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SNC88340 24 - channel midi/speech controller ver: 1. 6 sep. 8 , 2006 1 ================== contents ================= 1 introduction ................................ ................................ ................................ ......................... 3 2 features ................................ ................................ ................................ ................................ ... 3 3 pin assignment ................................ ................................ ................................ ...................... 4 4 block diagram ................................ ................................ ................................ ..................... 5 5 function description ................................ ................................ ................................ ....... 5 5.1. o sci llator ................................ ................................ ................................ ................................ 5 5.2. rom ................................ ................................ ................................ ................................ ........... 6 5.3. ram ................................ ................................ ................................ ................................ ........... 6 5.4. p ower d own m ode ................................ ................................ ................................ .................. 6 5.5. ir f unction ................................ ................................ ................................ ............................... 7 5.6. i/o p orts ................................ ................................ ................................ ................................ ... 7 5.7. s ampling r ate c ounters ................................ ................................ ................................ ........ 8 5.8. a uto r epetition ................................ ................................ ................................ ....................... 8 5.9. v oice s ynthesizer ................................ ................................ ................................ ................... 8 5.10. m usic s ynthesizer ................................ ................................ ................................ ................... 8 5.11. dac ................................ ................................ ................................ ................................ ........... 9 6 application circuit ................................ ................................ ................................ ......... 10 7 absolute maximum rat ing ................................ ................................ .......................... 13 8 electrical character istics ................................ ................................ ..................... 13
SNC88340 24 - channel midi/speech controller ver: 1. 6 sep. 8 , 2006 2 amendent history version date description ver 1.0 october 07, 2004 first issue ver 1.1 november 12, 2004 modify application circuit. ver 1.2 march 21 , 2005 1. oscillator r - type is ?no connect?. page5 2. modify application circuit. (low clk mode, 32768, r - type, xin and xout no connect) page10 3. modify electric characteristic (max - >typical) page12 4. modify i/o circuit in page7 ver1.3 june 30,2005 1. modify appl ication circuit in low clk(rc mode) r=91k, c=200pf 2. in application circuit add r=100 (direct key) in page10 3. modify chapter 5.1 oscillator about rosc mode has to let xin connect r=51k and c=200pf to gnd. ver1.4 september 5,2005 1. remove chapter 5.1 hig h clock rc mode. 2. remove chapter 6 application circuit rc mode. ver1.5 november 18,2005 1. modify application circuit add a diode between ?vdd? and ?vddvr? @4.5v. 2. modify application circuit add r=100 in each input pin (direct key). ver1.6 september ,8,2006 1. ad d high clock rc mode in oscillator functional description (chap 5.1) 2. add high clock rc mode in application circuit 3. removed application circuit r=1 0 0 in each input pin (direct key)
SNC88340 24 - channel midi/speech controller ver: 1. 6 sep. 8 , 2006 3 1 introduction the SNC88340 is a single chip 24 - channel midi compatible w ave - table/voice synthesizer. equipped with a powerful 8 - bit controller and 24 i/o pins, it provides a low - cost midi sound system solution. it?s low power consumption and operating range makes it ideal for all battery operated devices using midi or voice sy nthesis. 2 features ? single power supply 2.4v ? 5.5v ? powerful built - in 8 - bit controller ? three 8 - bit i/o ports ? 640*8 bits ram ? maximum 64k program rom ? 1m*12 shared rom for program and voice data ? readable rom code data ? 24 - voice polyphony through a high - qual ity speech synthesizer ? mark event supported in both wave and melody. ? individual adaptive playing speed from 4k - 64khz for all 24 channels ? automatic repetition for each channel ? volume modulation controlled by embedded multiplier ? two digital mixers with satur ation control ? two built - in 10 - bit current mode da converters ? analog direct drive speaker circuit. ? system clock: 16.384m hz ( rc - type or crystal option) ? 1 mips cpu power free to user ? low voltage reset
