HOLTEK HT9312/3 Series handbook
Contents
1. 12 HT9312 3 Series Off hook Applying a falling edge to HDI Changing the HFO pin from low to high Hold line function table Current State Input Next State HKS HFI HDI HKS HDO H L X L H An L An H L An H L H H A L H X X L H L L L L L X L H An L An D Ee e pol q D L H L L an L An L x x L H H An An X L 1 H A L H H Logic HIGH X Don t care Rising edge L Logic LOW An Unchanged Falling edge DOUT BCD code When dialing the corresponding 4 bit BCD codes are serially presented on DOUT from MSB to LSB The data of DOUT is valid at the falling edge of the CLOCK pin The following table lists the BCD codes corresponding to the keyboard input BCD Code BCD Code 21st Jan 98 HOLTEK f LOCK function The function aims to detect locked dialing num ber to prevent a long distance call The dialing output of the chip is disabled if the first input key after on off hook is the locked number when the lock function is enabled The lock function selection is listed below This function is imple mented in both the HT9312xL HT9312xI and HT9312xLT HT9312xIT The HT9312x HT931 3x and HT9312xT do not support this function Function Keyboard operated IDD lock No No2. Applicat Off hook 22Ma2 2 2ka iN 1N4148 1 4148 77 220ka 4148 ZiuF DTMF HT9312B BL BI HT9313B e 22 SDIP NETWORK VSS MODE tror Rew 1N4148 1A bridge 3 58MHz resonator Rk for dialing signal option Refer to the functional description Unspecified transistors are of 8050 type 1uF capacitor between XMUTE and VSS GND is recommended The HT381XX HT3810 series provides a melody during the hold period 21st Jan 98 24 HT9312 3 Series HOLTEK Application circuit 3 Ring 1A bridge 1N4148 TN4148 HT9312C CL CI HT9313C 20 DIP 93 58 uz resonator Rk for dialing signal option Refer to the functional description Unspecified transistors are of 8050 type 1 F capacitor between XMUTE and VSS GND is recommended HT16XX LCD DRIVER see HT16XX data SPEECH NETWORK 21st Jan 98 25 HT9312 3 Series HOLTEK t4 lon Circul Applicat 1A bridge HT9312D DL DI HT9313D 24 SDIP Rk for dialing signal option Refer to the functional description Unspecified transistors are of 8050 type A 1uF capacitor between XMUTE and VSS GND is recommended HT381XX HT3810 series provides a melody during the hold period 16 1N4148 HKS DTMF 18 LCD DRIVER see HT16XX data SPEECH NETWORK 21st Jan 98 26 HT9312 3 Series HOLTEK Application circui
3. D1 D2 Dn SAM Unchanged SAM Unchanged b The first key Note Tr break a flash time Keyboard input m Dialing output D1 02 Dn RM Unchanged SAM Unchanged Pause Keyboard input Dn or RA E Dialing output D1 02 TP Dn 1 Dm RM 01 02 Dn P Dn 1 Dm SAM Unchanged 16 21st Jan 98 HOLTEK f Memory store HT9312 3 Series Memory store without dialing output Memory store with dialing output Keyboard input Dn ST EMal Dialing output D1 02 Dn RM D1 D2 Dn SAM Unchanged Keyboard input 29 Dialing output D1 02 Dn RM D1 02 Dn SAM Unchanged Note If the dialing number exceeds 32 digits the memory store is inhibited However if the dialing number is not more than 32 digits the memory will store a max of 16 digits EMa EM1 EM3 Memory dialing EMa content D1 D2 Dn Keyboard input Dialing output D1 D2 Dn RM D1 02 SAM Unchanged Note EMa EM 1 EM3 Chain dialing 1 content D1 02 Dn EM content Dn 1 Dm Keyboard input Dialing output D1 02 03 D1 02 1 EM1 Unchanged EM2 Unchanged RM D1 D2 Dn SAM Unchanged Note The maximum capacity of the RM memory is 32 digits When the dialing number exceeds 32 digits redialing is inhibited and PO VDD Note RM Redial memory SAM Save dialing memory D1 D2 Dn 0 9 Dn 1 Dm 0 9 4 17 21
