic high or low This is determined by the active state on that pin See the AD9910 data sheet for information about external pins The Flash and USB_Status check boxes are used to control the two LEDs on the AD9910 evaluation board DUT Signals PE The REGUD_EN DRCTL
3. Bistart JD ly MS rccvasaaievavete C zPaken ser 51 409510 Evaluation So eRe 5 Figure 10 Windows Accessed from View Menu Rev A Page 11 of 16 UG 207 OSK AND DIGITAL RAMP CONTROL E OSK amp Digital Ramp Control Enable Digital Ramp Generator gt Ramp Finished Auniary Sources 07481 009 Figure 11 OSK and Digital Ramp Control Window To access the OSK amp Digital Ramp Control window select OSK Digital Ramp Control Window from the View drop down menu Digital Ramp Generator To use the digital ramp generator DRG function of the AD9910 select the Enable Digital Ramp Generator check box Under Mode select the frequency phase or amplitude to be gener ated The Auto Clear Digital Ramp Accum check box allows you to set the clear digital ramp accumulator bit when the I O update signal is applied or when there is a profile change The clear bit is then released The Clear Digital Ramp Accumulator check box allows you to set and keep the digital ramp accumulator cleared until that bit is cleared The Load DRR I O Update box allows you to reload the digital ramp rate when an I O update is issued or when there is a profile change Sweep Frequency 0 and Sweep Frequency 1 are the starting and stopping frequencies of the ramp Note that this is frequency phase or amplitude depending on which ramp generator is selected It is important that the value in the Sweep 0 register is always le
4. DRHOLD REGUD OSK P3 P2 and P1 check boxes control their selected pins REGUD issues an I O update to the device under test DUT whereas REGUD_EN allows the software to control the I O_UPDATE pin P3 P2 UG 207 and P1 control the profile register pins See the AD9910 data sheet for the logic to control the profiles via the external pins DUT Signals CTL The SCLK serial clock pin check box is used to synchronize data to and from the AD9910 and to run the internal state machines This window allows you to toggle the external pin DUT Flags PD The PLL Lock Sync Sample Error RAM Sweep Over and Digital Ramp Over alerts indicate an active state on each of those external pins See the AD9910 data sheet for descriptions of the active state of each pin Serial I O The Serial I O area allows direct access to the register map The Reg Addr drop down box allows you to select the register of interest The bit numbers are shown above each byte in the register The maximum size of any given register is eight bytes For registers that are smaller the unavailable bytes are grayed out You can type the register values in either binary or hexadecimal format The Serial Port Status area displays alerts for the serial operating mode of the AD9910 LSB First or 3 Wire Mode Auto Apply Note that when the Auto Apply check boxes in the DUT Signals PA DUT Signals PE and DUT Signals CTL areas are selected the action is automa
5. Descrip NO oenen E E E l Evaluation Board Block Diagram ssssessssesessssesessssesessssesessesesee l REVIO MHISTE Y orare E 2 Evaltiation B ard HardWare ersan aA 3 Regate nme Seiren aii aie EEE O E E 3 Setting Up the Evaluation Board ssssessssessesssessesssesseresrsseseses 3 CLOTINC CONS creidinn N G 3 TOETS iea AEE EE E T 3 EvaltiatiOne Board Lay t sassa 4 Evaluation Board SOWA Ceneri a A 5 REVISION HISTORY 10 10 Rev 0 to Rev A Document Title Changed from AD9910 PCBZ to UGT aoea Universal Updated Porma loarn n E E Universal Changes to Device Clock Oscillator Options Section 3 Changes to Power Down Digital DAC Clock Input and Aux PAC SCHON anaa a A ante lm ancaatesciannes 8 Chans to DUT TO Section acne aceatincenene nates 16 Deleted Ordering Information Section 0 eeeeeeeteeeeeeeees 17 4 08 Revision 0 Initial Version Installs the S Ol Wane ees tccsios cies ec seiees las a 5 Pris tal laine e DIY E eranen eaveced event E 5 Waiiiehine the ProdraMisasipprenuseye roninas neice 5 CODTOL WINGO Wicsrscinen aa EE 7 Profiles W111 OW nencen aerae erena eoa aera EEA 9 omele Tone Modesa RA 9 VION WINI OW Seeria ea EE E 11 OSK and Digital Ramp Control oe eeeeeeeeeeteeeeeeteeeeeeees 12 Multiehip Syne Contro lycra ar 13 KRAM OD GT SHON arog are ere eee 14 Te ih Sees ccoec casey teen seecaieasicat odetes cans eeeeemaaaceatesecta i maeeenteapertuaare 15 Register Map Software Buffer Values 00 0 cc
6. Matched Latency Auto Clear Phase Accumulator Clear Phase Accumulator eee Profile 2 Output Freq 0 000000000 MHz Phase Difset i f 0 000 Deg Amplitude SF f 0 00000 EEE 209970 0000000000 Phase Offset 7 0 000 Arpitude SF f 000000 M Profile 4 Output Freq o 000000000 MHz Phase Ditset ZZ 0 000 Deg Amplitude SE i f 0 00000 o00000000 Profile amp Output Freg 0 000000000 Phate Offset J 0 000 Ariohtude SF 1 6 00000 Profile 7 Output Freq 0 000000000 Phase Offset 0 000 Amphtude SF fi H 0 00000 Enable Profile ASF Enable Sine Out C Enable RAM Internal Profde Control Figure 4 Example of Window with the Evaluation Software Successfully Loaded Rev A Page 6 of 16 07481 003 07481 016 UG 207 CONTROL WINDOW m Clock Use intemal lO Update 7 r Power Down Extemal Clock ffiag c0000 MHz 1 0 Update Rate Penod T Digitial 2 Divider Disable pps 5 E BAC ie 7 Gece Irnpaat T Enable Multiplier Upd Aus DAC Jia Tm Er N i m i I Enable Auto PD Enable PFD Input Double M des a ee External PD Mode EA backlash Purl Fast Recovery P A rE E Aen Pee j Ci eae Full Power Down a External Power Down Pin FLL Loci Refresh System Clock 50 00000 MHz
