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ht9320 series 22-memory tone/pulse dialer 1 july 21, 1999 features universal specification operating voltag0e: 2.0v~5.5v low standby current lowmemoryretentioncurrent:0.1 a(typ.) tone/pulse switchable interface with lcd driver 32 digits for redialing 32 digits for the sa memory dialing one-key redialing pause and p t key for pbx 3.58mhz crystal or ceramic resonator hand-free control hold-line control pause, p t can be saved for redialing on-hook store function keytone function lock function resistor options m/b ratio flash function and flash time pause and p t duration pulse number inter-digit pause time for 10pps memory number: 22 memories general description the ht9320 series tone/pulse dialers are cmos lsi for telecommunication systems. they are designed to meet various dialing spec - ifications through resistor option matrix. the ht9320 series are offered in six different versions. the different functions of the six ver- sions are listed in the selection table. the HT9320A, ht9320h versions provide the on-hook store function; the ht9320b version provides the lcd interface function; the ht9320k version provides the keytone func- tion; the ht9320l version provides both the lcd interface function and idd lock function. the six versions also supply the hold-line and hand-free functions, which are suitable for feature phone applications. ht9320 series provide sa, redial and 20 one-touch/two-touch memory dialing. if the keyboard includes m1~m20 keys it can be used as one-touch memory dialing. otherwise, it works as two-touch (page m1~m10) or three-touch(a page 0~9) memory dialing for speed dialing in either pulse or tone mode. patent number: 64097, 86474, 113235(r.o.c.), 5424740(u.s.a.)
selection table function memory dialing hold- line hand- free lcd interface flash function flash time (ms) pulse no. tone dura - tion (ms) inter- tone- pause (ms) m/b pin idd lock key- tone output on- hook store package part no. HT9320A sa, r m1~m20 control 600 n, n+1 10 n 82.5 85.5 28 dip digit 600/300/98 ht9320b sa, r m1~m20 control 600 n, n+1 10 n 82.5 85.5 28 dip digit 600/300/98 ht9320c sa, r m1~m20 control 600 n, n+1 10 n 82.5 85.5 22skdip digit 600/300/98 ht9320h sa, r m1~m20 digit 600/100 n 82.5 82.5 28 dip ht9320k sa, r m1~m20 control 600 n, n+1 10 n 82.5 85.5 28 dip digit 600/300/98 ht9320l sa, r m1~m20 control 600 n, n+1 10 n 82.5 85.5 28 dip digit 600/300/98 ht9320l-x the same as ht9320l, but the voltage polarity of the row group and the column group are reversed. pin assignment ht9320 2 july 21, 1999

block diagram ht9320 3 july 21, 1999 !"#$ % #%&'(!% %&!)* %&!)* !%'*!" + !#%'* , -!. , /!#%& (0()* "!&1 2 %*3'!* "345 ($ * 5&1 !% %&!)* !%0*'* !)-% !% #' #"4 #' '!% (*&#('
keyboard information HT9320A/b/c/k/l ht9320h memory dialing vs. keyboard form table dialing output one-touch memory keyboard two-touch memory keyboard three-touch memory keyboard m1~m10 m1 ~ m10 a a (a=1~9, 0) m11~m20 m11 ~ m20 page ma (ma=m1~m10) a page a (a=1~9, 0) ht9320 4 july 21, 1999

6 , 7

,2
6 , 7 , - ,2
6 , 7

6 ,

,2
6 , , ,2
6 , 7 ,
pin description pin name i/o internal connection description c1 ~c8 r1 ~r5 i/o cmos in/out these pins form a 5 8 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 ~c8 ) remains low and the row group (r1 ~r5 ) is set high for key input detection. for the ht9320l-x, the column group remains high and the row group is set low for key input detection. an inexpensive single contact 5 8 keyboard can be used as an input device. pressing a key connects a single column to a sin - gle row, and actuates the system oscillator that results in a di - aling 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 ar - rangement and to the functional description for dialing speci - fication selection. x1 i oscillator the system oscillator consists of an inverter, a bias resistor and the necessary load capacitor on chip. connecting a stan - dard 3.579545mhz crystal or ceramic resonator to the x1 and x2 terminals can implement the oscillator function. the oscil - lator is turned off in the standby mode, and is actuated when - ever a keyboard entry is detected. x2 o xmute o nmos out xmute is an nmos open drain structure pulled to vss dur- ing dialing signal transmission. otherwise, it is an open cir- cuit. xmute is used to mute the speech circuit when transmitting the dial signal. hks i cmos in 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 makeorbreaktheline. hks =vdd:on-hookstate(po =low).exceptforhfi/hdi (hand-free/hold-lineco ntrolinput),other functionsarealldisabled. hks=vss:off-hookstate(po =high).the chipisinthestand- bymodeandreadytoreceivethekeyinput. po o cmos out 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) 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. ht9320 5 july 21, 1999
pin name i/o internal connection description mode i/o 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 the tone mode. when the chips are in tone mode, switching to the pulse mode will also be recognized. dtmf o 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 cir - cuit. the load resistor should not be less than 5k . hdi i cmos in pull-high this pin is a schmitt trigger input structure. active low. ap - plying a negative going pulse to this pin can toggle the hdo out - put once. an external rc network is recommended for input debouncing. the pull-high resistance is 200k typ. hdo o cmos out the hdo is a cmos output structure. its output is toggle- con - trolled by a negative transition on hdi . when hdo is toggled high, po keeps high to hold the line. the hold function can be re - leased by setting hfo high or by an on-off hook operation or by another hdi input. the hdo pin can directly drive the ht3810 series melody generator to produce a hold-line background mel- ody. refer to the functional description for the hold-line func- tion. hfi i cmos in pull-low this pin is a schmitt trigger input structure. active high. ap- plying a positive going pulse to hfi can toggle the hfo once and hence control the hand-free function. an external rc network is recommended for input debouncing. the pull-low resistance of hfi is 200k typ. hfo o cmos out the hfo is a cmos output structure. its output is toggle- controlled by a positive transition on the 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 an on-off-hook oper - ation or by another hfi input or by setting hdo high. refer to the functional description for the hand-free function opera - tion. dout o nmos out nmos open drain output pin. it outputs the bcd code of the dialing digits to the lcd driver chip (ht16xx series) or c for dialing number display. refer to the functional description for the detailed timing. ht9320 6 july 21, 1999
pin name i/o internal connection description clock o nmos out nmos open drain output. when dialing, it outputs a series of pulse trains for dout data synchronization. dout data is valid at the falling edge of clock. vdd i positive power supply, 2.0v~5.5v for normal operation vss i negative power supply hst i cmos in pull-low (HT9320A) on-hook store enable input hst=vdd: on-hook store (HT9320A/h) hst=floating: off-hook store (HT9320A) hst=vss: off-hook store (ht9320h) the pull-low resistance is 200k typ. cmos in (ht9320h) m/b i cmos in pull-high (HT9320A) make/break ratio selection m/b =vss: 33.3/66.6 (HT9320A) m/b =floating: 40/60 (HT9320A) m/b =vdd: 33.3/66.6 (ht9320h) m/b =vss: 40/60 (ht9320h) the pull-high resistance is 200k typ. cmos in (ht9320h) kt o cmos out keytone output pin. outputs a 1.2khz tone carrier for 34ms each time a key is pressed in the pulse mode. approximate internal connection circuits ht9320 7 july 21, 1999 - - - - #""8"!. - #""85(95 - , : :
absolute maximum ratings supply voltage ................................ 0.3v to 6v storage temperature ................ 50 cto125 c input voltage .................. v ss 0.3 to v dd +0.3v operating temperature ............. 20 cto75 c note: these are stress ratings only. stresses exceeding the range specified under
absolute maxi - mum ratings
may cause substantial damage to the device. functional operation of this device at other conditions beyond those listed in the specification is not implied and prolonged expo - sure to extreme conditions may affect device reliability. electrical characteristics f osc =3.5795mhz, ta=25 c symbol parameter test conditions min. typ. max. unit v dd conditions v dd operating voltage 2 5.5 v i dd operating current 2.5v pulse off-hook keypad entry no load 0.2 1 ma tone 0.6 2 ma i stb standby current 1v on-hook, no load no entry 1 a v r memory retention voltage 1 5.5 v i r memory retention current 1v on-hook 0.1 0.2 a v il input low voltage v ss 0.2v dd v v ih input high voltage 0.8v dd v dd v i xmo xmute leakage current v xmute =12v no entry 1 a i olxm xmute sink current 2.5v v xmute =0.5v 1 ma i hks hks pin input current 2.5v v hks =2.5v 0.1 a r hfi hfi pull-low resistance 2.5v v hfi =2.5v 200 k r hdi hdi pull-high resistance 2.5v v hdi =0v 200 k r m/b m/b pull-high resistance 2.5v v m/b =0v 200 k r hst hst pull-low resistance 2.5v v hst =2.5v 200 k i oh1 keypad pin source current 2.5v v oh =0v 4 40 a i ol1 keypad pin sink current 2.5v v ol =2.5v 200 400 a i oh2 hfo pin source current 2.5v v oh =2v 1 ma i ol2 hfo pin sink current 2.5v v ol =0.5v 1 ma i oh3 hdo pin source current 2.5v v oh =2v 1 ma i ol3 hdo pin sink current 2.5v v ol =0.5v 1 ma i oh4 kt pin source current 2.5v v oh =2v 1 ma i ol4 kt pin sink current 2.5v v ol =0.5v 1 ma ht9320 8 july 21, 1999