4. During the dialing signal transmission the ST key is inhibited Redial and pause function key If it is pressed as the first key after off hook this key exe cutes the redial function Otherwise it works as the pause key A Auto key When this key is pressed before pressing any one of the digital keys 0 9 it executes the two touch memory dialing func tion 21st Jan 98 HOLTEK f 7 Keyboard operation HT9312 3 Series The following operations are all described under an on off hook or on hook condition with the hand free active condition Normal dialing Pulse mode a without T Keyboard input Dialing output D1 02 Dn RM 01 02 Dn SAM Unchanged Tone mode a without T Keyboard input z Dialing output D1 D2 Dn RM D1 02 Dn SAM Unchanged b with T b with T Keyboard input DT 02 A Keyboard input DT DZ 2 Dialing output D1 D2 Dn Test Dn 1 Dm Dialing output D1 02 1 Pulse Tone RM D1 D2 Dn Dn 1 RM D1 02 Dn T Dn 1 SAM Unchanged SAM Unchanged Note The maximum capacity of the RM memory is 32 digits When more than 32 digits are entered the signal is transmitted but the redial function is inhibited Redial Pulse mode Tone mode a without T a without RM content D1 D2 Dn Keyboard input or R P Dialing output D1 D2 Dn RM Unchanged SAM Unchan
5. hold line background melody Refer to the functional description for the hold line function Keytone output pin Outputs a 1 2kHz tone carrier when any key is pressed in the pulse mode or when the function keys are pressed in the tone mode This pin is a schmitt trigger input structure Active high Applying a positive going pulse to HFI can toggle the HFO once and hence control the hand free function The pull low resistance of HFI is 200 typ An external RC network is recommended for input debouncing HFO CMOS OUT The HFO is a CMOS output structure Its output is toggle controlled by a positive transition on HFI pin When HFO is high the hand free function is enabled and PO outputs a high to connect the line The hand free function can be released by setting HDO high or by an on off hook operation or by another HFI input Refer to the functional description for the hand free functional operation 6 21st Jan 98 Internal Connection Description NMOS open drain output pin It outputs the BCD code of the dialing digits to the LCD driver chip HT16XX series for dialing number display Refer to the functional description for the detailed timing NMOS open drain output When dialing it outputs a series of NMOS OUT pulse trains for DOUT data synchronization DOUT data is valid at the falling edge of clock NMOS OUT Positive power supply 2 0V 5 5V for normal oper
6. ot supported for HT9312xI and HT9312xIT No Yes Lock 0 Yes No Lock 0 9 Yes Yes Allkeys are locked Key definition 0 1 2 3 4 5 6 7 8 9 keys These are dialing number input keys for both the pulse mode and the tone mode operations T This key executes the function and waits a Tp T duration in the pulse mode the other hand the T key executes the function in the tone mode This is a dialing signal key for the tone mode only no response in the pulse mode SA Pressing this key can save the preceding dialing telephone numbers The saved number is redialed if it is pressed again SA will also redial the saved number if it is