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SNC209S direct drive speech controller ver: 0.3 sept 20, 2007 1 ================= contents ================ 1. 1.1. 1. introduction........................................................................................................2 2. 2.2. 2. features ..................................................................................................................2 3. 3.3. 3. block diagram ....................................................................................................3 4. 4.4. 4. pin assignment.....................................................................................................3 5. 5.5. 5. function descriptions ...................................................................................4 5.1. o scillator ...............................................................................................................4 5.2. rom ..........................................................................................................................4 5.3. ram ..........................................................................................................................4 5.4. p ower d own m ode ..................................................................................................4 5.5. s ampling r ate c ounters .......................................................................................4 5.6. e vent m ark ..............................................................................................................5 5.7. i/o p orts ...................................................................................................................5 5.8. dac & pwm.............................................................................................................6 6. 6.6. 6. absolute maximum rating ..........................................................................8 7. 7.7. 7. electrical characteristics .....................................................................8 8. 8.8. 8. application circuit .........................................................................................9 disclaimer .....................................................................................................................11
SNC209S direct drive speech controller ver: 0.3 sept 20, 2007 2 1. 1.1. 1. introduction SNC209S is a single channel voice synthesizer ic with pwm direct drive circuit. it built-in a 4-bit tiny controller with six i/o pins. by programming through the tiny controller in SNC209S, user?s varied applications includi ng voice section combination, key trigger arrangement, output control, and other lo gic functions can be easily implemented. 2. 2.2. 2. features single power supply 2.4v ? 5.5v 60 seconds voice capacity are provided (@6khz sample rate ) built in a 4-bit tiny controller where p3.2, p3.3 can direct drive led (8ma for drivi ng, 16ma for sink) six i/o pins are provided (p3.0~p3.3, p2.0, p2.1) 48*4 bits ram are provided 184k*10 rom size are provided for voice data and pro gram maximum 16k program rom is provided readable rom code data built in a high quality speech synthesizer adaptive playing speed from 2.5k-20khz is provided built in a pwm direct drive circuit and a fixed curren t d/a output 8-level volume control for pwm direct drive output system clock: 2mhz low power detect
SNC209S direct drive speech controller ver: 0.3 sept 20, 2007 3 3. 3.3. 3. block diagram 4. 4.4. 4. pin assignment symbol i/o function description p33 ~ p30 i/o bit3 ~ bit0 of i/o port 3 p21 ~ p20 i/o bit1 ~ bit0 of i/o port 2 vdd p positive power supply gnd p negative power supply rst i reset pin (active high) osc o oscillator / crystal out buo1/vo o positive output of pwm or da output buo2 o negative output of pwm fuse i for test mode rom program/speech 184k 10 bits osc address pointers/ stack pwm voice synthesizer alu sram (48 nibbles) d/a timing generator sampling rate counter io3 / io2 timer