symbol parameter test conditions min. typ. max. unit v dd conditions t fp pause time after flash control key 0.2 s digit key 1 s t rp pause time for one-key redialing one-key redialing 1 s t db key-in debounce time 20 ms t brk break time for one-key redialing one-key redialing 1.2 s f osc system frequency crystal=3.5795mhz 3.5759 3.5795 3.5831 mhz pulse mode electrical characteristics f osc =3.5795mhz, ta=25 c symbol parameter test conditions min. typ. max. unit v dd conditions i poh po output source current 2.5v v oh =2v 0.2 ma i pol po output sink current 2.5v v ol =0.5v 0.2 0.6 ma pr pulse rate mode pin is connected to v dd 10 pps mode pin is opened 20 m/b make/break ratio a resistor is linked between r2 and c1 (ht9320b/c/k/l) 33:66 % m/b =vss (HT9320A) m/b =vdd (ht9320h) no resistor is linked between r2 and c1 (ht9320b/c/k/l) 40:60 m/b =floating (HT9320A) m/b =vss (ht9320h) t pdp pre-digit-pause time m/b ratio=40:60 40 (10pps) 20 (20pps) ms m/b ratio=33:66 33 (10pps) 17 (20pps) ht9320 9 july 21, 1999
symbol parameter test conditions min. typ. max. unit v dd conditions t idp inter-digit-pause time pulse rate=10pps. no resistor is linked between r1 and c5 (HT9320A/b/c/k) 800 ms pulse rate=10pps (ht9320h/l) pulse rate=10pps. a resistor is linked between r1 and c5 (HT9320A/b/c/k) 400 pulse rate=20pps 500 t m pulse make duration a resistor is linked between r2 and c1 (ht9320b/c/k/l) 33 (10pps) 17 (20pps) ms m/b =vss (HT9320A) m/b =vdd (ht9320h) no resistor is linked between r2 and c1 (ht9320b/c/k/l) 40 (10pps) 20 (20pps) m/b =floating (HT9320A) m/b =vss (ht9320h) t b pulse break duration a resistor is linked between r2 and c1 (ht9320b/c/k/l) 66 (10pps) 33 (20pps) ms m/b =vss (HT9320A) m/b =vdd (ht9320h) no resistor is linked between r2 and c1 (ht9320b/c/k/l) 60 (10pps) 30 (20pps) m/b =floating (HT9320A) m/b =vss (ht9320h) t kt keytone duration pulse mode (ht9320k) 34 ms f ktc keytone carrier pulse mode (ht9320k) 1.2 khz tone mode electrical characteristics f osc =3.5795mhz, ta=25 c symbol parameter test conditions min. typ. max. unit v dd conditions v tdc dtmf output dc level 0.45v dd 0.7v dd v i tol dtmf sink current 2.5v v dtmf =0.5v 0.1 ma v tac dtmf output ac level row group, r l =5k 0.12 0.155 0.18 vrms r l dtmf output load 2.5v thd 23db 5 k a cr column pre-emphasis 2.5v row group=0db 1 2 3 db ht9320 10 july 21, 1999
symbol parameter test conditions min. typ. max. unit v dd conditions thd tone signal distortion 2.5v r l =5k 30 23 db t tmin minimum tone duration auto-redial 82.5 ms t itpm minimum inter-tone pause auto-redial 85.5 ms thd (distortion) (db) = 20 log ( v1 v2 vn / vi vh 22 2 2 2 ) vi, vh: row group and column group signals v1, v2, ... vn: harmonic signals (bw=300hz~3500hz) ht9320 11 july 21, 1999 functional description keyboard matrix c1 ~c8 and r1 ~r5 form a keyboard matrix. to - gether with a standard 5 8 keyboard, the key - board matrix is used for dialing entries. in addition, the keyboard matrix also provides resis - tor options for different dialing specification se - lections. the keyboard arrangement for the ht9320 series are shown in the keyboard in - formation . tone frequency tone name output frequency (hz) % error specified actual r2 697 699 +0.29% r3 770 766 0.52% r4 852 847 0.59% r5 941 948 +0.74% c1 1209 1215 +0.50% c2 1336 1332 0.30% c3 1477 1472 0.34% note: %errordoesnotcontainthecrystalfrequency drift dialing specification selection various dialing specifications can be selected by adding resistors across keyboard matrix pins. the allowable option resistor connections are shown on the table. all the resistors are 330k . the resistor option functions and the default specifications (with - outoptionresistors)arelistedbelow(HT9320A/ b/c/k/l). option resistor option function default (no resistor) r k12 (ht9320b/ c/k/l) ratio selection 40:60 r k13 flash function /time selection flash= control function flash time= 600ms r k14 r k21 pause & p t duration selection t p = 3.6s t p t = 3.6s r k31 pulse number selection n r k41 r k51 (HT9320A /b/c/k) inter-digit- pause time for 10pps 800ms
ht9320 12 july 21, 1999 option resistor option function default (no resistor) r k51 r k61 r k71 (ht9320l) international direct dialing lock selection normal dialing (unlock) m/b ratio selection table HT9320A m/b pin m/b ratio (%) vss 33.3:66.6 floating 40:60 ht9320b/c/k/l r k12 m/b ratio (%) no 40:60 yes 33.3:66.6 ht9320h m/b pin m/b ratio (%) vdd 33.3:66.6 vss 40:60 flash function/time (duration) selection table HT9320A/b/c/k/l r k13 r k14 flash function flash time (t f ) no no control 600ms no yes digit 600ms yes no digit 98ms yes yes digit 300ms ht9320h m/b pin flash function flash time (t f ) vss digit 600ms vdd digit 100ms pause and p t duration selection table HT9320A/b/c/k/l r k21 t p (sec) t p t (sec) no 3.6 3.6 yes 2 1 ht9320h t p (sec) t p t (sec) 3.6 3.6 pulse number selection table HT9320A/b/c/k/l r k31 r k41 pulse number no no n no yes n+1 yes no 10-n yes yes ht9320h pulse number n inter-digit-pause time for 10pps HT9320A/b/c/k r k51 inter-digit pause time no 800ms yes 400ms ht9320h/l inter-digit pause time 800ms
ht9320 13 july 21, 1999 pulse number table keypad output pulse number digit key n 10 n n+1 119 2 228 3 337 4 446 5 555 6 664 7 773 8 882 9 99110 01010 1 /t p tp tp t # ignored ignored ignored 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. key-in bcd code key-in bcd code 1 0001 8 1000 2 0010 9 1001 3 0011 0 1010 4 0100 /t 1101 5 0101 # 1100 6 0110 f 1011 7 0111 p 1110 on hook store (HT9320A/h) when the external power supply (2v~5.5v) is used and the hst pin is connected to vdd, the user can store dialing numbers to the memories (m1~m20) during on-hook state. on/off hook store selection table hst pin hook store mode vdd (HT9320A/h) on-hook store floating (HT9320A) off-hook store vss (ht9320h) off-hook store lock function (ht932l) this function aims to detect lock dialing num - bers to prevent from an unauthorized long dis - tance call. the dialing output of this chip is disabled if the first input key after on-off hook is the lock number when the lock function is en - abled. international direct dialing lock (idd lock) se - lection table r k51 r k61 r k71 lock function no no no normal dialing without lock function no no yes to lock 0 no yes to lock 0, 9 yes idd lock operation by the telephone keyboard. (see keyboard operation) note:

stands for
don t care
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
ht9320 14 july 21, 1999 hand-free function table 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: off-hook applying a falling edge to hdi changing the hfo pin from low to high hold-line function table 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 p t function and wait at p t duration in the pulse mode. on the other hand, the /t key executes the func- tion in the tone mode. (ht9320h) the key executes the tone output function in the tone mode. no response in the pulse mode. p t the key executes the p t function in the pulse mode. no response in the tone mode. # this is a dialing signal key for the tone mode only, no response in the pulse mode.

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!" # $$
ht9320 15 july 21, 1999 sa pressing this key can save the preceding dial - ing 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. f the flash key can be selected as a digit or as a control key by the option resistors r k13 &r k14. pressing the flash key will force the po pin to be
low
for the t f duration and is then fol - lowed by t fp (sec). t f can also be selected by r k13 ,r k14 . p pause key. the execution of this key can pause the output for the t p duration. t p can be selected by r k21 . r redial key. executes redialing as well as one-key redial function. r/p 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. st store key. the execution of this key actuates the store memory function with (or without) dialing output. during the dialing signal transmission, the st key is inhibited. a auto key. when this key is pressed before pressing any one of the digital keys (0~9) it executes the two-touch/ three-touch memory dialing function. page m11~m20 are represented by pressing the page key an.d the digital keys (0~9) or m1~m10. that is to say, a page digit key (0~9) or page m1~m10 executes m11~m20 memorydialing. m1~m20 one-touch memory dialing for speed-dialing in either pulse or tone mode.
keyboard operation the following operations are described under an on-off-hook or on-hook condition with the hand-free active condition. ht9320 16 july 21, 1999 -- #"4-$ !) ;3 <-. ('5 ! # '-7 (3"(%9-!#':#'=-- -- ->>>- % =---->>>-% , =- %&53%9) ;/ <-. ('5 -7 (3 "(% 9 -! # ': # '=-- -- ->>>- % -- --- % ? ->>>- $ =- -- ->>>- % --7 -- % ? ->>>- $ , =- %&53%9) !% #"4 / ! 3 *) -(% : # '=--- --- -->>>-- % ---7 --- % ? -->>> -- ! * $ 3 "-) (3 "(% 9 $ ;3 <-. ('5 ! # '-7 (3"(%9-!#':#'=-- -- ->>>- % =---->>>-% , =- %&53%9) ;/ <-. ('5 -7 (3 "(% 9 -! # ': # '=-- -- ->>>- % --7 -- % ? ->>>- $ =- -- ->>>- % --7 -- % ? ->>>- $ , =- %&53%9) --!%-$ !) /!3*)-(%:#' =-- --- -->>>-- % ;3 <-. ('5 ! # '-7 @- (3"(%9-!#':#'=-- -- ->>>- % =- %&53%9) , =- %&53%9) -& ! % ' % '=- -- ->>>- % ;/ <-. ('5 -7 (3 "(% 9 -! # ': # '=-- -- ->>>- % -- -- % ? ->>>- $ =- %&53%9) , =- %&53%9) -& ! % ' % '=- -- ->>>- % --7 -- % ? ->>>- $ (3"(%9-!