the first key pressed at the off hook state During the dialing signal transmission the SA key is inhibited 13 HT9312 3 Series F The flash key can be selected as a digit or asa control key by the option resistors 1 amp RK14 Pressing the flash key will force the PO pin to be low for the duration and is then followed by Tr can also be selected by Rk13 RK14 P Pause key The execution of this key pauses the output for the Tp duration Tp can be selected by Rxa1 R Redial key Executes redialing as well as one key redial function ST Store key The execution of the key can actu ate the store memory function with or with out dialing output and it can store lock number with personal code in IDD lock opera tion
7. 02 Dn RM D1 D2 Dn SAM D1 02 Dn SAM D1 D2 Dn b with T b with T Keyboard input D7 D2 Keyboard input D7 D2 Dialing output D1 02 Dn Tet Dg Dialing output D1 D2 Dn Dn 1 Dm Pulse Tone RM D1 02 Dn 1 RM D1 02 Dn 1 Dm SAM 01 02 T Dn 1 Dm SAM 01 02 Dn Dn 1 Dm Note The maximum capacity of the RM memory is 32 digits When more than 32 digits plus the SA key are entered the SAVE function will not be executed and all the existing data in the save memory will not be changed 15 21st Jan 98 SA dialing Pulse mode Tone mode a without T a without T SAM content D1 D2 Dn SAM content 01 02 Dn Keyboard input Keyboard input Dialing output D1 D2 Dn Dialing output D1 02 Dn RM Unchanged RM Unchanged SAM Unchanged SAM Unchanged b with T b with T SAM content 01 02 Dn T Dn 1 Dm SAM content 01 02 Dn Dn 1 Keyboard input Keyboard input Dialing output 01 02 Dn TP T 1 Dm Dialing output D1 02 Dn Dn 1 Dm Pulse Tone RM Unchanged RM Unchanged SAM Unchanged SAM Unchanged Flash Flash as a digital key Flash as a control key a The intervenient key Keyboard input Keyboard input M m Dialing output 01 02 Dn Tr Dn 1 Dialing output 01 02 Dn Tre Dn 1 Dm Dm RM Dn 1 RM
8. 12BLT 2255 4 4 24 SDIP Lock All 98 ms HT9312CLT 4 4 22 SDIP Operated HT9312DLT N Lock 4 N N 28 SDIP HT9313x Normal version HT9313A 18 DIP HT9313B N 22 SDIP 86 ms HT9313C N 20 DIP HT9313D N N 24 SDIP 2 HT9312 3 Series 21st Jan 98 HOLTEK Pin Assignment HT9312x xL HT9313x version HDO R4 cigi R4 1 R3 care R3 2 R2 R2 3 R1 R1 4 MODE cas 16 MODE 5 DTMF 15 E 6 2 7 14 7 AKS 13 D AKS 8 13 0 VDD 56 19 12 O VDD 9 12 1 10 11 HT9312A AI AL HT9312B BI BL HT9312C CI CL HT9313A HT9313B HT9313C 18 DIP 22 SDIP 20 DIP HT9312xT xLT versions KT HDO Test C1 22 OKT R4 2 21 R3 c203 20 O R2 6304 19 82 1 c4 gs5 18 ORT MODE cge 17 MODE DTMF xiL 7 16 x208 15 13 DOUT 11 12 LJ CLOCK HT9312AT AIT ALT HT9312BT BIT BLT HT9312CT CIT CLT 20 DIP 24 SDIP 22 SDIP HT9312 3 Series HDI E 24 P HDO 1 2 23 R4 c2 22 4 21 gt 5 20 ORI 5 6 19 E MODE 107 18 0 DTMF 8 17 XMUTE 16 AKS vss 10 15 Elvpp HFI E 11 14 O HFO DOUT L 12 13 HT9312D DI DL HT9313D 24 SDIP 1 28 NC 2 27 3 26 O HDO 4 R4 2 05 R3 caLje R2 4 7 RT 15 CLOCK HT
9. 5V 1 mA IHKS HKS Pin Input Current 2 5V 5 2 5 E 0 1 pA RHFI HFI Pull Low Resistance 2 5 2 5 200 ko RED HDI Pull High Resistance 2 5 0 200 LEG Keypad Pin Source Current 2 5 0 4 40 pA lori Keypad Pin Sink Current 2 5 Vor 2 5V 200 400 Pin Source Current 2 1 mA lora HFO Pin Sink Current Vor 0 5V 1 mA Tous HDO Pin Source Current 2 1 mA HDO Pin Sink Current Vor 0 5V 1 mA Control key 0 2 Trp Pause Time After Flash s Digit key 1 TRP pom Redialing Pause E One key redialing 1 s Debounce Time 20 ms 5 for One key One key redialing 1 2 s Keytone Duration 34 ms Keytone Frequency 1 2 kHz Fosc System Frequency Crystal 3 5795MHz 3 5759 8 5795 3 5831 MHz 8 21st Jan 98 HOLTEK f Pulse Mode Electrical Characteristics HT9312 3 Series Fosc 3 5795MHz Ta 25 C Tone Mode Electrical Characteristics Test Conditions Symbol Parameter Min Typ Max Unit Conditions PO Output Source 2 5 2 02 B ce Current pon ee 2 5V Vor 0 5V 0 2 0 6 mA Current MODE pin is connected 10 PR Pulse Rate to