7. THE EVALUATION BOARD INCLUDING BUT NOT LIMITED TO LOST PROFITS DELAY COSTS LABOR COSTS OR LOSS OF GOODWILL ADI S TOTAL LIABILITY FROM ANY AND ALL CAUSES SHALL BE LIMITED TO THE AMOUNT OF ONE HUNDRED US DOLLARS 100 00 EXPORT Customer agrees that it will not directly or indirectly export the Evaluation Board to another country and that it will comply with all applicable United States federal laws and regulations relating to exports GOVERNING LAW This Agreement shall be governed by and construed in accordance with the substantive laws of the Commonwealth of Massachusetts excluding conflict of law rules Any legal action regarding this Agreement will be heard in the state or federal courts having jurisdiction in Suffolk County Massachusetts and Customer hereby submits to the personal jurisdiction and venue of such courts The United Nations Convention on Contracts for the International Sale of Goods shall not apply to this Agreement and is expressly disclaimed ahora www analog com Rev A Page 16 of 16 2008 2010 Analog Devices Inc All rights reserved Trademarks and registered trademarks are the property of their respective owners UG07481 0 10 10 A
8. portion of the Evaluation Board to any other party for any reason Upon discontinuation of use of the Evaluation Board or termination of this Agreement Customer agrees to promptly return the Evaluation Board to ADI ADDITIONAL RESTRICTIONS Customer may not disassemble decompile or reverse engineer chips on the Evaluation Board Customer shall inform ADI of any occurred damages or any modifications or alterations it makes to the Evaluation Board including but not limited to soldering or any other activity that affects the material content of the Evaluation Board Modifications to the Evaluation Board must comply with applicable law including but not limited to the ROHS Directive TERMINATION ADI may terminate this Agreement at any time upon giving written notice to Customer Customer agrees to return to ADI the Evaluation Board at that time LIMITATION OF LIABILITY THE EVALUATION BOARD PROVIDED HEREUNDER IS PROVIDED AS IS AND ADI MAKES NO WARRANTIES OR REPRESENTATIONS OF ANY KIND WITH RESPECT TO IT ADI SPECIFICALLY DISCLAIMS ANY REPRESENTATIONS ENDORSEMENTS GUARANTEES OR WARRANTIES EXPRESS OR IMPLIED RELATED TO THE EVALUATION BOARD INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTY OF MERCHANTABILITY TITLE FITNESS FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS IN NO EVENT WILL ADI AND ITS LICENSORS BE LIABLE FOR ANY INCIDENTAL SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES RESULTING FROM CUSTOMER S POSSESSION OR USE OF
9. section corresponds to a different profile RAM Segment 0 corresponds to Profile 0 Use the Beginning Address and Final Address text boxes to set the beginning and ending addresses for the RAM sweep The Address Step Rate sets the 16 bit address step rate value The Mode Control drop down box sets the 3 bit RAM control word mode See the AD9910 data sheet for a complete description of the RAM operating modes The Zero Crossing check box sets the zero crossing bit This bit is effective only in RAM mode using direct switch The No Dwell check box sets the no dwell high bit This bit is only effective when the RAM mode is in ramp up Use the Activate area to switch between profiles Use the Internal Profile Control drop down box to select the internal profile control configurations Refer to the AD9910 data sheet for detailed information on the RAM internal profile control modes Use the RAM Data Type drop down box to select the Rev A Page 14 of 16 C Profe LOAD RAM Segment 6 Beginning Addess o FinalAddess 0 Address Step Rate 0 0000 us Mode Control Drect Switch M ZeroCrossnmg M N RAM Segment 7 Ecgnrmg Address lo FinalAddess 0 Address Step Rate 0 0000 us Mode Control M ZetoCrossing N w F a z Enable Sine Out e noed Enable RAM MA C Profie 2 lntemal Profe Cortot C Piofle3 Inactive x C Profle4 RAM Data Type Profle 5 Polar Phase amp Amplitude C Pro