#':#'=-- -- ->>>- % =- %&53%9) , =- %&53%9) -& ! % ' % '=- -- ->>>- % ;/ <-. ('5 -7 (3 "(% 9 -! # ': # '=-- -- ->>>- % --7 -- % ? ->>>- $ =- %&53%9) , =- %&53%9) -& ! % ' % '=- -- ->>>- % --7 -- % ? ->>>- $ -- #"4-$ !) --!%-$ !) /!3*)-(%:#'=--- -- ;3 <-. ('5 ! # '-7 @- /!3*)-(%:#'=--- #"4 !% -- )(3" ! ' =- 5 -$ 3 a ($ # $ -& 3 : 3 & (' -! b-'5 - -$ $ ! * -(4 - -) (9 ('4 >-+ 5 % -$ ! * -'5 3 % - -) (9 ('4 -3 * - % ' * ) @-'5 -4 (9 % 3 "-(4 '*3%4$ ('')-/#'-'5-*)(3"-b#%&'(!%-(4-(%5(/(')> / ! 3 *) -(% : # '=--- --- -->>>-- % ---7 --- % ? -->>> $ /!3*)-(%:#' =-- --- -->>>-- % /!3*)-(%:#'=--c-- ---!*-- -d /!3*)-(%:#'=--c-- ---!*-- -d ! ' =-b-'5 -) (3 "(% 9 -% # $ / *- a & )4--)(9('4@-*)(3"(%9-(4-(%5(/(')-3%)- e
ht9320 17 july 21, 1999 / ! 3 *) -(% : # '=--- -- -->>>-- % --7 --- % ? ->>>- $ - / ! 3 *) -(% : # '=--- -- -->>>-- % ---7 -- % ? ->>>- $ --, ;3 <-. ('5 ! # '-7 (3 "(% 9 -! # ': # '=-- -- ->>>- % -- -- - =---->>>-% , =- %&53%9) ;/ <-. ('5 -7 =- -- ->>>- % --7 -- % ? ->>>- $ , =- %&53%9) ;3 <-. ('5 ! # '-7 =---->>>-% , =- %&53%9) ;/ <-. ('5 -7 --!%-$ !) -- # "4 -$ ! ) #"4 -- -- -- ->>>- % - - #"4 (3 "(% 9 -! # ': # '=-- -- ->>>- % --7 - % ? ->>>- $ =- -- ->>>- % --7 -- % ? ->>>- $ , =- %&53%9) -- -- -- ->>>- % --7 -- % ? ->>>- $ #"4 !% (3"(%9-!#':#'=-- -- ->>>- %-- -- % ? ->>>- $ - !% -- %81 -*)(3" /!3*)-(%:#'=-- --- -->>>-- % ---- /!3*)-(%:#'=-- --- -->>>-- % ---- ;3 <-. ('5 ! # '-7 (3"(%9-!#':#'=-- -- ->>>- % =-- -- ->>>- % , =----->>>-% ;/ <-. ('5 -7 =-- -- ->>>- % --7 -- % ? ->>>- $ , =-- -- ->>>- % --7 -- % ? ->>>- $ ;3 <-. ('5 ! # '-7 (3"(%9-!#':#'=-- -- ->>>- % =-- -- ->>>- % , =----->>>-% ;/ <-. ('5 -7 (3 "(% 9 -! # ': # '=-- -- ->>>- % --7 --- % ? ->>>- $ =- -- ->>>- % --7 -- % ? ->>>- $ , =- -- ->>>- % --7 -- % ? ->>>- $ -- #"4-$ !) --!%-$ !) /!3*)-(%:#'=-- --- -- >>>-- % --- , (3 "(% 9 -! # ': # '=-- -- ->>>- % -- --- % ? ->>>- $ !% #"4 --,-&!: /!3*)-(%:#'=-- --- -- >>>-- % --- , (3"(%9-!#':#'=-- -- ->>>- %-- --- % ? ->>>- $ =- -- ->>>- % -- -- % ? ->>>- $ , =- %&53%9) -- 3 # 4 -- -->>>-- % #"4 (3 "(% 9 -! # ': # '=-- -- ->>>- % -- -- -- -- >>>-- % % ? ->>>- $ / ! 3 *) -(% : # '=--- -- -->>>-- % --7 -- % ? ->>>- $ --, !'=-5-$ 3a($ #$ -&3:3&(' -!b-'5- -$ $ !* -(4--)(9('4>-+ 5%-$ !*-'53%--)(9('4-:"#4-'5-f , f-1 3*-%'*)@-'5-,-b#%&'(!%-.(""-%!'-/-a&#')@-3%)-3""-'5-a(4'(%9-)3'3-(%-'5-430-$ $ !* . (""-%!'-/-&53%9)> / ! 3 *) -(% : # '=--- -- -->>>-- % --7 --- % ? ->>>- $ - /!3*)-(%:#' =--- -- -->>>-- % ---c-- ---! *-- -d--- % ? -->>>-- $ ! ' =-b-'5 -) (3 "(% 9 -% # $ / *- a & )4--)(9('4@-*)(3"(%9-(4-(%5(/(')-3%)- e