10. 9312 3 Series HOLTEK t8 lon Circul Applicat Off hook 22MQ 1A bridge 2 2 1 4148 Handfree El ARS 22 he HT9312DT DLT DIT 28 SDIP SPEECH NETWORK LCD DRIVER see HT16XX data To Buzzer Hk for dialing signal option Refer to the functional description Unspecified transistors are of 8050 type 1uF capacitor between XMUTE and VSS GND is recommended The HT381XX HT3810 series provides a melody during the hold period 21st Jan 98 30
11. 9312DT DIT DLT 28 SDIP 21st Jan 98 HOTE HI83126 Series Keyboard Information Form A Ci C2 C4 05 Block Diagram T FSM Control Check a Contr che iud bod Key i Function Encoder H 2 21 XMUTE i HKS HD HF Flash M In Y MO Flash gu HDO m Clock Y HFO i QUT EHE UM TRIER DES TEST 4 21st Jan 98 Pin Description Pin Name Description Connection These pins form a 4x5 keyboard matrix which can perform keyboard input detection and dialing specification setting functions When on hook HKS high all the pins are set high While off hook the column group C1 C5 remains low and the row group R1 R4 is high for key input detection 1 5 Io COMAS An inexpensive single contact 4x5 keyboard can be used as an R1 R4 IN OUT input device Pressing a key connects a single column to a single row and actuates the system oscillator that results in a dialing signal output If more than two keys are pressed at the same time no response occurs The key in debounce time is 20ms Refer to the keyboard information for keyboard arrangement and to the functional description for dialing specification selection The system oscillator consists of an inverter a bias resistor X1 I and the necessary load capacitor on chip Connecting a st
12. HOLTEK HT9312 3 Series 12 Tone Pulse Dialer Features Universal specification Operating voltage 2 0 5 5 Low standby current Low memory retention current 0 11 Typ switchable Interface with LCD driver 32 digits for redialing 32 digits for the SA memory dialing One key redialing Pause and key for PBX 4x5 keyboard matrix 3 58MHz crystal or ceramic resonator General Description The HT9312 3 series tone pulse dialers are CMOS LSIs for telecommunication systems They are designed to meet various dialing specifications through resistor option matrix The HT9312 3 series tone pulse dialers are offered in four different versions They are HT9312x HT9313x normal version HT9312xL Patent Number 64097 86474 113235 R O C 5424740 U S A Hand free control Hold line control Pause P T can be saved for redialing Lock function Keytone function Resistor options M B ratio Flash function and flash time 86ms 600ms Pause and duration Pulse number Keyboard operated IDD lock function Keyboard form HT9312xI lock version with keyboard operated IDD lock function HT9312xT keytone version HT9312xLT HT9312xIT keytone lock func tion version The four versions also supply the following functions Hold line Hand free and LCD dialing number display interface all of which are suitable for feature phone applica tions 21st Jan 98
