View SNC82268_4647710.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

SNC82268 12 - 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 scillator ................................ ................................ ................................ ................................ 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 ................................ ................................ ................................ ........ 7 5.8. a uto r epetition ................................ ................................ ................................ ....................... 8 5.9. v oice s ynthesizer ................................ ................................ ................................ ................... 8 5.10. dac ................................ ................................ ................................ ................................ ........... 8 6 application circuit ................................ ................................ ................................ ........... 9 7 absolute maximum rat ing ................................ ................................ .......................... 12 8 electrical characteristics ................................ ................................ ..................... 12
SNC82268 12 - 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. mo dify 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 ram block in page6 2. modify rom 768k - >810k 3. modify applica tion circuit in low clk (rc mode) r=91k, c=200pf. 4. in application circuit add r=100 (direct key) in page9 5. 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 hi gh clock rc mode. 2. remove chapter 6 application circuit rc mode. ver1.5 november 18,2005 1. modify application circuit add r=100 in each input pin (direct key) 2. modify application circuit add a diode between ?vdd? and ?vddvr? @4.5v ver1.6 september,8,2006 1. add high clock rc mode in oscillator functional description (ch ap. 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)
SNC82268 12 - channel midi/speech controller ver: 1. 6 sep. 8 , 2006 3 1 introduction the SNC82268 is a single chip 12 - channel midi compatible wave - table/voice synthesizer. equipped with a powerful 8 - bit controller and 12 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 ? 5.5 v ? powerful built - in 8 - bit controller ? three 8 - bit i/o ports ? 384*8 bits ram ? maximum 64k program rom ? 810k *12 shared rom for program and voice data ? readable rom code data ? 12 - 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 12 channels ? automatic repetition for each channel ? volume modulation controlled by embedded multiplier ? one digital mixers with s aturation control ? one built - in 10 - bit current mode da converters ? analog direct drive speaker circuit. ? system clock: 16.384m hz ( rc - type or crystal option) ? 2 mips cpu power free to user ? low voltage reset
SNC82268 12 - channel midi/speech controller ver: 1. 6 sep. 8 , 2006 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 gnd pp 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 high 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 vo o da output bn0 o direct drive negative output bp0 o direct drive positive output
SNC82268 12 - 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 SNC82268 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 810k ? 12 bits osc address pointers/ stack io2 voice synthesizer alu sram (384 bytes) 10bit d/a timing generator io1 io 0 samp ling rate counter timer direct drive
SNC82268 12 - channel midi/speech controller ver: 1. 6 sep. 8 , 2006 6 5.2. rom SNC82268 contains a substantial 810k x 12 - bit word internal rom which is shared by program and resource data. program, voice, melodies, data, and instrument waveforms are share d within this same 810k words rom. 5.3. ram SNC82268 contains 384 bytes ram (384 x 8 - bits). the 384 byte ram is divided into five pages (page0, 1and 4, 128 bytes ram for each page). the rambk register is used to switch to a specific ram page. for example, d eclaring org 0x 250 usemem ds 1 would locate one byte memory for ? usemem ? at bank 4. setting ?rambk = 4?in a program would switch to bank 4 of ram. 0x027f 0x0000 0x0100 0x00ff : : 0x007f 0x0080 : : : 0x017f 0x0180 no used 0x01ff : : 0x0200 : : free for user no used reserved for system 0x00c0 free for user notice: (c0~ffh) and (200~27fh) bank4 is free for user. 5.4. po wer 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 ope rating mode.
SNC82268 12 - 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 prog rammed 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. 5.7. samp ling rate counters each voice channel of 12 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 i s updated on a period of 0.125us. 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. 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
SNC82268 12 - channel midi/speech controller ver: 1. 6 sep. 8 , 2006 8 5.8. auto repetition each voice channel of 12 is equi pped with a hardware auto repeat 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 12 is equipped with an individual volume setting. 5.10. dac one 10 - bit current type digital - to - analog converters are built - in SNC82268. the relationship between input digital data a nd 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. v o v c c 1 k single speaker application
SNC82268 12 - channel midi/speech controller ver: 1. 6 sep. 8 , 2006 9 6 application circuit ? power supply: 3.0v ? system clock: rosc with calibration or rtc function ? low clock: 32768 ? voice output: direct drive output SNC82268 vddvr vdd vddpp regout cvdd xin rst vdd xout cksel testm p00 p01 p02 p03 p04 p05 p06 p07 p10 p11 p12 p13 vo bn0 bp0 gnd gndpp vdd 0.1uf vdd 51k p14 p15 p16 p17 gndvr 0.1uf vdd 10uf 10 10 p20 p21 p22 p23 p25 p26 p27 p24 vdd 3 2 7 6 8 20pf 20pf lxin lxout vdd notice: if system clock is rosc, please leave xout and xin as ?no connect?.
SNC82268 12 - channel midi/speech controller ver: 1. 6 sep. 8 , 2006 10 ? power supply: 4.5 v ? system clock: rosc with calibration or rtc function ? low clock: r - type ? voice output: da output SNC82268 vddvr vdd vddpp regout cvdd rst vdd cksel testm p00 p01 p02 p03 p04 p05 p06 p07 p10 p11 p12 p13 vo bn0 bp0 gnd gndpp vdd 0.1uf 51k p14 p15 p16 p17 gndvr 0.1uf vdd 10uf 10 10 p20 p21 p22 p23 p25 p26 p27 p24 lxin lxout xin xout vdd vdd 1k 91k 200pf vdd vdd 4.7uf notice: if system clock is rosc, please leave xout and xin as ?no connect?.
SNC82268 12 - channel midi/speech controller ver: 1. 6 sep. 8 , 2006 11 ? power su pply: 4.5v ? system clock: 16.384m crystal ? voice output: da output vdd 1k vddvr vdd vddpp regout cvdd rst vdd cksel testm p00 p01 p02 p03 p04 p05 p06 p07 p10 p11 p12 p13 vo bn0 bp0 gnd gndpp 0.1uf 4.7uf 51k p14 p15 p16 p17 gndvr 0.1uf vdd 10uf 10 10 p20 p21 p22 p23 p25 p26 p27 p24 lxin lxout 1 6 . 3 8 4 m h z 2 0 p f 2 0 p f xin xout SNC82268 vdd vdd
SNC82268 12 - channel midi/speech controller ver: 1. 6 sep. 8 , 2006 12 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 d d =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
SNC82268 12 - channel midi/speech controller ver: 1. 6 sep. 8 , 2006 13 disclaimer the information appearing in sonix web pages (?this publication?) is believed to be accurate. however, this publication could contain technical inaccuracies or typographical errors. th e 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 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, 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 deve loped 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 availabl e. 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 warran ties, 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 listed at any time without notice. accordingly, the rea der 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 r eliability requirements, e.g. military equipment or medical life support equipment, are specifically not recommended without additional processing by sonix for such application.

▲Up To Search▲

Price & Availability of SNC82268

	To Download SNC82268 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .