SNC88268 반도체 회로 부품 판매점
24-Channel MIDI/Speech Controller
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 SONiX |
SNC88268
24-Channel MIDI/Speech Controller
================== CONTENTS =================
1 INTRODUCTION......................................................................................................................... 3
2 FEATURES ...................................................................................................................................3
3 PIN ASSIGNMENT ...................................................................................................................... 4
4 BLOCK DIAGRAM ..................................................................................................................... 5
5 FUNCTION DESCRIPTION....................................................................................................... 5
5.1.
5.2.
5.3.
5.4.
5.5.
5.6.
5.7.
5.8.
5.9.
5.10.
5.11.
OSCILLATOR................................................................................................................................ 5
ROM........................................................................................................................................... 5
RAM........................................................................................................................................... 6
POWER DOWN MODE .................................................................................................................. 6
IR FUNCTION............................................................................................................................... 7
I/O PORTS ................................................................................................................................... 7
SAMPLING RATE COUNTERS........................................................................................................ 8
AUTO REPETITION ....................................................................................................................... 8
VOICE SYNTHESIZER ................................................................................................................... 8
www.DataSheet4U.com
MUSIC SYNTHESIZER................................................................................................................... 8
DAC ........................................................................................................................................... 9
6 APPLICATION CIRCUIT......................................................................................................... 10
7 ABSOLUTE MAXIMUM RATING.......................................................................................... 13
8 ELECTRICAL CHARACTERISTICS ..................................................................................... 13
Ver: 1.6
1 Sep. 8, 2006
SNC88268
24-Channel MIDI/Speech Controller
AMENDENT HISTORY
Version
Date
Description
Ver 1.0 October 07, 2004 First issue
Ver 1.1 November 12, 2004 Modify Application Circuit.
1. Oscillator R-Type is “no connect”. Page5
2. Modify Application Circuit.(Low CLK Mode, 32768,
Ver 1.2 March 21, 2005
R-Type, Xin and Xout no connect) Page10
3. Modify Electric Characteristic (Max->Typical) Page12
4. Modify I/O Circuit in Page7
1. Modify Application circuit in Low CLK(RC mode)
R=91K, C=200pF
Ver1.3
June 30,2005
2. Modify ROM 768K->810K
3. In Application Circuit add R=100 (direct key) in Page10
4. Modify Chapter 5.1 oscillator about Rosc mode has to let
Xin connect R=51k and C=200pF to GND.
Ver1.4
1. Remove Chapter 5.1 High Clock RC Mode.
September 5,2005
2. Remove Chapter 6 application circuit RC Mode.
1. Modify Application Circuit add a diode between
“VDD“ and “VDDVR” @4.5V.
Ver1.5 November 18,2005
2. Modify Application Circuit add R=100 in each input pin
(direct key).
1. Add High Clock RC Mode in Oscillator functional
description (Chap 5.1)
Ver1.6 September,8,2006 2. Add High Clock RC Mode in Application Circuit
3. Removed Application circuit R=100 in each input pin
(direct key)
Ver: 1.6
2 Sep. 8, 2006
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SNC88268 controller
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