13. HOLTEK Selection Table Function 7 Min Keytone Lock Function Hold Hand LCD Flash Package Line Free Interface Time HT9312x Normal version HT9312A 18 DIP HT9312B 4 E 22 SDIP 98 ms HT9312C 20 DIP HT9312D N N N 24 SDIP HT9312xl Mechanical Lock Version HT9312AI 18 DIP Lock 0 SDIP HT9312BI Lock 0 9 E E eund 22 HT9312CI Lock All 4 20 DIP HT9312DI 4 4 4 24 SDIP HT9312xL Mechanical and Keyboard Operated Lock Version HT9312AL Lock 0 28 18 DIP Lock 0 9 HT9312BL Lock All 4 di 22 SDIP HT9312CL Keyboard 4 20 DIP Operated HT9312DL Lock N 4 24 SDIP 9312 Keytone version HT9312AT N 20 DIP HT9312BT N N 4 24 SDIP 98 ms HT9312CT N N 22 SDIP HT9312DT N N 4 4 28 SDIP HT9312xIT Mechanical Lock with keytone Version HT9312AIT 20 DIP HT9312BIT ee N N 24 SDIP Lock 0 9 98 ms HT9312CIT Lock N 22 SDIP HT9312DIT N N 28 SDIP HT9312xLT Mechanical and Keyboard Operated Lock with Keytone Version HT9312ALT V Lock O 20 DIP Lock 0 9 HT93
14. LTEK f HT9312 3 Series Pin Name Lo Internal Connection Description MODE IO CMOS IN OUT This is a three state input output pin used for dialing mode selection either Tone mode or Pulse mode 10pps 20pps MODE VDD Pulse mode 10pps MODE OPEN Pulse mode 20pps MODE VSS Tone mode During the pulse mode dialing switching this pin to the tone mode changes the subsequent digit entry to tone mode When the chips are in tone mode switching to pulse mode will also be recognized DTMF CMOS OUT This pin is active only when the chip transmits tone dialing signals Otherwise it always outputs a low The pin outputs tone signals to drive the external transmitter amplifier circuit The load resistor should not be less than 5 HDI CMOS IN Pull High This pin is a schmitt trigger input structure Active low Applying a negative going pulse to this pin can toggle the HDO output once An external RC network is recommended for input debouncing The pull high resistance is 200 typ HDO HFI CMOS OUT CMOS OUT CMOS IN Pull Low The HDO is a CMOS output structure Its output is toggle controlled by a negative transition on HDI When HDO is toggled high PO keeps high to hold the line The hold function can be released by setting HFO high or by an on off hook operation or by another HDI input The HDO pin can directly drive the HT9312 3 series melody generator to produce a
15. Vpp pps MODE pin is opened 20 A resistor is linked between R2 and C1 m 39 66 m M B Make Break Ratio No resistor is linked 40 60 between R2 and C1 MB ratio 40 60 40 10pps 20 20pps Pre digit pause Time ms 33 10pps MB ratio 33 66 17 20 Pulse rate 10pps 800 Inter digit pause Time ms Pulse rate 20pps 500 A resistor is linked 88 10 _ between R2 and C1 17 20pps TM Pulse Make Duration ms No resistor is linked 400pps _ between R2 and C1 20 20pps resistor is linked 66 0 _ between R2 and C1 33 20pps Pulse Break Duration ms No resistor is linked __ 60 10 _ between R2 and C1 30 20pps Fosc 3 5795MHz Ta 25 C Symbol Parameter desu Min Unit Conditions Output DC Level 0 45Vpp 0 7Vpp V DTMF Sink Current 2 5V 0 5 0 1 mA VTAC Output AC Level Row group Rr 5kO 0 12 0 155 0 18 Vrms RL DTMF Output Load 2 5V THD lt 23dB 5 kQ ACR Column Pre emphasis 2 5V Row group 0dB 1 2 3 dB 9 21st Jan 98 HOLTEK f HT9312 3 Series Test Conditions Symbol Parameter Min Typ Max Unit Conditions THD Tone Signal Dist