SNC209S direct drive speech controller ver: 0.3 sept 20, 2007 4 5. 5.5. 5. function descriptions 5.1. oscillator SNC209S accept rc type oscillator for system clock. the typ ical circuit diagram for oscillator is listed as follow. 5.2. rom SNC209S contains substantial 184k words (10-bit) interna l rom. program, voices and other data are shared with this same 184k words rom . 5.3. ram SNC209S contains 48 nibbles ram. the 48 nibbles ram ar e divided into three pages (page 0, page 1 and page 2, 16 nibble ram on each pa ge). in our programming structure, users can easily define and locate ram page in the program. for instance, users can use the instructions, pagen (n=0 to 2) to switch a nd indicate the ram page. besides, users can use direct mode, m0 ~ m15 in the data t ransfer type instructions (m15 is forbidden using for user in each page), to access a ll 16 nibbles of each page. 5.4. power down mode ?end? instruction will power down snc208 and enable i c to consume fewer current for power saving. (<3ua @vdd=3v and <5ua @vdd=5v) plea se be aware that when the power down mode is activated in snc208, any valid data transition (l h or h l) occurring on any io pins of p3 and p2 will lead snc208 back to normal operation mode. 5.5. sampling rate counters the playing rate can be adaptively set up among from the wide ranges of 2.5khz to 20khz. this feature makes voice close to its original source and yield the better voice quality. r osc vcc rc oscillator
SNC209S direct drive speech controller ver: 0.3 sept 20, 2007 5 5.6. event mark this is a new function for SNC209S, it allows user to ad d a special mark in wave data by the voice edit tool ?cooledit?. user can insert even t 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, it should be easily to control the i/o (such as led or motor) and other actions to synchronize with voice. 5.7. i/o ports p30~p33 and p20~p21 are i/o pins. any bit of them can be programmed as either input or output port individually. any valid data transition (h l or l h) of p30~p33 and p20~p21 can reactivate the chip when the chip is in power-down mode. i/o port configuration (p30~p33, p20~p21) note: (1) weak n-mos?s can serve as pull-low resistors. (2) the driving and sink current of p3.2 and p3.3 a re enhance to be 8ma/16ma. so user can direct to drive the led through those t wo i/o pins. port data port status to internal data bus read control pad weak
SNC209S direct drive speech controller ver: 0.3 sept 20, 2007 6 5.8. dac & pwm SNC209S is an advanced chip to be designed having two o ptimal methods to play out the voices. one is dac and the other is pwm. upon user ?s applications, user can select either dac or pwm in his design. please be aware that only one method can be activated at a time. dac : a 7-bit current type digital-to-analog converter is built-in SNC209S. the relationship between input digital data and output a nalog current signal is listed in the following table. also, the recommended applicatio n circuit is illustrated as follows. input data typical value of output current (ma) 0 0 1 3/127 ? n n*(3/127) ? 127 3 dac output vcc buo1/vo 1k
SNC209S direct drive speech controller ver: 0.3 sept 20, 2007 7 pwm : a pwm (pulse width modulation) circuit is built-in sn c209s. pwm can convert input digital data into pulse trains with suita ble different pulse width. the maximum resolution of pwm is 7 bits. two huge output stage circuits are designed in SNC209S. with this advanced circuit, the chip is capab le of driving speaker directly without external transistors. the recommende d application circuit is illustrated as follows. pwm output buo1/vo buo2
SNC209S direct drive speech controller ver: 0.3 sept 20, 2007 8 6. 6.6. 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. 7.7. 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 - 2.2 4.8 - u a v dd =3v , no load v dd =4.5v, no load operating current i opr - 300 1000 - u a v dd =3v , no load v dd =4.5v, no load input current of p30~p33, p20~p21 i ih - 3.0 10.0 u a v dd =3v,v in =3v drive current of p30~p31, p20~p21 i od - 5 - m a v dd =3v,v o =2.4v sink current of p30~p31, p20~p21 i os - 6 - m a v dd =3v,v o =0.4v drive current of p32, p33 i od - 11 - m a v dd =3v,v o =2.4v sink current of p32, p33 i os - 17 - m a v dd =3v,v o =0.4v drive current of buo1, buo2 i od 120 150 - m a vdd=3v,buo1=1.5v sink current of buo1, buo2 i os 120 150 - m a vdd=3v,buo1=1.5v oscillation freq. f osc - 2.0 - mhz v dd =3v
SNC209S direct drive speech controller ver: 0.3 sept 20, 2007 9 8. 8.8. 8. application circuit tr1 tr2 p30 p31 p32 p33 osc vo1 v d d 1k 8 0 5 0 r vdd vdd SNC209S rst vdd gnd 0.1uf tr3 tr4 p20 p21 d/a speaker output
SNC209S direct drive speech controller ver: 0.3 sept 20, 2007 10 amendment history version date description ver 0.1 may 2, 2007 first issue. ver 0.2 may 24, 2007 replace p4 with p2 ver 0.3 sept 20, 2007
SNC209S direct drive speech controller ver: 0.3 sept 20, 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 circui ts 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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