ht9320 18 july 21, 1999 ;3 <-. ('5 ! # '-7 (3"(%9-!#':#'=-- -- ->>>- % =-- %&53%9) , =-- %&53%9) ;/ <-. ('5 -7 =-- %&53%9) , =-- %&53%9) ;3 <-. ('5 ! # '-7 (3"(%9-!#':#'=-- -- ->>>- % =-- %&53%9) , =-- %&53%9) ;/ <-. ('5 -7 (3 "(% 9 -! # ': # '=-- -- ->>>- % --7 -- % ? ->>>- $ =- %&53%9) , =- %&53%9) , -& ! % ' % '=-- -- -->>>- % , -& ! % ' % '=-- -- ->>>- % --7 -- % ? ->>>- $ , -& ! % ' % '=-- -- ->>>- % , -& ! % ' % '=-- -- ->>>- % --7 -- % ? ->>>- $ -- #"4-$ !) --!%-$ !) (3 "(% 9 -! # ': # '=-- -- ->>>- % -- --- % ? ->>>- $ !% #"4 -- , -) (3 "(% 9 /!3*)-(%:#'=-- , /!3*)-(%:#'=-- , /!3*)-(%:#'=-- , /!3*)-(%:#'=-- , (3"(%9-!#':#'=- 3 =- -- ->>>- % =---->>>-% -- %8'!#&5-$ $ !* -4'!*-. ('5!#'-)(3"(%9-!#':#' , =-- %&53%9) (3 "(% 9 -! # ': # '=- -- ->>>- % - 3 =- -- ->>>- % =---->>>-% -- %8'!#&5-$ $ !* -4'!*-. ('5-)(3"(%9-!#':#' , =-- %&53%9) /!3*)-(%:# '=-- --- -->>>-- % --- --- ---- 3 (3"(%9-!#':#'=- 3=- -- ->>>- %-;3e/? @- e < =---->>>-% --5*8'!#&5-$ $ !* -4'!*-. ('5!#'-)(3"(%9-!#':#' ----; g < , =-- %&53%9) (3"(%9-!#':#'=- / =- -- ->>>- % =---->>>-% , =-- %&53%9) (3 "(% 9 -! # ': # '=- -- ->>>- % - / =- -- ->>>- % =---->>>-% , =-- %&53%9) -- $ ! * -4 '! * /!3*)-(%:# '=-- --- --- -->>>-- % --- --- 3 (3 "(% 9 -! # ': # '=- -- ->>>- % - 3=- -- ->>>- %-;3e/? @- e < =---->>>-% --5*8'!#&5-$ $ !* -4'!*-. ('5-)(3"(%9-!#':#' ----; g < , =-- %&53%9) --. !8'!#&5-$ $ !* -4'!*-. ('5-)(3"(%9-!#':#' ----; g < !'=- b-'5-)(3"(%9-%#$ /*-a&)4--)(9('4@-'5-$ $ !* -4'!*-(4-(%5(/(')> !. 0*@-(b-'5-)(3"(%9-%#$ /*-(4-%!'-$ !*-'53%--)(9('4-'5-$ $ !* -. (""-4'!*-3-$ 3a>-!b--)(9('4> 3e g @- /e g @-3eg @-/eg
@- 3=- -- ->>>- %-;3e/? @- e < /!3*)-(%:#'=-- --- --- -->>>-- %--- c---/ ---! *--- / --d /!3*)-(%:#'=-- --- --- --> >>-- % --- , 2 ---c---/ ---! *--- / --d ; g < -- . ! 8'! # & 5 -$ $ ! * -4 '! * -. ('5 ! # '-) (3 "(% 9 -! # ': # ' ; g < 3=- -- ->>>- %-;3e/? @- e < c---/ ---! *--- / --d , 2 ---c---/ ---! *--- / --d ; g < /!3*)-(%:#'=-- --- --- --> >>-- % --- , 2 ---c---/ ---! *--- / --d , 2 ---c---/ ---! *--- / --d /!3*)-(%:#'=-- --- -- >>>-- % --- --- /!3*)-(%:#'=-- --- -- >>>-- % --- --- /!3*)-(%:#'=-- --- -- >>>-- % --- ---
ht9320 19 july 21, 1999 =---->>>-% , =- %&53%9) -- "3 4 5 -3 4 -3 -) (9 ('3 "-1 /!3*)-(%:#'= --- -- -->>>-- % ---- ---- % ? -->>> ---------------------------- $ - (3"(%9-!#':#'=-- -- -- -- -- ->>>- %-- %?->>>- $ =- %&53%9) =- -- -- -- -- ->>>- % -- % ? ->>>- $ - -&!%'%'=- %?->>>- $ -& ! % ' % '=- -- ->>>- % , =- %&53%9) /!3*)-(%:#'=--- -- -- ---c- --!*---, - --- --d--c- --! *---, ----- --d (3 "(% 9 -! # ': # '=- -- ->>>- % - 3=- %&53%9) =---->>>-% -- %8'!#&5-$ $ !* -)(3"(%9-; g < , =-- %&53%9) 3 -& ! % ' % '=- -- ->>>- % /!3*)-(%:# '=--- 3 (3 "(% 9 -! # ': # '=- -- ->>>- % - /=- %&53%9) =---->>>-% --. !8'!#&5-$ $ !* -)(3"(%9-; g < , =-- %&53%9) / -& ! % ' % '=- -- ->>>- % /!3*)-(%:#'=---, - ---c--/ ----! *-- / -d (3 "(% 9 -! # ': # '=- -- ->>>- % - 3=- %&53%9)-;3e/? @- e < =---->>>-% --5*8'!#&5-$ $ !* -)(3"(%9-; g < , =-- %&53%9) -&!%'%'=- -- ->>>- % /!3*)-(%:#'=---, --- , 2 - -c-- / --! *---/ ---d -- "345-34-3-&!