16. andard 3 579545MHz crystal or ceramic resonator to the X1 OSCILLATOR and X2 terminals can implement the oscillator function The X2 oscillator is turned off in the standby mode and is actuated whenever a keyboard entry is detected XMUTE is an NMOS open drain structure pulled to VSS during dialing signal transmission Otherwise it is an open circuit XMUTE is used to mute the speech circuit when transmitting the dial signal XMUTE O NMOSOUT This pin is used to monitor the status of the hook switch and its combination with HFI HDI can control the PO pin output to make or break the line ___ DEN HKS VDD On hook state PO low Except for HFI HDI hand free hold line control input other E functions are all disabled HKS VSS Off hook state PO high The chip is in the standby mode and ready to receive the key input This is a test pin It should be connected to VDD when in CMOS IN CMOS IN normal operation This pin is a CMOS output structure which by receiving the HKS and HFO HDO signals control the dialer to connect or disconnect the telephone line PO outputs a low to break line when HKS is high on hook CMOS OUT and HFO HDO is low PO outputs a high to make line when HKS is low off hook or HFO is high or HDO is high During the off hook state this pin also outputs the dialing pulse train in pulse mode dialing While in the tone mode this pin is always high 5 21st Jan 98 HO
17. ation Negative power supply CMOS IN Pull High CMOS IN OSCILLATOR Pull Low Absolute Maximum Ratings Supply Voltage 0 3V to 6V Input Voltage Vss 0 3 to Vpp40 3V Storage Temperature 50 to 125 Operating Temperature 20 to 75 Note Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device These are stress ratings only Functional operation of this device at these or any other conditions above those indicated in the operational sections of this specification is not implied and exposure to absolute maximum rating conditions for extended periods may affect device reliability 7 21st Jan 98 Electrical Characteristics Fosc 3 5795MHz Ta 25 C Test Conditions Symbol Parameter Min Typ Max Unit Conditions Operating Voltage 2 5 5 V Pulse Off hook 0 2 1 mA Ipp Operating Current 2 5V Tone entry e 5 E IsTB Standby Current 1 892980 1 uA VR Memory Retention Voltage 1 5 5 V In Memory Retention Current 1V On hook 0 1 0 2 pA VIL Input Low Voltage Vss 10 2Vpp V VIH Input High Voltage 0 8 VDD V Ixmo XMUTE Leakage Current 1 pA XMUTE Sink Current 2 5V VXMUTE 0
18. drift Selection Dialing specification selection merai N or Keyboard Various dialing specifications can be selected by Lock Selection operated lock adding resistors across keyboard matrix pins The allowable option resistor connections are Keypad Form FormA shown on the table 10 21st Jan 98 HOLTEK f ratio selection table HT9312 3 Series Pulse number selection table 12 M B Ratio This table shows pulse number selections for No 40 60 HT9312x HT9313x and HT9312xT The table Y 7 for HT9312xL HT9312xI and HT9312xLT HT es 33 3 66 6 9312xIT is used to select IDD lock function Flash function time duration selection table RK31 RK41 Pulse Number HT9312x xT series No NS N Flash Flash Func on Time Tr Yes No 10 N No No Control 600ms Yes No Yes Digit 600ms Yes No Digit 98ms Pulse number table Yes Yes Digit 300ms Keypad Output Pulse Number Normal New Sweden Digit Key Zealand Denmark HT9312xL xLT series N 10 N N 1 Flash Flash 1 1 9 2 Rais Fonction Time Tp 2 2 8 3 No No Control 600ms 3 3 4 No Yes Control 600ms 4 4 6 5 Yes No Control 98ms 5 5 5 6 Yes Yes Control 300ms 6 6 4 7 7 7 8 8 HT9313
