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SNC26340 one channel speech controller ver: 1.7 october 14, 2009 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 ..........................................................................................................................6 5.4 p ower d own m ode ..................................................................................................6 5.5 s ampling r ate c ounter .........................................................................................6 5.6 i/o p orts ...................................................................................................................6 5.7 pwm o utput ............................................................................................................7 5.8 w atch d og t imer ....................................................................................................7 5.9 ir f unction ..............................................................................................................7 5.10 pwm io control .....................................................................................................7 6. absolute maximum rating ..............................................................................7 7. electrical characteristics .........................................................................8 8. application circuit .............................................................................................9 8.1 g eneral application ...............................................................................................9 8.2 m otor application ................................................................................................10
SNC26340 one channel speech controller ver: 1.7 october 14, 2009 2 amendent history version date description ver 1.0 nov. 6, 2008 first issue ver 1.1 nov. 17, 2008 revise cvdd & vddio order of ?motor application? ver 1.2 jan. 6, 2009 just revise version following with 4/8/12 io body ver 1.3 feb. 13, 2009 1. revise rosc=220k ohm in ap plication circuit part ver 1.4 may 6, 2009 1. revise frequency guarantee r ange in electrical characteristics according ic test flow ver 1.5 june 23, 2009 no modification, just revise version following with updating snc26500 io numbers. ver 1.6 july 23, 2009 revise system clock with 2.05 mhz (typical). ver 1.7 october 14, 2009 1. revise pwm output spec condition with buox=1/2 vdd (peak value), instead of 1khz sine wave
SNC26340 one channel speech controller ver: 1.7 october 14, 2009 3 1. introduction SNC26340 is a one-channel voice synthesizer ic with pwm direct drive circuit. it built in a 4-bit tiny controller with one 4-bit input port and two 4-bit i/o ports. by programming through the tiny controller in SNC26340, user?s varied applications including voice section combination, key trigger arrangem ent, output control, and other logic functions can be easily implemented. 2. features single power supply 2.4v ? 5.5v 336 seconds voice capacity are provided (@6khz sample rat e) built in a 4-bit tiny controller i/o port ? one 4-bit input port p1is provided. ? three 4-bit i/o ports p2, p3 and p6 are provided. ? the driving/sink current of p2 & p3 is up to 8ma/16ma ? the io pins p2.3 can be modulated with 38.5khz carry signal to implement ir function. ? pwm output for io (p2.0~p2.3, p3.0~p3.3) 128*4 bits ram are provided maximum 64k program rom is provided 688k*12 shared rom for voice data and program readable rom code data voice synthesizer: ? single channel speech output. ? support 4-bits sonix-asdpcm and 8-bit pcm algorithm adaptive playing speed from 2.5k-20khz is provided built in an pwm circuit output, can directly connected t o speaker for sound output. system clock: 2mhz event mark function supported low power detect. watch dog timer supported
SNC26340 one channel speech controller ver: 1.7 october 14, 2009 4 3. pin assignment symbol i/o function description p10~p13 i input port 1 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 rosc i oscillation component connection pin buo1 o pwm output 1 buo2 o pwm output 2 rst i rst=1 reset chip (active h) cvdd i positive power supply for cpu cgnd i negative power supply for cpu vddio i positive power supply for i/o gndio i negative power supply for i/o test i test pin 4. block diagram rom program/speech 688k 12 bits osc address pointers/ stack voice synthesizer alu sram (128 nibbles) timer pwm circuit timing generator sampling rate counter io port 3 io port 2 watch dog timer pwm io input port 1 io port 6