%'*!"-1 ;3 <- 5 -(% ' *0 % ( % '-1 =- %&53%9) , =- %&53%9) (3 "(% 9 -! # ': # '=-- -- -- -- -- % /!3*)-(%:#'=------ -- -->>>-- % ;/ <- 5 -b(*4 '-1 -- "3 4 5 -- 53(%-)(3"(%9 -- $ ! * -) (3 "(% 9 (3"(%9-!#':#'=-- -- ->>>- %-- -- -- % ? ->>> $ =- % ? ->>>- $ , =- %&53%9) /!3*)-(%:#'= --- -- -->>>-- % ---- ---- % ? -->>> ---------------------------- $ - (3"(%9-!#':#'=-- -- ->>>- %-- -- -- % ? ->>> $ ! ' =- =-/ * 3 1 -3 -b"3 4 5 -'($ ! ' =-3 e g @- 3 e g / e g @-/ e g
@- ! ' =-b-'5 -) (3 "(% 9 -% # $ / *- a & )4--)(9('4@-*)(3"(%9-(4-(%5(/(')-3%)- e
ht9320 20 july 21, 1999 g -e- g
$ --$ ?--$ ?-e- g
"->>>- % -e - g
@-7 @-6 !'= =- )(3"-$ $ !* , =- 30-)(3"(%9-$ $ !* - ->>>- % =- g
% ? ->>>- $ =- g
@-7 @-6 $ ? ->>>- =- g
@-7 @-6 ? ->>>- =- g
@-7 @-6 -- ! ' = -- *4!%3"!&1- !>!&1- !>-(%:#'-!:*3'(!% '!*4- *4!%3"- !)=-- -- -- -- -- --7-- '! * 4 - ! & 1 - ! > =-- -- -- -- -- --7 -- '! * 4 - ! & 1 - ! > =-- -- -- --
-- --7 -- 53%94- *4!%3"- !)=-- -- -- -- -- --6-- -- -- -- -- --7-- ; ")-:*4!%3"-&!)< ; . -:*4!%3"-&!)< 53%94-!&1- !>=-- -- -- -- -- --6-- -- -- -- -- --7-- ; *4!%3"-&!)< ;!&1- !>< 53%94-!&1- !>=-- -- -- -- -- --6-- -- -- --
-- --7-- ;!&1- !>< 53%94- *4!%3"- !)@-!&1- !>-3%)-!&1- !>-3'-!%-'($ ; *4!%3"-&!)< -- -- -- -- --6-- -- -- -- -- --7-- -;&!%'(%#)< ; ")-:*4!%3"-&!)< ; . -:*4!%3"-&!)< ;!&1- !>< ;!&1- !>< -- *4!%3"!&1- !>!&1- !>-&3%&"-!:*3'(!% -- -- --
-- --7 -- -- -- -- -- -- --7 -- 3%&"4- *4!%3"-&!)=-- -- -- -- -- --6-- --6--- 3 % & "4 - ! & 1 - ! > =-- -- -- -- -- --6 -- --6 --- 3 % & "4 - ! & 1 - ! > =-- -- -- -- -- --6 -- --6 --- --$ :!*3* -*"34-/!'5-!b-'5-"!&1-%#$ /*4-;!&1- !>@-!&1- !><= --------- -- -- -- -- --6 -- $ -- $ ? -- $ ? -- "->>>- % ; *4!%3"-&!)< ;3<- *4!%3"-&!)-)!4%h'-a(4' ;/<- *4!%3"-&!)-a(4' -- -"!&1-!:*3'(!%-/ -'5-1 /!3*)-;-"!&1-%#$ /*4@--)(9('4%#$ /*-3'-$ 3a($ #$ < ---;, - 1 -*4(4'!*-(4-&!%%&')-/'. %- -3%)- <
timing diagrams normal dialing pulse mode tone mode ht9320 21 july 21, 1999 i- 8 (95-$ :)3%& 8 8 >1 j-&3**(* $ 4 $ 4 (95-$ :)3%& i- $ 4 $ 4
dialing with pause key pulse mode tone mode ht9320 22 july 21, 1999 i- (95-$ :)3%& -? - 8 >1 j-&3**(* $ 4 (95-$ :)3%& i- $ 4
flash key operation pulse tone operation ht9320 23 july 21, 1999 i - (95-$ :)3%& $ 4 >1 j-&3**(* i- (95-$ :)3%& -? - - $ 4 7 >-1 j-&3**(*
one key redial operation clock & dout operating ht9320 24 july 21, 1999 ; -4 & < -;>-4&4< (95-$ :)3%& i- $ 4 !'=ee e e>1 j 3'3 (95-$ :)3%& -;$ 4< >1 j- 3**(* i- $ 4
application circuits application circuit 1 ht9320 25 july 21, 1999 ------------------ ::4 ::4 !% > j *4!%3'!* > !") -a- 3%)b* , ,
(: (%9 , -/*()9 1 1 , 7
6 , ,2
: 7- 1-(4-b!*-'5-)(3"(%9-4(9%3"-!:'(!% ---; b *-'! -'5 -b# % & '(! % 3 "-) 4 & *(: '(! % < 7- %4:&(b()-'*3%4(4'!*4-3*-!b- -' : 7 --, - -&3:3&('!*-/'. %- -3%)- -;2 <-(4-*&!$ $ %)) 7-5- -; -4*(4<-:*!0()4-3-$ "!) -)#*(%9-'5-5!")-:*(!)
g %85!!1 4'!* bb85!!1 4'!*