19. e mode High Impedance xs H x 1222222772777 9 Tone mode High Impedance E EE Z H 20ms j 20ms Shk 19 21st Jan 98 wouter A Dialing with pause key HT9312 3 Series Pulse mode High Impedance KEY IN g d j Tos e 12 14 carrier x2 a TTT High Impedance 20ms 21st Jan 98 ore E Flash key operation HT9312 3 Series High Impedance gt 5 Pulse Tone operation High Impedance 4 F 22212 j le 20ms 21 21st Jan 98 One key redial operation High Impedance i 1 2 seca ble Tee gt id se C High Impedance M 4 pm i 1 1 DOUT ma EU ETT HU pea o x H Note D1 D3 3 D2 2 22 21st Jan 98 HT9312 3 Series Ring 1A bridge 1N4148 1N4148 A42 270k 54V O 1uF ZZ100uF 10 D VD HKS HT9312A AL AI HT9313A SPEECH 18 DIP NETWORK VSS MODE 3 58 2 resonator ts Rk for dialing signal option Refer to the functional description Unspecified transistors are of 8050 type 1uF capacitor between XMUTE and VSS GND is recommended Application C Application circuit 1 HOLTEK 21st Jan 98 23 HT9312 3 Series HOLTEK ion circuit 2
20. ged b with T RM content 01 02 Dn T Dn 1 Keyboard input or R P Dialing output D1 02 Dn Test Dn 1 Dm Pulse Tone RM Unchanged SAM Unchanged 14 RM content D1 D2 Dn Keyboard input or E P Dialing output D1 02 Dn RM Unchanged SAM Unchanged b with T RM content 01 D2 Dn Dn 1 Dm Keyboard input or R P Dialing output D1 02 Dn Dn 1 Dm RM Unchanged SAM Unchanged 21st Jan 98 One key redial Pulse mode Tone mode 8 without T a without T Keyboard input Keyboard input m R Dialing output 01 02 TRP Dialing output D1 02 Terk D1 D2 D1 D2 Dn Dn RM D1 02 RM D1 02 Dn SAM Unchanged SAM Unchanged b with T b with T Keyboard input Keyboard input is R Dialing output D1 02 Teor Dn 1 Dm Dialing output D1 02 Dn 1 Dm Pulse Tone Terk 01 02 Dn 1 D1 D2 Pulse Dn 1 Dm 01 D2 Dn Dn 1 SAM Unchanged RM D1 02 Dn T Dn 1 Dm SAM Unchanged Note If the dialing number exceeds 32 digits redialing is inhibited and PO VDD SA copy Pulse mode Tone mode a without T a without T Keyboard input Keyboard input Dialing output 01 02 Dn Dialing output D1 02 Dn D1
21. ortion 2 5V 5 80 28 dB Minimum Tone Duration Auto redial 82 5 ms Tirem Minimum Inter tone Auto redial __ 85 5 _ Pause THD Distortion dB 20 log V V1 V2 Vn V Vi Vh Vi Vh Row group and column group signals V1 V2 Vn Harmonic signals BW 300Hz 3500Hz Functional Description Keyboard matrix a 65 C1 C5 and R1 R4 form a keyboard matrix Together with a standard 4x5 keyboard the keyboard matrix is used for dialing entries In addition the keyboard matrix provides resis tor option for different dialing specification se lections The keyboard arrangement for each of the HT9312 3 series are shown in the Keyboard Information Tone frequency 12 14 the resistors are 330kO The resistor option Output Frequency Hz functions and the default specifications with Specified Actual Error out option resistors are listed below 697 699 0 29 Option Option Default R2 770 766 _0 52 Resistor Function No Resistor R3 852 847 0 59 Make Break 40 60 Ratio Selection 941 948 0 74 PET Flash Function Flash control er 1209 1215 030 and Flash Time function C2 1336 1332 0 30 Selection Flash time 600ms C3 1477 1472 0 34 Pause amp Note 96 Error does not contain the crystal Duration T 3 6s frequency