10. software for external controllers JUMPERS Use the jumper settings listed in Table 3 to enable different modes of communication Table 3 Jumper Settings for Communication Modes Mode Settings PC Control Set Jumper W1 and Jumper W2 to enable Set USB Port Jumper W4 to enable Place a jumper on W5 W6 and W3 External Set Jumper W1and Jumper W2 to disable Set Control Jumper W4 to disable Remove the jumper on W5 W6 and W3 Jumper W1 Jumper W2 and Jumper W4 enable the USB circuitry to control the AD9910 Jumper W3 controls the EEPROM used in starting up the USB circuitry Jumper W5 and Jumper W6 control Signal SDO and Signal SDIO to and from the AD9910 Rev A Page 3 of 16 UG 207 EVALUATION BOARD LAYOUT STATUS PINS MANUAL I O USB PORT CONTROL HEADERS POWER SUPPLY CONNECTIONS MULTIDEVICE CLOCK MODE SYCNHRONOUS CONTROL SELECT OUTPUT ANALOG DEVICES HEEP E55 Sreesibera ME ADA Evaluation dogre d HEV 0 1000 HSF Direct Digital Synthesize f rl BOORTIOFPEBL 2008 my Uta 07481 002 Figure 2 AD9910 PCB Evaluation Board Manual I O Control Headers These pins provide the communication interface for the AD9910 when the part is under the command of an external controller see Table 3 for correct jumper settings Multidevice Synchronous Control These connections set up the AD9910 for multidevice synchronous operation DAC Output These connections represent the filtered or un
11. until you have read and agreed to the Agreement Your use of the Evaluation Board shall signify your acceptance of the Agreement This Agreement is made by and between you Customer and Analog Devices Inc ADI with its principal place of business at One Technology Way Norwood MA 02062 USA Subject to the terms and conditions of the Agreement ADI hereby grants to Customer a free limited personal temporary non exclusive non sublicensable non transferable license to use the Evaluation Board FOR EVALUATION PURPOSES ONLY Customer understands and agrees that the Evaluation Board is provided for the sole and exclusive purpose referenced above and agrees not to use the Evaluation Board for any other purpose Furthermore the license granted is expressly made subject to the following additional limitations Customer shall not i rent lease display sell transfer assign sublicense or distribute the Evaluation Board and ii permit any Third Party to access the Evaluation Board As used herein the term Third Party includes any entity other than ADI Customer their employees affiliates and in house consultants The Evaluation Board is NOT sold to Customer all rights not expressly granted herein including ownership of the Evaluation Board are reserved by ADI CONFIDENTIALITY This Agreement and the Evaluation Board shall all be considered the confidential and proprietary information of ADI Customer may not disclose or transfer any
12. ANALOG DEVICES Evaluation Board User Guide UG 207 One Technology Way P O Box 9106 Norwood MA 02062 9106 U S A Tel 781 329 4700 Fax 781 461 3113 e www analog com Evaluation Board for 1 GSPS DDS with 14 Bit DAC FEATURES Full featured evaluation board for the AD9910 PC evaluation software for control and measurement of the AD9910 USB interface Graphic user interface GUI software with frequency sweep capability for board control and data analysis Factory tested and ready to use PACKAGE CONTENTS AD9910 evaluation board AD9910 PCBZ installation software CD USB cable GENERAL DESCRIPTION This user guide describes how to set up and use the AD9910 evaluation board The AD9910 is a 1 GSPS DDS with a 14 bit DAC The evaluation board software provides a graphical user interface GUI for easy communication with the device along with many user friendly features such as the mouse over effect This user guide is intended for use in conjunction with the AD9910 data sheet which is available from Analog Devices Inc at www analog com EVALUATION BOARD BLOCK DIAGRAM TO PC USB INTERFACE PARALLEL DATA PORT DC POWER HEADER PLEASE SEE THE LAST PAGE FOR AN IMPORTANT Figure 1 MULTICHIP SYNC AD9910 DAC OUT REFERENCE CLOCK 07481 001 WARNING AND LEGAL TERMS AND CONDITIONS Rev A Page 1 of 16 UG 207 TABLE OF CONTENTS Peali eS aeeai 1 Pae HAG CG ONES INS aei E EA l General
13. e I O LSB First drop down menu see Figure 10 The DUT I O window allows you to select the serial I O port configuration Under I O Port Config you can select either 2 Wire or 3 Wire mode Under Data Format you can select MSB First or LSB First See the AD9910 data sheet for more information on these serial port modes The Reset I O Port effectively resets the I O port to fix communication errors This Figure 17 DUT I O Window feature should be used if the part stops responding due to errors 07481 015 in the data sent to the part Resetting the part completely has the same effect but simply resetting the I O port is a more desirable solution ESD Caution ESD electrostatic discharge sensitive device Charged devices and circuit boards can discharge without detection Although this product features patented or proprietary protection Alas circuitry damage may occur on devices subjected to high energy ESD Therefore proper ESD precautions should be taken to avoid performance degradation or loss of functionality Legal Terms and Conditions By using the evaluation board discussed herein together with any tools components documentation or support materials the Evaluation Board you are agreeing to be bound by the terms and conditions set forth below Agreement unless you have purchased the Evaluation Board in which case the Analog Devices Standard Terms and Conditions of Sale shall govern Do not use the Evaluation Board
