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SNC598 two channel direct drive speech controller 1 introduction SNC598 is a two-channel voice synthesizer ic with pwm direct drive circuit. it built-in a 4-bit tiny controller with one 4-bit input port, two 4-bit output ports and three 4-bit i/o ports. by programming through the ti ny controller in SNC598, user?s varied applications including voice section combi nation, key trigger arrangement, output control, and other logic functi ons can be easily implemented. 2 features single power supply 2.4v ? 5.5v 85 seconds voice capacity are provided(@6khz sample rate) built in a 4-bit tiny controller one 4-bit input port, two 4-bit output por ts and three 4-bit i/o ports are provided 128*4 bits ram are provided 256k*10 rom size are provided for voice data and program maximum 16k program rom is provided readable rom code data ir carrier signal is provided built in a high quality speech synthesizer adaptive playing speed from 2.5k-20khz is provided two independent voice channels (channel 1 + channel 2 buo1,buo2) built in a pwm direct drive circ uit and a fixed current d/a output system clock : 2mhz low power reset ver: 1.4 june 8, 2005 1
SNC598 two channel direct drive speech controller 3 block diagram io1 io2 io3 io4 io5 sampling rate counter u 2 timing generator d/a time r sram (128 nibbles) alu voice synthesizer io6 pwm address pointers/ stack osc rom program/speech 256k u 10 bits 4 pin assignment sy mbol i/o function description p13 ~ p10 i bit3 ~ bit0 of input port 1 p23 ~ p20 i/o bit3 ~ bit0 of i/o port 2 p33 ~ p30 i/o bit3 ~ bit0 of i/o port 3 p43 ~ p40 o bit3 ~ bit0 of output port 4 p53 ~ p50 o bit3 ~ bit0 of output port 5 p63 ~ p60 i/o bit3 ~ bit0 of i/o port 6 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 ver: 1.4 june 8, 2005 2
SNC598 two channel direct drive speech controller 5 function descriptions 5.1. oscillator SNC598 accept rc type oscillator for system cl ock. the typical circuit diagram for oscillator is listed as follow. r osc vcc rc oscillator 5.2. rom SNC598 contains substantial 256k words (10- bit) internal rom. program, voices and other data are shared with this same 256k words rom. 5.3. ram SNC598 contains 128 nibbles ram. the 128 nibbles ram are divided into eight pages (page 0 to page 7, 16 nibble ram on each page). 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 7) to switch and indicate the ram page. besides, users can use direct mode, m0 ~ m 15 in the data transfer type instructions, to access all 16 nibbles of each page. 5.4. power down mode ?end? instruction will power down SNC598 and enable ic to consume fewer current for power saving. (<3ua @vdd=3v and <5ua @vdd=5v) please be aware that when the power down mode is activated in SNC598, any valid data transition (l h or h l) occurring on any input port (p1) or io ports (p2, p3 and p6) will lead SNC598 back to normal operation mode. 5.5. sampling rate counters ver: 1.4 june 8, 2005 3 2 independent sampling rate counters are dedica ted to 2 individual voice channels to be able to play diverse voices at different sample playing rates. 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.
SNC598 two channel direct drive speech controller 5.6. i/o ports p1 is a 4-bit input port, p2 /p3/p6 are three 4-bit i/o ports and p4/p5 are two 4-bit output ports. any bit of p2, p3 and p6 can be programmed as either input or output port individually. any valid data transition (h ? l or l ? h) of p1, p2, p3 and p6 can reactivate the chip when the chip is in power-down mode. to internal data bus read control pad weak input port configuration (p10~p13) port data port status to internal data bus read control pad weak i/o port configuration (p20~ p23, p30~p33, p60~p63) ver: 1.4 june 8, 2005 4
SNC598 two channel direct drive speech controller pad weak port data port status output port configurat ion (p40~p43, p50~p53) note: all weak n-m o s?s can serve as pull-low resistors. 5.7. ir function p33 can be modulated with 38.5khz square wave before sent out to p33 pin. the ir signal can be achieved by this modulated signal. mode 38.5khz p33 pad "1" 5.8. dac & pwm SNC598 is an advanced chip to be designed having two optimal 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 SNC598. the relationship between input digital data and output analog current signal is listed in the following table. also, the reco mmended application circuit is illustrated as follows. ver: 1.4 june 8, 2005 5
