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SNC21341 1-ch h.q. speech controller ver1.0 october 23, 2007 1 ===================== contents ==================== = 1. introduction........................................................................................................... 3 2. features ..................................................................................................................... 3 3. pin assignment........................................................................................................ 4 4. block diagram ....................................................................................................... 4 5. function descriptions ...................................................................................... 5 5.1 o scillator .............................................................................................................. 5 5.2 rom ......................................................................................................................... 5 5.3 ram ......................................................................................................................... 5 5.4 p ower d own m ode ................................................................................................. 5 5.5 s ampling r ate c ounter ........................................................................................ 5 5.6 a uto r epeat f unction ........................................................................................... 5 5.7 i/o p orts .................................................................................................................. 5 5.8 ir f unction ............................................................................................................. 6 5.9 pwm io control .................................................................................................... 6 5.10 w atch d og t imer ................................................................................................... 6 5.11 p ush -p ull dac & c urrent da o utput ............................................................... 7 5.12 e vent m ark ............................................................................................................. 8 6. absolute maximum rating ............................................................................. 8 7. electrical characteristics ........................................................................ 8 8. application circuit ............................................................................................ 9 8.1 p ush -p ull dac output a pplication c ircuit ...................................................... 9 8.2 c urrent dac output a pplication c ircuit ....................................................... 10
SNC21341 1-ch h.q. speech controller ver1.0 october 23, 2007 2 amendent history version date description ver1.0 october 23, 2007 first issue
SNC21341 1-ch h.q. speech controller ver1.0 october 23, 2007 3 1. introduction SNC21341 is a one-channel voice synthesizer ic with push- pull direct drive circuit. it built-in a 4-bit tiny controller with four 4-bit i/o ports. by programming through the tiny controller in SNC21341, user?s varied applications includ ing voice section combination, key trigger arrangement, output control, and other logic functions can be easily implemented. 2. features single power supply 2.4v ? 5.5v system clock is 2mhz, the instruction cycle is 4us 340 seconds voice capacity are provided (@6khz sample rat e) built in a 4-bit tiny controller i/o port four 4-bit i/o ports p1, p2, p3 and p6 are provided the driving/sink current of p3.2 & p3.3 is up to 8ma/1 6ma the io pins p3.3 or p2.3 can be modulated with 38.5k hz carry signal to implement ir function. pwm output for io (p3.0~p3.3) 128*4 bits ram are provided maximum 16k program rom is provided 1024k*10 shared rom for voice data and program readable rom code data built-in one channel high quality speech synthesizer adaptive playing speed from 2.5k-20khz is provided automatic repetition support 5-bit adpcm and 10 bit pcm format built in an 8-level volume control push-pull dac circu it output, can directly connected to speaker for sound output 12 bit push-pull da output and 12 bit current dac ou tput event mark function supported low-voltage detect circuit watch dog timer reset function.