14. ed onto your PC the next step is to interface the AD9910 evaluation software to the AD9910 evaluation board via the USB Port see Figure 2 In order for the evaluation board and software to communicate properly drivers must be loaded onto your PC system The following instructions explain how to install these drivers on your PC system Windows 98 ME 2000 Users 1 Power up the AD9910 evaluation board see Table 2 2 Connect the evaluation board to the computer using a USB cable via the USB port Then the VBUS LED CRI on the AD9910 evaluation board illuminates When the USB cable is connected the Found New Hardware Wizard window appears 3 Ifyou are using Windows 2000 click Finish in the Found New Hardware Wizard After the window has disappeared the USB Status LED CR2 on the AD9910 evaluation board flashes which indicates that the evaluation board is connected properly UG 207 Windows XP Users Power up the AD9910 evaluation board see Table 2 2 Connect the evaluation board to the computer via the USB port using a USB cable Then the VBUS LED CRI on the AD9910 evaluation board illuminates 3 When the USB cable is connected the Found New Hardware Wizard appears Click Next to continue to the AD9910 Firmware Loader 4 Click Continue Anyway when the Hardware Installation Warning window appears 5 Click Finish in the Found New Hardware Wizard when installation is complete 6 Click Next when the next Fou
15. file 6 07481 011 RAM playback destination Refer to the AD9910 data sheet for further details on the RAM playback destination bits Use the LOAD button to display the RAM I O window RAM I O RAM I 0 Window Loads the RAM Data file into the RAM using the currently selected RAM Segment FAM Data File l Data Format Load File RAW Binary o Configures the AD9910 for Single Tone RAM mode and uses RAM Segment to read the entire RAM storing the RAM data in a file named RAMDump txt This RAM Data file is stored in the same folder as the Eval Software executable file Output Data Format RAW Binary E sii File Ir soisoad Figure 14 RAM I O Window 07481 012 The RAM I O Window allows you to easily interface RAM data into the AD9910 Use the RAM Data File box to locate the RAM file on the PC Use the Data Format drop down box to select the file format The options are RAW Binary RAW Hex and RAW Decimal Use the Load File button to transfer the data to the AD9910 The Read RAM to File button allows you to read the data from the RAM to a file in the same folder as the evaluation board software The Output Data Format allows you to select the format of the output file The options are RAW Binary RAW Hex and RAW Decimal Use the Open File in Notepad check box to view the file immediately DEBUG To access the Debug window select Debug Window from the View drop down menu see Figure 10 DUT Signa PA
16. file register to activate The active profile register is the one that supplies the frequency tuning and phase offset words along with the amplitude control and the DDS core This window controls three external pins which can also be driven by an external source Other Controls Enable Profile ASF allows you to set the amplitude scale factor in the Profile window This allows the device to ramp to a value less than full scale Enable Sine Out activates the sine output of the DDS otherwise the cosine output is active Enable RAM allows you to enable the RAM playback from this window See the RAM Operation section for more information on using the RAM The RS OVR message box alerts you when a RAM sweep is complete Rev A Page 10 of 16 Evaluation Board User Guide VIEW WINDOWS To access additional windows select View from the AD9910 Evaluation Software drop down menu bar E AGGS10 Evaluation Software Rale Period Osa tbee 5 LO Update Clock Drnidear l Enable PFO Input Doubs PPC Aat PFE Anibackiach Py ti System Clock Si0 MHz Ampltude SF p 5 00000 I Enable 170 Syne Clock Output Pin I Enable Matched Latency I Auto Clear Phase Accumulator Profile Profle 0 OuputFea p oonono00 MHz OvpFreg g ooooo0000 MHz Phase Oiteat 0 000 Deo Phase Offsat fi 0 000 Deg Aanpiluade SF f f mooo Armpltude SF a w CCW 1 f oom Deg Amplitude SF h Do000N ApaidesSE fi f ooon a CoE
17. filtered default output of the DAC Clock Mode Select This connection controls whether the reference clock source is a 20 MHz to 30 MHz crystal or is from an external signal generator A 25 MHz crystal is provided on the underside of the AD9910 evaluation board Ref Clock Input This is the input for the external reference clock signal Power Supply Connections These two connectors TB1 and TB2 provide all necessary supply voltages needed by the AD9910 and the evaluation board see Table 2 USB Port When the part is under PC control default mode the evaluation board communicates with the AD9910 via this port Rev A Page 4 of 16 EVALUATION BOARD SOFTWARE INSTALLING THE SOFTWARE Follow these steps to install the AD9910 evaluation software 1 Log into your PC system with administrative privileges 2 Uninstall any previous versions of the AD9910 evaluation software from your PC system 3 Insert the AD9910 evaluation software CD into your CD ROM drive Do not connect the AD9910 evaluation board to the computer until the AD9910 evaluation software has been successfully installed Refer to the Readme txt file located in the Software folder before proceeding with the installation of the AD9910 evaluation software 4 Run the setup exe file located in the Software folder and follow the AD9910 evaluation software onscreen installation instructions INSTALLING THE DRIVER Once the software is successfully install