SNC88340 24 - channel midi/speech controller ver: 1. 6 sep. 8 , 2006 4 3 pin assignment symbol i/o function description p0 0 ~ p07 i/o bit7 ~ bit0 of i/o port 0 p10 ~ p17 i/o bit7 ~ bit0 of i/o port 1 p20 ~ p27 i/o bit7 ~ bit0 of i/o port 2 vddvr p positive power supply for rosc gndvr p negative power supply for rosc vddpp p positive power supply for direct drive gndpp p negative power supply for direct drive cvdd p positive power supply for internal circuit vdd p positive power supply for i/o gnd p negative power supply regout p 3v regulator output rst i chip reset (active low) xin i high clock crystal in xout o h igh clock crystal out lxin i low clock crystal in lxout o low clock crystal out cksel i clock type select ?vdd? ? rc oscillator ?gnd? ? crystal testm i test pin vo1 o da1 output vo2 o da2 output bn0 o direct drive negative output bp0 o direct drive positive output
SNC88340 24 - channel midi/speech controller ver: 1. 6 sep. 8 , 2006 5 4 block diagram 5 function description 5.1. oscillator cksel (clock select) input pin of the snc88 3 40 selects between crystal oscillator/ceramic resonator or rc type oscillators as system clock. 16.384mhz xin cksel xout rc oscillator crystal / resonator vdd xin cksel xout 20pf 20pf gnd nc nc notice: for rc oscillator, keep xout and xin as ?no connect?. rom program/speech/melody/instrument waveform 1m ? 12 bits osc address pointers/ stack io2 voice synth esizer alu sram (640 bytes) 10bit d/a x 2 timing generator io1 io 0 music synthesizer sampling rate counter timer direct drive
SNC88340 24 - channel midi/speech controller ver: 1. 6 sep. 8 , 2006 6 5.2. rom SNC88340 contains a substantial 1m x 12 - bit word internal rom which is shared by program and resource data. program, voice, melodies, data, and instrument w aveforms are shared within this same 1m words rom. 5.3. ram SNC88340 contains 640 bytes ram (640 x 8 - bits). the 640 byte ram is divided into five pages (page0, 1, 2, 3 and 4, 128 bytes ram for each page). the rambk register is used to switch to a specific ra m page. for example, declaring org 0x180 usemem ds 1 would locate one byte memory for ? usemem ? at bank 3 . setting ?rambk = 3 ?in a program would switch to bank 3 of ram. reserved for system 0x027f 0x0000 0x0100 0x00ff : : 0x007f 0x0080 : : : : 0x017f 0x0180 free for user 0x01ff : : 0x0200 : : 5.4. power down mode entering the ic into stop mode will stop the system clock for power savings (<3ua @vdd=3v and <6ua @vdd=4.5v). any transition (l ? h or h ? l) on any i/o pin or rtc (real - time clock) can be used to start the system clock and return to normal operating mode.
SNC88340 24 - channel midi/speech controller ver: 1. 6 sep. 8 , 2006 7 5.5. ir function when ir is enabled, a 38.5khz square wave is gated with p27. the 38.5khz ir signal is present at the pin when p27 is set to ?1?. 5.6. i/o ports there are three 8 - bit i/o ports p0, p1, and p2. any i/o can be individually programmed as either input or output. when i/o is set to input, any valid data transition (h ? l or l ? h) of each i/o port can wake - up the chip from power - down mode. i/o port configuration note: weak n - mos?s can serve as pull - low resistors. i r e n 3 8 . 5 k h z p 2 7 p a d " 1 " p o r t d a t a p o r t s t a t u s t o i n t e r n a l d a t a b u s r e a d c o n t r o l p a d w e a k
SNC88340 24 - channel midi/speech controller ver: 1. 6 sep. 8 , 2006 8 5.7. sampling rate counters each voice c hannel of 24 is equipped with an independent sampling rate counter to allow individual sample rate play back per channel. channel sample rate play back can be dynamically set from 4khz to 64khz. each sampling rate counter is updated on a period of 0.125u s. this architecture yields a high - quality music/voice synthesis that sounds very close to its original source when played through the same amplifier and speaker circuitry. 5.8. auto repetition each voice channel of 24 is equipped with a hardware auto repea t function. auto repeat functions are normally used to implement sustain in instrument synthesis but can even be used to repeat any voice data of arbitrary length. 5.9. voice synthesizer the major function of voice synthesizer is to fetch wave data from rom and synthesize into voice. each voice channel of 24 is equipped with an individual volume setting. 5.10. music synthesizer the SNC88340 has a separate built in hardware music synthesizer for playing midi or melody sequences. compatible with the midi stream f ormat, sequencer note resolution is 480 ticks per quarter - note (tpqn) with tempo range settings from 16 - 400 beats per minute (bpm). music synthesizer tick counter tempo counter midi command interprete r voice synthesizer
SNC88340 24 - channel midi/speech controller ver: 1. 6 sep. 8 , 2006 9 5.11. dac two 10 - bit current type digital - to - analog converters are built - in SNC88340. the rel ationship between input digital data and output analog current signal is listed in the following table. input data typical value of output current (ma) 0 0 1 3/1023 ? n n*(3/1023) ? 1023 3 recommended application circuits are illustrated below . vo1 vo2 vcc 1k vo1 vcc 1k vcc 1k vo2 two speaker application single speaker application
SNC88340 24 - channel midi/speech controller ver: 1. 6 sep. 8 , 2006 10 6 application circuit ? power supply: 3.0v ? system clock: rosc with calibration or rtc function ? low clock: 32768 ? voice output: direct drive output snc 88040 vddvr vdd vddpp regout cvdd xin rst vdd xout cksel testm p 00 p 01 p 02 p 03 p 04 p 05 p 06 p 07 p 10 p 11 p 12 p 13 vo 1 bn 0 bp 0 gnd gndpp vdd 0 . 1 uf vdd 51 k p 14 p 15 p 16 p 17 gndvr 0 . 1 uf vdd 10 uf 10 10 vo 2 p 20 p 21 p 22 p 23 p 25 p 26 p 27 p 24 vdd 3 2 7 6 8 20 pf 20 pf lxin lxout vdd notice: if system clock is rosc, please leave xout and xin as ?no connect?.