SNC598 two channel direct drive speech controller input data typical value of output current (ma) 0 0 1 3 / 1 2 7 ? n n * ( 3 / 1 2 7 ) ? 1 2 7 3 vcc buo1/vo 1k dac output pwm : a pwm (pulse width modulation) circuit is built-in SNC598. pwm can convert input digital data into pulse trains with suitable different pulse width. the maximum resolution of pwm is 7 bits. two huge output stage circuits are designed in SNC598. with this advanced circuit, the chip is capable of driving speaker directly without external transistors. the recommended application circuit is illustrated as follows. buo1/vo buo2 pwm output ver: 1.4 june 8, 2005 6
SNC598 two channel direct drive speech controller 6 absolute maximum rating items sy mbol 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 5 5 . 0 o c storage temperature t stg - 5 5 . 0 1 2 5 . 0 o c 7 electrical characteristics item sy m. min. ty p. max. unit condition operating voltage v dd 2 . 4 3 . 0 5 . 5 v standby current i sby - 3 . 0 - u a v dd =3v, no load operating current i op r - 3 0 0 - u a v dd =3v, no load input current of p1, p2, p3, p6 i ih - 3 . 0 10.0 u a v dd =3v,v in =3v drive current of p2, p3, p4, p5, p6 i od - 4 - m a v dd =3v,v o =2.4v sink current of p2, p3, p4, p5, p6 i os - 6 - m a v dd =3v,v o =0.4v drive current of p2, p3, p4, p5, p6 i od - 5 - m a v dd =4.5v,v o =3.9v sink current of p2, p3, p4, p5, p6 i os - 9 - m a v dd =4.5v,v o =0.4v drive current of buo1 i od 1 0 0 120 - m a vdd=3v,buo1=1.5v sink current of buo1 i os 1 0 0 120 - m a vdd=3v,buo1=1.5v drive current of buo2 i od 1 0 0 120 - m a vdd=3v,buo2=1.5v sink current of buo2 i os 1 0 0 120 - m a vdd=3v,buo2=1.5v oscillation freq. f os c - 2 . 0 - mhz v dd =3v ir carrier frequency fir - 38.5 - khz f osc=2mhz ver: 1.4 june 8, 2005 7
SNC598 two channel direct drive speech controller 8 application circuit g n d tr1 tr 2 tr 3 tr 4 tr5 tr6 p1 0 tr7 tr8 tr 9 tr1 0 tr1 1 tr1 2 tr 13 tr 14 tr 15 tr 16 tr 1 7 tr1 8 tr 1 9 tr 2 0 tr 21 tr 2 2 tr 2 3 tr 2 4 tr 25 tr 26 tr 27 tr 28 tr 29 tr 30 tr 31 tr 32 p1 1 p1 2 p1 3 p2 0 p2 1 p2 2 p2 3 p4 0 p4 1 p4 2 p4 3 SNC598 p3 0 p3 1 p3 2 p3 3 os c vo 1 v d d 1 k 8 0 5 0 r vd d vd d rs t d/a speaker output 32 scan keys ver: 1.4 june 8, 2005 8
SNC598 two channel direct drive speech controller 9 bonding pad ( 0 . 0 0, 0 . 00 ) 1 2 3 4 5 6 78 9 1 0 1 1 12 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 13 p10 p1 1 p12 p13 p20 o s c g n d bu o1 v d d b u o 2 gn d p22 p23 p30 p31 p32 p33 p40 p41 gn d vd d p42 p43 p50 p51 p52 p53 p60 p61 p62 p63 p21 rs t note: the substrate must be connected to vss in pcb layout. ver: 1.4 june 8, 2005 9
SNC598 two channel direct drive speech controller disclaimer the information appearing in sonix web pages (?this publication?) is believed to be accurate. however, this publication could contain tec hnical inaccuracies or typographical errors. the reader should not assume that this pub lication is error-free or that it will be suitable for any particular purpose. sonix makes no warranty, express, statutory implied or by description in this publicat ion or other documents which are referenced by or linked to this publication. in no event shall sonix be liable for any special, incidental, indirect or consequential damages of any kind, or any damages whatsoever, including, without limitati on, those resulting from loss of us e, data or profit s, whether or not advised of the possibility of damage, and on any theory of li ability, 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 taiwan. sonix may not offer the products discussed in this document in other countries. information is subject to change without notice. please contact so nix or its local representative for information on offerings available. integrat ed circuits sold by sonix are covered by the warranty and patent indemnification provisions stipulated in the terms of sale only. the application circuits illustrated in this document are for reference purposes only. sonix disclaims all warranties, including the warranty of merchantability or fitness for any purp ose. sonix reserves the right to halt production or alter the specificati ons 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 informa tion in this publication are current before placing orders. products described herein are intended for use in normal commercial applications. applications involving unusual environmental or reliability requirem ents, e.g. military equipment or medical life support equipmen t, are specifically not recommended without additional processing by sonix for such application. ver: 1.4 june 8, 2005 10
SNC598 two channel direct drive speech controller ver: 1.4 june 8, 2005 11 green voice

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