18. he input frequency The default setting of this box is disabled check box cleared indicating that the reference clock multiplier circuitry is bypassed and the reference XTAL Out selects the output drive strength of the XTAL reference output There are three drive strengths and a disable mode PLL Lock indicates when the PLL is in a valid lock state If the clock crystal REFCLK input is piped directly to the DDS core PLL falls out of lock the indicator light display illuminates The Refresh button allows you to poll the AD9910 to refresh the PLL CP Current selects the charge pump current output of the PLL Lock flag in the reference clock multiplier circuitry Selecting a higher current output results in the loop locking faster but there is a Rev A Page 7 of 16 UG 207 System Clock displays the operating frequency the DDS core system The value shown is derived from the values entered in the External Clock text box and the Multiplier spin box Refer to the AD9910 data sheet for more information regarding clock modes and operation Setting the I O Update Options Use Internal IO Update sets the I O update pin to an output This output generates an active high pulse when the internal I O update occurs The rate of the internal I O update can be programmed through the serial port Refer to the AD9910 data sheet for more information Power Down Digital DAC Clock Input and Aux DAC These power down controls allows you to
19. n box respectively Amplitude SF digitally controls the amplitude of the carrier from the DDS This scalar has 14 bits of resolution Note that this can be used in conjunction with DAC Gain Ctrl in the AUX DAC Control section see Figure 5 to increase the flexibility of the output amplitude The spin boxes for amplitude SF are set to 1 bit by default The number of bits can be changed to your preference by typing in the spin box Data Entry Windows The Edit output frequency dialog box see Figure 7 appears by double clicking the Output Freq text box in the Profiles window The Edit output frequency window allows you to set individual bits in the frequency tuning word register These bits can be typed in decimal hexadecimal or binary format in the Tuning Word Values area This window also allows you to enter in a tuning word and see the correct decimal hexadecimal or binary representation for this word The Frequency spin box allows you to scroll through the different tuning words one bit at a time using the up and down arrows Edit output frequency Frequency 9 000000000 MHz Tuning Word Values goo0000000 Dec pooooo00 Hex 00000000 00000000 00000000 00000000 E n 07481 006 Figure 7 Edit Output Frequency Pop Up Dialog Box Rev A Page 9 of 16 UG 207 The Edit Phase Offset dialog box see Figure 8 appears by double clicking the Phase Offset text box in the Profiles window The Edit Phase Offset window allows y
20. nd New Hardware Wizard appears This is for the EZSSP device 7 Click Continue Anyway when the Hardware Installation Warning window appears 8 Click Finish in the Found New Hardware Wizard when installation is complete Once the Found New Hardware Wizard window disappears the USB status LED CR2 on the AD9910 evaluation board flashes which indicates that the evaluation board is connected properly If the LED does not flash verify that all power and USB connections are properly connected LAUNCHING THE PROGRAM Follow these three steps to load the AD9910 evaluation software 1 Before starting the software make sure that the AD9910 evaluation board is powered up connected to the computer and that the USB status LED is flashing 2 Click the Start button located at the bottom left hand corner of your screen 3 Select Programs then the AD9910 Eval Software folder and then AD9910 Eval Software to load the software One of several status messages appears These messages are discussed in further detail in the next section Status Messages Upon Loading Software Rev A Page 5 of 16 UG 207 Status Messages Upon Loading Software Once the AD9910 evaluation software is loaded a green splash window appears The status box within the splash window displays the status of the AD9910 evaluation software Green writing in the status box indicates that the software has successfully loaded A successful load is followed by the s