SNC26340 one channel speech controller ver: 1.7 october 14, 2009 5 5. function descriptions 5.1 oscillator SNC26340 accepts rc type oscillator for system clock. the ty pical circuit diagram for oscillator is listed as follows. 5.2 rom SNC26340 contains a substantial 688k words (12-bit) inte rnal rom, which is shared by program and resource data. program, voice and data are shared within this same 688k words rom. r osc vcc rc oscillator
SNC26340 one channel speech controller ver: 1.7 october 14, 2009 6 5.3 ram SNC26340 contains 128 nibble ram (128 x 4-bits). the 128 nibble ram is divided into two pages (page 0, 64 nibbles ; page1, 16 nibble s ram). in our programming structure, users can use the instructions, page n (n=0 or 1) to switch and indicate the ram page. besides, users can use direct mode, m0 ~ m63 i n the data transfer type instructions, to access first 64 nibbles of page0 and the la st 64 nibbles of page1. 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. th is 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 i/o ports there are one 4-bit input port p1 and two 4-bit i/o ports p2 and p3. any i/o can be individually programmed as either input pull low or output. any valid data transition (h l|l h) of p1, p2 and p3 can reactivate the chip when it is in power-down stage. i/o port configuration note: (1) weak n-mos can serve as pull-low resistor. (2) the driving/sink current of p2 & p3 is up to 8ma/16 ma port data port status to internal data bus read control pad weak
SNC26340 one channel speech controller ver: 1.7 october 14, 2009 7 5.7 pwm output an pwm circuit is built-in SNC26340. the maximum resolu tion of pwm is 8 bits . two huge output stage circuits are designed in SNC26340. with this advanced circuit, the chip is capable of driving speaker directly wi thout external transistors. buo1 buo2 pwm output 5.8 watch dog timer SNC26340 built an internal wdt (watch dog timer). th is watchdog timer would issue resets signal to this chip if it is not cleared before reaching terminal count (128 ms). the watchdog timer is enabled at reset and cannot b e disabled. 5.9 ir function p23 can be modulated with 38.5khz square wave before sent out to p23 pin. the ir signal can be achieved by this modulated signal. 5.10 pwm io control SNC26340 has support 8 pwm io (p20~p23, p30~p33). each i/o has 8 bit independent duty register, and the 8 bit register are compare with 8 bits counter. if set use pwm io function and internal counter start at 000h, the mapping i/o will set high. the 8 bits counter increment if the same duty register, that will reset the mapping io pin. 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
SNC26340 one channel speech controller ver: 1.7 october 14, 2009 8 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 6.0 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 p6 i od 3 4 - m a v dd =3v,v o =2.4v sink current of p6 i os 4 6 - m a v dd =3v,v o =2.4v drive current of p2, p3 i od 6 8 - m a v dd =3v,v o =2.4v sink current of p2, p3 i os 10 16 - m a v dd =3v,v o =2.4v pwm current i pwm - 240 - m a vdd=3v, buox=1.5v pwm current i pwm - 310 - m a vdd=4.5v, buox=2.25v oscillation freq. f osc 1.98 2.05 2.12 mhz v dd =3v, temp.=25 o c @rosc = 220 kohm min : -3% max : +3%
SNC26340 one channel speech controller ver: 1.7 october 14, 2009 9 8. application circuit 8.1 general application + - battery box io3 io4 io5 io1 io2 it is suggested to add a capacitor (c1), 104, betwe en vdd with gnd to keep power stable with general application. and this cap acitor is strongly suggested to be as close to the chip as possible.
SNC26340 one channel speech controller ver: 1.7 october 14, 2009 10 8.2 motor application + separate cpu power path with power path of large current application battery box separate cpu gnd with large current application gnd io1 8050 8050 io2 io3 io4 io5 there are some suggestions about pcb layout when us er use snc26000 series ic with motor applications. (1) the capacitor c1 (104) c2 (104)is strongly suggested to be as close to the chip as possible. (2) it had better let osc components (r) get close to i c chip. (3) osc components had better get far away large curre nt applications. (4) separate ic power path with large current applica tion power path to avoid affect ic working by power drop from large current applicatio n. (5) r2 (10 ? )separate vddio and cvdd. (6) let power cable thicker, especially for large current application. (7) c3 and c4 (104) are connected at the positive poi nt and negative point of the motor.
SNC26340 one channel speech controller ver: 1.7 october 14, 2009 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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