SNC21341 1-ch h.q. speech controller ver1.0 october 23, 2007 4 3. pin assignment symbol i/o function description p10~p13 i/o i/o port 1: io p20~p23 i/o i/o port 2: io p30~p33 i/o i/o port 3: io p60~p63 i/o i/o port 6: io rst i reset chip (active h) test1 i test pin test2 i test pin osc i oscillation component connection pin daon o push-pull output 1 daop o push-pull output 2 daco o current dac output vdd p positive power supply gnd p negative power supply 4. block diagram rom program/speech osc address pointers/ stack voice synthesizer alu sram (128 nibbles) timer push-pull circuit timing generator sampling rate counter io port 2 io port 1 watch dog timer io port 3 pwm io current dac circuit io port 6
SNC21341 1-ch h.q. speech controller ver1.0 october 23, 2007 5 5. function descriptions 5.1 oscillator system clock define 2mhz, the source provided by external resistor ring oscillator. 5.2 rom SNC21341 contains a substantial maximum 1024k words (10- bit) internal rom, which is shared by program and resource data. program, voice and data are shared within this same 1024k words rom. 5.3 ram SNC21341 contains maximum 128 nibble ram (128 x 4-bit s). the 128 nibble ram is divided into eight pages (page 0 to page 7, 16 nibbl e ram on each page). in our programming structure, users can use the instructions, page n (n=0 to 7) to switch and indicate the ram page. besides, users can use direct mode, m0 ~ m15 in the data transfer type instructions, to access all 16 nibbles of each page. 5.4 power down mode ?end? instruction makes the ic entering into stop mode will stop the system clock for power savings (<3ua @vdd=3v and <6ua @vdd=4.5v.) any valid data transition (l h or h l) occurring on any io pin can be used to start the system clock and return to normal operating mode. 5.5 sampling rate counter the unique sampling rate counter is designed in voice cha nnel to be able to play diverse voices at different sample playing rates. the pl aying rate can be adaptively set up among from the wide ranges of 2.5khz to 20khz. this architecture yields a high-quality voice synthesis that sounds very close to its o riginal source when played through the same amplifier and speaker circuitry. 5.6 auto repeat function a voice section can be repeated by the built-in special h ardware of SNC21341 without any software effort. the function activated by setting the corresponding bit of a control register. once the control register was setting, the channel will continue to play the voice section (the next section). 5.7 i/o ports there are four 4-bit i/o ports p1, p2, p3 and p6. an y i/o can be individually programmed as either input pull low or output. any valid data transition (h l or l h) of p1, p2, p3 and p6 can reactivate the chip when i t is in power-down stage.
SNC21341 1-ch h.q. speech controller ver1.0 october 23, 2007 6 i/o port configuration note: (1) weak n-mos can serve as pull-low resistor. (2) the driving/sink current of p3.3 & p3.2 is up to 8m a/16ma 5.8 ir function bit 3 of mode register is applied to control the ir fu nction. p33 can be modulated with 38.5khz square wave before sent out to p3.3 or p2.3 p in. p3.3 and p2.3 out is controlled by mode1.1. if mode1.1 set 1 ir is use p2.3, set ?0? is use p3.3. the ir signal can be achieved by this modulated signal. 5.9 pwm io control SNC21341 has support 4 pwm io (p30~p33). each i/o has 8 bit independent duty register, and the 8 bit register are compare with 8 bi ts counter. if set use pwm io function and internal counter start at 000h, the mappi ng i/o will set high. the 8 bits counter increment if the same duty-register, that will reset the mapping io pin. 5.10 watch dog timer SNC21341 built-in an internal wdt (watch dog timer). this watchdog timer would issue resets signal to this chip if it is not cleared before reaching terminal count (1 sec). the watchdog timer is enabled at reset and cannot be di sabled. port data port status to internal data bus read control pa d wea k
SNC21341 1-ch h.q. speech controller ver1.0 october 23, 2007 7 5.11 push-pull dac & current da output SNC21341 is an advanced chip to be designed having two optimal methods to play out the voices. one is dac and the other is push-pull d ac. upon user?s applications, user can select either dac or push-pull dac in his design. please be aware that only one method can be activated at the ti me. push-pull dac : an 8-level volume control push-pull dac circuit is bu ilt-in SNC21341. the maximum resolution of push-pull dac is 1 2 bits . two huge output stage circuits are designed in SNC21341. with this advance d circuit, the chip is capable of driving speaker directly without external tr ansistors. daon daop push-pull dac output dac : a 12-bit current type digital-to-analog converter i s built-in SNC21341 dac output vcc daco 1k