SNC88340 24 - channel midi/speech controller ver: 1. 6 sep. 8 , 2006 11 ? power supply: 4.5v ? system clock: rosc with calibration or rtc function ? low clock: r - type ? voice output: da output with stereo snc 88040 vddvr vdd vddpp regout cvdd rst vdd cksel testm p 00 p 01 p 02 p 03 p 04 p 05 p 06 p 07 p 10 p 11 p 12 p 13 vo 1 bn 0 bp 0 gnd gndpp vdd 0 . 1 uf 4 . 7 uf 51 k p 14 p 15 p 16 p 17 gndvr 0 . 1 uf vdd 10 uf 10 10 vo 2 p 20 p 21 p 22 p 23 p 25 p 26 p 27 p 24 lxin lxout xin xout vdd vdd 1 k vdd 1 k vdd 91 k 200 pf 100 vdd notice: if sy stem clock is rosc, please leave xout and xin as ?no connect?.
SNC88340 24 - channel midi/speech controller ver: 1. 6 sep. 8 , 2006 12 ? power supply: 4.5v ? system clock: 16.384m crystal ? voice output: da output snc 88340 vdd 1 k vddvr vdd vddpp regout cvdd rst vdd cksel testm p 00 p 01 p 02 p 03 p 04 p 05 p 06 p 07 p 10 p 11 p 12 p 13 vo 1 bn 0 bp 0 gnd gndpp 0 . 1 uf 4 . 7 uf 51 k p 14 p 15 p 16 p 17 gndvr 0 . 1 uf vdd 10 uf 10 10 vo 2 p 20 p 21 p 22 p 23 p 25 p 26 p 27 p 24 lxin lxout 1 6 . 3 8 4 m h z 2 0 p f 2 0 p f xin xout vdd vdd
SNC88340 24 - channel midi/speech controller ver: 1. 6 sep. 8 , 2006 13 7 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 8 electrical characteristics item sym. min. typ. max. unit condition operating voltage v dd 2.4 - 5.5 v standby current i sby - 3 5 - u a v dd =3v v dd =4.5v operating current (push - pull turn on) i opr - 6 12 - ma v dd =3v, no load v dd =4.5v, no load operating current (push - pull turn off) i opr - 4 5 - ma v dd =3v, no load v dd =4.5v, no load input pull low impedance of p0~p2 ri - 0.8m - v dd =3v i/o port drive current i od - - 4 8 - - m a v dd =3v, v o =2.6v v dd =5v, v o =4.2v i/o port sink current i os - - 6 10 - - m a v dd =3v, v o =0.4v v dd =5v, v o =0.8v d/a output current i vo 2 2 3 3 4 4 m a v dd =3v, v o =0.7v v dd =5v, v o =0.7v push - pull current i pp - 7 0 - m a vdd=3v, output 1khz sin wave. push - pull current i pp - 10 0 - m a vdd= 4.5 v, ouput 1khz sin wave. ir carrier frequency fir - 38.5 - khz
SNC88340 24 - channel midi/speech controller ver: 1. 6 sep. 8 , 2006 14 disclaimer the information appearing in sonix web pages (?this publication?) is believed to be accurate. how ever, this publication could contain technical inaccuracies or typographical errors. the reader should not assume that this publication is error - free or that it will be suitable for any particular purpose. sonix makes no warranty, express, statutory impli ed or by description in this publication 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, inc luding, without limitation, those resulting from loss of use, data or profits, whether or not advised of the possibility of damage, and on any theory of liability, arising out of or in connection with the use or performance of this publication or other doc uments 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 sonix or its local representative for information on offerings available. integrated circuits sold by sonix are covered by the warranty and patent indemnification provisions stipulated in the terms of sale only. the application circuits il lustrated in this document are for reference purposes only. sonix disclaims all warranties, including the warranty of merchantability or fitness for any purpose. sonix reserves the right to halt production or alter the specifications and prices, and disc ontinue 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 u se in normal commercial applications. applications involving unusual environmental or reliability requirements, e.g. military equipment or medical life support equipment, are specifically not recommended without additional processing by sonix for such appl ication.

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