22. st Jan 98 DD lock operation by the keyboard 2 lock numbers 3 digits number at maximum Personal Lock No 1 Lock No 2 input operation a Personal code doesn t exist Stores Personal Code ST D1 02 D3 ST 0 Stores Lock No 1 ST D4 D5 D6 ST 1 Stores Lock No 2 ST 07 08 09 ST 2 b Personal code exist Changes Personal Code ST D1 D2 D3 ST 4 ST D4 05 D6 ST 0 NL WA Old personal code New personal code Changes Lock No 1 ST D1 D2 D3 ST ST D4 D5 D6 ST 1 a Personal code Lock No 1 Changes Lock No 2 ST D1 02 D3 ST ST 07 D8 09 ST 2 w MA Personal code Lock No 2 Changes Personal Code Lock No 1 and Lock No 2 at one time ST D1 D2 D3 ST ST D4 05 D6 ST 0 continued L a Old personal code New personal code ST 07 08 09 ST 1 ST 010 011 D12 ST 2 a Lock No 1 Lock No 2 Personal Lock No 1 Lock No 2 cancel operation Cancels Personal code ST D1 D2 D3 ST ST 0 Cancels Lock No 1 ST D1 02 D3 ST ST 1 Cancels Lock No 2 ST D1 D2 D3 ST ST 2 Temporary release both of the lock numbers Lock No 1 Lock No 2 ST 01 02 03 ST Dm Dm 1 2 DI Dn Personal code Note D1 D12 0 9 Dm Dm 1 Dm 2 0 9 DI Dn 0 9 4 Note RM Redial memory SAM Save dialing memory D1 D2 Dn 0 9 Dn 1 Dm 0 9 s 4 Dm 1 DI 0 9 4 DI 1 DK 0 9 18 21st Jan 98 Timing Diagrams Normal dialing Puls
23. t 5 Tip Off hook k O Ring 1A bridge 2 2 1N4148 TN4148 5 1V HT9312AT ALT AIT 20 DIP SPEECH NETWORK KT VSS MODE 3 58MHz resonator Rk for dialing signal option Refer to the functional description Unspecified transistors of 8050 type capacitor between XMUTE and VSS GND is recommended 21st Jan 98 27 HT9312 3 Series HOLTEK t6 lon Circul Applicat Off hook 22M2 1A bridge 4 100 2 2ko 1N4148 1N4148 HT9312BT BLT BIT 24 SDIP 3 58MHz resonator Rk for dialing signal option LH Refer to the functional description Unspecified transistors are of 8050 type 14F capacitor between XMUTE and VSS GND is recommended The HT381XX HT3810 series provides a melody during the hold period SPEECH NETWORK 21st Jan 98 28 HT9312 3 Series HOLTEK Application circuit 7 Tip O Ring 22M2 as wo p On hook 100 1A bridge 2 2 1N4148 TN4148 270 HT9312CT CLT CIT 22 SDIP 10pps Hp 3 semHz t 5 4 20 resonator N 8 39pF o Rk for dialing signal option Refer to the functional description Unspecified transistors are of 8050 type 1 capacitor between XMUTE and VSS GND is recommended LCD DRIVER see HT16XX data SPEECH NETWORK 21st Jan 98 29 HT
24. x series 8 8 2 9 Flash Flash 9 9 1 10 13 i Function Time Tr 0 10 10 i No No Control 600ms a T POT POT POT No Yes Digit 600ms Ignored Ignored Ignored Yes No Digit 86ms Yes Yes Digit 300ms The keyboard arrangement selection table Rksi Keypad Form Pause and P T duration selection table N Form A RK21 Tp sec see keyboard information No 8 6 8 6 Yes Form B see keyboard information Yes 2 1 11 21st Jan 98 HOLTEK f Hand free function operation Hand free function execution When HFO is low a rising edge triggers the HFI enabling the Hand free function HFO becomes high Reset Hand free function When HFO is high the Hand free function is enabled and can be reset by Off hook Applying a rising edge to HFI Changing the HDO pin from low to high Hand free function table Current State Next State HDO Input I HFI D L x H L x H H X H x L H L x H L x H H L H x X H Lie H Logic HIGH X Don t care 4 Rising edge L Logic LOW An Unchanged 4 Falling edge Hold line function operation Hold line function execution When HDO is low a falling edge triggers the HDI enabling the Hold line function HDO becomes high The XMUTE remains low when HDO is high Reset Hold line function When HDO is high the Hold line function is enabled and can be reset by
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