SNC21341 1-ch h.q. speech controller ver1.0 october 23, 2007 8 5.12 event mark this is a new function for SNC21341 series, it allows user to add a special mark in wave data by the voice edit tool ?cooledit?, ?goldw av?, ?soundforge?. user can insert event tags in anywhere of his wave file and can easy to get this special code to do his special action during voice playing. that means, i t should be easily to control the i/o (such as led or motor) and other actions to synchr onize with voice. 6. absolute maximum rating items symbol min max unit. supply voltage v dd -v -0.3 6.0 v input voltage v in v ss -0.3 v dd +0.3 v operating temperature t op 0 55.0 o c storage temperature t stg -55.0 125.0 o c 7. electrical characteristics item sym. min. typ. max. unit condition operating voltage v dd 2.4 3.0 5.5 v standby current i sby - 3.0 5.0 - u a v dd =3v, no load v dd =4.5v, no load operating current i opr - 300 - u a v dd =3v, no load input current of p1, p2, p3, p6 i ih - 3.0 - u a v dd =3v,v in =3v drive current of p1, p2, p3.0, p3.1, p6 i od 3 4 - m a v dd =3v,v o =2.4v sink current of p1, p2, p3.0, p3.1, p6 i os 4 6 - m a v dd =3v,v o =0.4v drive current of p3.2, p3.3 i od 6 8 - m a v dd =3v,v o =2.4v sink current of p3.2, p3.3 i os 10 16 - m a v dd =3v,v o =2.4v push-pull dac current i pp - 70 - m a vdd=3v, output 1k sin wave. push-pull dac current i pp - 100 - m a vdd=4.5v, ouput 1k sin wave. drive current of daco i od 3 m a vdd=3v,daco=0.7v oscillation freq. f osc - 2.0 - mhz v dd =3v
SNC21341 1-ch h.q. speech controller ver1.0 october 23, 2007 9 8. application circuit 8.1 push-pull dac output application circuit g n d tr1 tr2 tr3 tr4 tr5 tr6 p10 tr7 tr8 tr9 tr10 tr11 tr12 tr13 tr14 tr15 tr16 p11 p12 p13 p20 p21 p22 p23 p30 p31 p32 p33 vdd vdd rst daon daop s ss sn nn nc cc c2 22 21 11 13 33 34 44 41 11 1 osc p61 p62 p63 p60
SNC21341 1-ch h.q. speech controller ver1.0 october 23, 2007 10 8.2 current dac output application circuit g n d tr1 tr2 tr3 tr4 tr5 tr6 p10 tr7 tr8 tr9 tr10 tr11 tr12 tr13 tr14 tr15 tr16 p11 p12 p13 p20 p21 p22 p23 p30 p31 p32 p33 vdd vdd rst daco s ss sn nn nc cc c2 22 21 11 13 33 34 44 41 11 1 osc v d d 1k 8 0 5 0 p61 p62 p63 p60
SNC21341 1-ch h.q. speech controller ver1.0 october 23, 2007 11 disclaimer the information appearing in sonix web pages (?this p ublication?) is believed to be accurate. however, this publication could contain technical inaccuraci es or typographical errors. the reader should not assume that this publication is err or-free or that it will be suitable for any particular purpose. sonix makes no war ranty, express, statutory implied or by description in this publication or other documents which are referenced by or linked to this publication. in no event shall so nix be liable for any special, incidental, indirect or consequential damages of any kind , or any damages whatsoever, including, without limitation, those result ing from loss of use, data or profits, whether or not advised of the possibility of d amage, and on any theory of liability, arising out of or in connection with the use or performance of this publication or other documents which are referenced by or linked to this publication. this publication was developed for products offered in t aiwan. sonix may not offer the products discussed in this document in other countries. information is subject to change without notice. please contact sonix or its local representative for information on offerings available. integrated circuit s sold by sonix are covered by the warranty and patent indemnification provisions stip ulated in the terms of sale only. the application circuits illustrated in this document are for reference purposes only. sonix disclaims all warranties, including the warra nty of merchantability or fitness for any purpose. sonix reserves the right to halt production or alter the specifications and prices, and discontinue marketing the products listed at any time without notice. accordingly, the reader is cautioned to verify that the data sheets and other information in this publication are current before placing orders. products described herein are intended for use in normal commercial applications. applications involving unusual environmental or reliab ility requirements, e.g. military equipment or medical life support equipment, are specif ically not recommended without additional processing by sonix for such applicati on.

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