21. ou to set individual bits in the phase offset word register These bits can be typed in decimal hexadecimal or binary format in the Register Values area This window also allows you to type in a tuning word and see the correct decimal hexadecimal or binary representations for this word The Phase Offset spin box allows you to scroll through the different tuning words one bit at a time using the up and down arrows Edit Phase Offset Phase Offset A ERE beg Register Values ooooo Dec ogogo Hex oo000000 00000000 Bin 07481 007 Figure 8 Edit Phase Offset Pop Up Dialog Box The Edit Output Scale Factor dialog box see Figure 9 appears by double clicking the Amplifier SF text box in the Profiles window The Edit Output Scale Factor window allows you to set individual bits in the ASF scale factor register These can be typed in decimal hexadecimal or binary format This window also allows you to type in a tuning word and see the correct decimal hexadecimal or binary representation for this word The Output Scale Factor spin box allows you to scroll through the different tuning words one bit at a time using the up and down arrows Edit Output 5cale Factor Output Scale Factor 9 00000 0 00000 Register Values o0000 Dec o000 Hex 000000 00000000 Ein 07481 008 Figure 9 Edit Output Scale Factor Pop Up Dialog Box Activate In the Activate area of the Profiles window you can select which pro
22. plied simultaneously Auto Clear Phase Accumulator sets the DDS phase accumulator to a reset state when the I O update pin is set high or when a profile changes Clear Phase Accumulator holds the DDS phase accumulator in a reset state as long as this bit Bit 11 is set The Show Warnings check box can be cleared to have the AD9910 evaluation board software suppress any warnings about the operation of the AD9910 For example a warning appears if you try to program the VCO or PLL to a state that is not recommended in the AD9910 data sheet Loading Data The LOAD button is used to send data to the AD9910 All LOAD buttons found in the evaluation software have the same functionality When new data is detected LOAD flashes orange indicating that you need to click LOAD to send the updates to the serial I O buffer where they are stored until an I O update is issued The I O update sends the contents of the serial I O buffer to active registers I O updates can be sent manually or automatically By default the AD9910 evaluation software is set to auto I O update so that when LOAD is clicked an I O update signal is automati cally sent to the device If synchronization across channels is desired clear the Auto check box on the toolbar and click the I O Update button see Figure 4 when you wish to send an I O update The Show Warnings check box located above LOAD can be selected to display warnings when you have entered data that e
23. power down each of the specific circuit blocks individually External PD Mode allows you to control which power down mode is used in conjunction with the External Power Down Pin button The Fast Recovery mode sets the AD9910 into a power down state that keeps clocks running and bias circuits active but does not allow the part to output data This mode uses significantly more power than the Full Power Down mode The Full Power Down mode stops clocks and powers down bias circuits This mode takes significantly longer to power back up from a power down state The External Power Down Pin button allows you to control the EXT_PWR_DWN external power down pin without having to alter the evaluation board See the AD9910 data sheet for more information about power down conditions AUX DAC Control DAC Gain Ctrl controls the auxiliary DAC setting to select the full scale output current of the DAC See the AD9910 data sheet for more information about DAC gain setting DAC lout displays the full scale output current of the DAC This number is based on a DAC_ RSET resistor value of 10 kQ Setting Other Control Window Options Enable I O Sync Clock Output Pin allows you to enable or disable the output driver for the I O sync clock output Enable Matched Latency allows you to align the application of the frequency tuning word the phase offset word and the amplitude scale factor at the same time If this bit is cleared then those words are not ap
24. ror occurs Using the Clear Error button you can clear a sample error Refer to the AD9910 data sheet for details on synchronizing multiple parts Rev A Page 13 of 16 UG 207 RAM OPERATION Profiles Profile 0 Active RAM Segment 0 Beginning Address fo Load Final Address o a AGdest Step Rate 3706 8800 us Mode Cortrot Zeo Crossing M NH RAM Segment 1 Beginning Addess 0 FnaAddes o o Addess Step Rate 9 0000 us Moda Cortrot Direct Swatch Y M Zeo Crossing M N RAM Segment 2 BegnningAddess g Final Adc ess o o Addes StepRate 9 0000 s Mode Cortot Oweck Svatch M Zeo Crossing M N Use of RAM on the AD9910 should not be attempted without using the AD9910 data sheet as a reference The AD9910 data sheet contains detailed information on RAM operation To use RAM Segment 3 Begnrmg Address lo Final Address o Address Step Rate 0 0000 us Mode Cortrot M ZeroCrossing M N RAM Segment 4 BegnrangAddess o Final Address o Address Step Rate 9 9000 us Mode Cortrot Direct Swatch ZetoCrosting T N RAM Segment 5 Beginning Addes D Final Address io Address Step Rate 9 0000 us Mode Cortrat Drect Swatch X ZeoCossng Figure 13 Profiles Window When Using the RAM the RAM on the AD9910 select the Enable RAM check box on the Profiles window This changes the appearance of the window from single tone mode to RAM control mode Each RAM Segment