+
:
: >1 1 1 1 1 > >1 1 1 1 1 > > 1 >1 1 1 1 1 1 > >1 1 bb85!!1 %85!!1

application circuit 2 ht9320 26 july 21, 1999 ------------------ ::4 ::4 !% > j *4!%3'!*
> !") -a- 3%)b* , ,
(: (%9 , -/*()9 1 1 , 7
6 , ,2
: - ;4- -)3'3< 7- 1-(4-b!*-'5-)(3"(%9-4(9%3"-!:'(!% ---; b *-'! -'5 -b# % & '(! % 3 "-) 4 & *(: '(! % < 7- %4:&(b()-'*3%4(4'!*4-3*-!b- -' : 7 --, - -&3:3&('!*-/'. %- -3%)- -;2 <-(4-*&!$ $ %)) 7-5- -; -4*(4<-:*!0()4-3-$ "!) -)#*(%9-'5-5!")-:*(!)

+

:
: 1 1 >1 1 1 1 > >1 1 1 > 1 1 > 1 1 >1 1 1 1 1 > >1 1 bb85!!1 %85!!1

application circuit 3 ht9320 27 july 21, 1999 --- ---
------------ ::4 ::4 !%
> j *4!%3'!* > , ,
(: (%9 , -/*()9 1 1 , 7
6 , ,2 : 7- 1-(4-b!*-'5-)(3"(%9-4(9%3"-!:'(!% ---; b *-'! -'5 -b# % & '(! % 3 "-) 4 & *(: '(! % < 7- %4:&(b()-'*3%4(4'!*4-3*-!b- -' : 7 --, - -&3:3&('!*-/'. %- -3%)- -;2 <-(4-*&!$ $ %))

+
:
: >1 1 1 1 > 1 >1 > 1 >1 1 bb85!!1 %85!!1
application circuit 4 ht9320 28 july 21, 1999 ------------------ ::4 ::4 !% > j *4!%3'!*
> !") -a- 3%)b* , ,
(: (%9 , -/*()9 1 1 , 7
6 , ,2
: !!1-!bb !!1-!% 7- 1-(4-b!*-'5-)(3"(%9-4(9%3"-!:'(!% ---; b *-'! -'5 -b# % & '(! % 3 "-) 4 & *(: '(! % < 7- %4:&(b()-'*3%4(4'!*4-3*-!b- -' : 7 --, - -&3:3&('!*-/'. %- -3%)- -;2 <-(4-*&!$ $ %)) 7-5- -; -4*(4<-:*!0()4-3-$ "!) -)#*(%9-'5-5!")-:*(!) g %85!!1 4'!* bb85!!1 4'!*
+

:
: >1 1 1 1 1 >1 > 1 1 > 1 > 1 1 >1 1 1 1 1 1 1 > >1

application circuit 5 ht9320 29 july 21, 1999 ------------------ ::4 ::4 !% > j *4!%3'!* > !") -a- 3%)b* , ,
(: (%9 , -/*()9 1 1 , 7
6 , ,2
: 7- 1-(4-b!*-'5-)(3"(%9-4(9%3"-!:'(!% ---; b *-'! -'5 -b# % & '(! % 3 "-) 4 & *(: '(! % < 7- %4:&(b()-'*3%4(4'!*4-3*-!b- -' : 7 --, - -&3:3&('!*-/'. %- -3%)- -;2 <-(4-*&!$ $ %)) 7-5- -; -4*(4<-:*!0()4-3-$ "!) -)#*(%9-'5-5!")-:*(!) #jj* +

:
: > >1 1 1 1 1 >1 1+ 1 > 1 1 $ >$ 1 1+ >1 1 1 1 1 > 1 >1 bb85!!1 %85!!1

ht9320 30 july 21, 1999 copyright 1999 by holtek semiconductor inc. the information appearing in this data sheet is believed to be accurate at the time of publication. however, holtek assumes no responsibility arising from the use of the specifications described. the applications mentioned herein are used solely for the purpose of illustration and holtek makes no warranty or representation that such applications will be suitable without further modification, nor recommends the use of its products for application that may pres - ent a risk to human life due to malfunction or otherwise. holtek reserves the right to alter its products without prior notification. for the most up-to-date information, please visit our web site at http://www.holtek.com.tw. holtek semiconductor inc. (headquarters) no.3 creation rd. ii, science-based industrial park, hsinchu, taiwan, r.o.c. tel: 886-3-563-1999 fax: 886-3-563-1189 holtek semiconductor inc. (taipei office) 5f, no.576, sec.7 chung hsiao e. rd., taipei, taiwan, r.o.c. tel: 886-2-2782-9635 fax: 886-2-2782-9636 fax: 886-2-2782-7128 (international sales hotline) holtek microelectronics enterprises ltd. rm.711, tower 2, cheung sha wan plaza, 833 cheung sha wan rd., kowloon, hong kong tel: 852-2-745-8288 fax: 852-2-742-8657

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