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snc88 040 24 - channel midi/speech controller ver: 1. 5 sep 08 , 200 6 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
snc88 040 24 - channel midi/speech controller ver: 1. 5 sep 08 , 200 6 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 page9 ver1.4 november 1 8 ,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) . ver1.5 september ,8,2006 1. removed application circuit r=1 0 0 in each input pin (direct key)
snc88 040 24 - channel midi/speech controller ver: 1. 5 sep 08 , 200 6 3 1 introduction the SNC88040 is a single chip 24 - channel midi compatible wave - 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 synthesis. 2 features ? single power supply 2.4v ? 5.5v ? powerful built - i n 8 - bit controller ? three 8 - bit i/o ports ? 640*8 bits ram ? maximum 64k program rom ? 128k *12 shared rom for program and voice data ? readable rom code data ? 24 - voice polyphony through a high - quality 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 saturation 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
snc88 040 24 - channel midi/speech controller ver: 1. 5 sep 08 , 200 6 4 3 pin assignment symbol i/o function description p00 ~ 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 suppl y 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 high clock crystal out lxin i low clock crystal in lxout o low cloc k 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
snc88 040 24 - channel midi/speech controller ver: 1. 5 sep 08 , 200 6 5 4 block diagram 5 function description 5.1. oscillator cksel (clock select) input pin of the SNC88040 selects between crystal oscillator/ceramic resonator or rc type oscillators as system clock. 1 6 . 3 8 4 m h z x i n c k s e l x o u t r c o s c i l l a t o r c r y s t a l / r e s o n a t o r v d d x i n c k s e l x o u t 2 0 p f 2 0 p f g n d n c n c notice: for rc oscillator, keep xout an d xin as ?no connect?. rom program/speech/melody/instrument waveform 128k ? 12 bits osc address pointers/ stack io2 voice synthesizer alu sram (640 bytes) 10bit d/a x 2 timing generator io1 io 0 music synthesizer sampling rate counter t imer direct drive
snc88 040 24 - channel midi/speech controller ver: 1. 5 sep 08 , 200 6 6 5.2. rom SNC88040 contains a substantial 128k x 12 - bit word internal rom which is shared by program and resource data. program, voice, melodies, data, and instrument waveforms are shared within this same 128k words rom. 5.3. ram SNC88040 c ontains 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 ram 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.
snc88 040 24 - channel midi/speech controller ver: 1. 5 sep 08 , 200 6 7 5.5. ir function when ir is enabled, a 38.5khz square wave is gated with p27. the 38.5k hz 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
snc88 040 24 - channel midi/speech controller ver: 1. 5 sep 08 , 200 6 8 5.7. sampling rate counters each voice channel 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 0.125us. this architecture yields a high - quality music/voice synthesis t hat 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 repeat function. auto repeat functions are normally used to implement s ustain 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 wit h an individual volume setting. 5.10. music synthesizer the SNC88040 has a separate built in hardware music synthesizer for playing midi or melody sequences. compatible with the midi stream format, sequencer note resolution is 480 ticks per quarter - note (tpq n) with tempo range settings from 16 - 400 beats per minute (bpm). music synthesizer tick counter tempo counter midi command interpreter voice synthesizer
snc88 040 24 - channel midi/speech controller ver: 1. 5 sep 08 , 200 6 9 5.11. dac two 10 - bit current type digital - to - analog converters are built - in SNC88040. the relationship between input digital data and output analog current sign al 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 spe aker application
snc88 040 24 - channel midi/speech controller ver: 1. 5 sep 08 , 200 6 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 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 vdd notice: if system clock is rosc, please leave xout and xin as ?no connect?.
snc88 040 24 - channel midi/speech controller ver: 1. 5 sep 08 , 200 6 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 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 vdd vdd notice: if system clock is rosc, please leave xout and xin as ?no connect?.
snc88 040 24 - channel midi/speech controller ver: 1. 5 sep 08 , 200 6 12 ? po wer supply: 4.5v ? system clock: 16.384m crystal ? voice output: da output snc 88040 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
snc88 040 24 - channel midi/speech controller ver: 1. 5 sep 08 , 200 6 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. oscillation freq. f osc - 16.3 84 - mhz v dd =3v ir carrier frequency fir - 38.5 - khz
snc88 040 24 - channel midi/speech controller ver: 1. 5 sep 08 , 200 6 14 disclaimer the information appearing in sonix web pages (?this publication?) is believed to be accurate. however, this publication could conta in 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 implied or by description in this publi cation 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 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 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 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 illustrated 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 discontinue marketing the products lis ted 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 applicatio ns. 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 application.

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