25. signal to the part The first option allows the user to provide a high frequency input signal connected to J1 The second option allows the user to connect using a lower input reference frequency enabling the clock multiplier and connects through J1 The third option allows the user to connect a crystal resonator on the backside of the board Note that the AD9910 evaluation board does not populate the PLL loop filter components Therefore to use the internal PLL of the AD9910 the user must solder down these components or else the PLL is not stable The AD9910 data sheet has helpful formulas to calculate the appropriate values In addition an Excel file to help choose the loop filter component values is available at www analog com Go to the AD9910 product page and click on the Evaluation Boards and Development Kits tab To enable the crystal mode switch the jumper W7 to the XTAL mode Remove C51 and 52 Place 0 zero Q resistors at R4 and R11 on the backside of the board The crystal oscillates at 25 MHz Refer to the AD9910 data sheet for details on the maximum input speeds and input sensitivities of these two inputs Device Communication Requirements Two interface options are available on the evaluation board e USB 1 1 2 0 e Header row U5 and U9 which places the part under the control of an external controller such as a microprocessor FPGA or DSP Analog Devices provides a GUI for the PC it does not provide control
26. ss than the value in the Sweep 1 register Use the Rising Step Size and Falling Step Size boxes to set the step size of the rising or falling ramp The unit for these changes depending on what type of ramp is being generated The Rising Step Interval and Falling Step Interval are used to set the time between each rising or falling step on the ramp This is in units of microseconds The No Dwell High and No Dwell Low boxes set the correspond ing bit functions in the register map Use the Up Down and Pause buttons at the bottom of the window to control the direction or to pause the ramp The Ramp Finished message box lights up when the ramp is complete Rev A Page 12 of 16 OSK To use the OSK function of the AD9910 select the Enable Output Shift Keying check box Set the Amplitude Scale Factor to control the final amplitude of the signal Select the Use External OSK Pin box for manual control of the OSK Use the OSK Pin button to turn the OSK on off manually The OSK Pin button controls a pin that can be driven externally Select the Enable Auto OSK to use the automatic OSK func tion Set the Amplitude Ramp Rate and the Amplitude Step Adjust using the text box and drop down box provided The Load ARR I O Update box allows you to reload the ramp rate timer when an I O update is issued or when there is a profile change Auxiliary Sources The Auxiliary Sources area allows you to set the Output Frequency and Phase Offset when using
27. sseeeeeeeeeeeeees 15 Rev A Page 2 of 16 EVALUATION BOARD HARDWARE REQUIREMENTS To successfully use the evaluation board and run the software the requirements listed in Table 1 must be met Table 1 AD9910 PCBZ Requirements Item Requirement Operating Windows 98 ME 2000 XP System Processor Pentium or later Memory 128 MB minimum Ports One USB port Clocking Signal generator capable of generating sinusoidal waves of at least 0 dBm up to at least 10 MHz Capability to generate at least two independent dc voltages 1 8 V 3 3 V Appropriate measurement device such as a spectrum analyzer or a high bandwidth oscilloscope USB 1 1 2 0 cable and SMA to X cables X SMA or BNC depending on the connector of the device interfacing with the board SETTING UP THE EVALUATION BOARD DC Power Supply Power Supplies Measurement Cables The AD9910 evaluation board has two power supply connectors four pins each TB1 and TB2 TB1 powers the USB interface circuitry the digital I O interface and the digital core TB2 powers the DAC and the clock input circuitry CONNECTORS Table 2 shows the necessary connections and the appropriate biasing voltage Table 2 Connections and Biasing Voltage Connector TB1 VCC_USB TB1 GND TB1 DVDD_IO TB1 DVDD TB2 GND TB2 DAC_VDD TB2 CLK_VDD UG 207 Device Clock Oscillator Options The AD9910 architecture provides the user with three options when providing an input
28. tatus box disappearing A splash window with red writing in the status box indicates that an error occurred You can move the pointer over the red writing which allows you to scroll up and view the details and possible cause of the error see Figure 3 Most status message errors can be resolved by checking jumper settings making sure that the evaluation board is powered up correctly and inspecting the USB port and cable connections When all power USB port cable connections and jumper settings are correct an error may still appear if the clock input AD9910 Evaluation Software is not properly configured If any modifications to the board were made check the changes against the provided evaluation board schematics for the AD9910 Check to make sure that the clock input source is connected and properly configured Figure 3 Splash Window Error Status Box File ro View Help ba tele Extemal Clack 100 00000 MHz 2 Divider Disable Enable PFD Input Doubler l PFO amp Reset PED ntibacklath Py fo LF Curent i cr Use Internal 10 Update VO Update Rate Fenod E Profiles Profile 0 Active Profile 0 Output Fea o o00000000 MHz Phase Oliset i f 0 000 Dea Amplitude SF i ef 0 13605 Profile 1 Output Freq o 000000000 MHz Phase Offset ooo Deg Amplitude SF i 0 00000 System Clock 150 00000 E F Enable 1 0 Syne Clock Output Pin Enable
29. the internal RAM Refer to the RAM Operation section and the AD9910 data sheet for more detailed information MULTICHIP SYNC CONTROL Multi Chip Sync Input Syne Pulse Delay Syne Enable fo v Syne Driver Enable Generate Sync Pulse Output Syne Pulse Delay loo On Falling Sysclk Edge On Rising Sysclk Edge Syne Window Delay lo l Syne Sample Error gt Clear Error 07481 010 Figure 12 Multi Chip Sync Window UG 207 The Multi Chip Sync window allows you to set up the sync function This allows you to sync multiple chips to one master AD9910 Refer to the AD9910 data sheet for a full description on multichip sync functions The Input Sync Pulse Delay drop down box sets the input delay of the synchronization receiver in 150 ps steps The Output Sync Pulse Delay sets the output delay of the synchronization generator in 150 ps steps The Sync Window Delay sets the state that the internal clock generator assumes when it receives a sync pulse The Sync Enable check box allows you to set the synchronization clock receiver to active The Sync Driver Enable check box sets the synchroniza tion clock generator to active The Generate Sync Pulse area allows you to select the sync pulse generation corresponding to the rising or falling SYSCLK edge The Sync Sample Error area notifies you when there is a sync sample error The No Error message box changes to Error and blinks when an er
30. tically taken without the need to click the Apply button REGISTER MAP SOFTWARE BUFFER VALUES To access the Register Map Software Buffer Values window select Register Map Values from the View drop down menu see Figure 10 a Register Map Software Butter Values ee ee ee eee oe eee Se ee ee LL ee 20 GOGO COORD OOOO Oe eee eS m a m aam ma mj m m a LAMA S E a m m m m an E E a R ETAT RTE OT ETAT ETAT P a P e ta W Auto Refresh Binary Choose REGMAP Bull New Values 07481 014 Figure 16 Register Map Software Buffer Values Window The Register Map Software Buffer Values window allows you to switch between the current values and the values that are loaded in the software buffer This window does not allow Rev A Page 15 of 16 UG 207 changes to the register map Instead this window can be used in conjunction with any other control window to observe register changes that are written from the software buffer The drop down menu labeled Choose REGMAP Buff allows 0 Port Config you to switch between Current Values and New Values Under Format you can chose to view the registers in binary or 2 ite hexadecimal format by selecting the applicable option Note C aie that when the Auto Refresh check box is selected the action is automatically taken without the need to click the Refresh button Data Format DUT I O fe MSE First To access the DUT I O window select DUT I O from th
31. xceeds the specifications of the AD9910 Rev A Page 8 of 16 PROFILES WINDOW I Profiles Profile 0 Active Output Freq 0 000000000 Phase Olfset jj 0 000 Be E Profile 1 Output Freg 0 000000000 Phase Offset h 0 000 Profile 2 Output Freq O 000000000 Phase Offset 7 0 00 Profile 3 Output Freq 0 000000000 Phase Offset E 0 000 i n ponani Profile 4 Output Freq 0 000000000 Phase Offset iz a 0 000 nn Profile 5 Output Freq 0 000000000 1i Profile 6 Output Freq o o00000000 MHz Phase Offset h 0 000 Deg i n nonna Profile 7 Output Freq o o00000000 MHz Phase Offset i 0 000 Deg Enable Profile ASF Enable Sine Dut Enable RAM m Ii CEPI lil J Phase Offset j 0 000 a oona 07481 005 Figure 6 Profile Control Window The Profiles window allows you to change the different profile settings easily Figure 6 shows the Profiles window for using the single tone mode SINGLE TONE MODE Output Freq is used to set the frequency generated by the DDS The AD9910 generates a sine cosine wave at this output frequency Phase Offset controls the phase of the DDS output This can be changed from 0 to 360 with 16 bit resolution The spin boxes for phase offset are set to 1 bit by default The phase offset degree and number of bits can be changed to your preference by typing in the text box and spi
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