Document
SNC21200
1-CH H.Q. Speech Controller
===================== CONTENTS =====================
1. 2. 3. 4. 5. INTRODUCTION............................................................................................................3 FEATURES ......................................................................................................................3 PIN ASSIGNMENT.........................................................................................................4 BLOCK DIAGRAM ........................................................................................................4 FUNCTION DESCRIPTIONS .......................................................................................5 5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 5.9 5.10 5.11 5.12 6. 7. 8. OSCILLATOR ...............................................................................................................5 ROM ..........................................................................................................................5 RAM ..........................................................................................................................5 POWER DOWN MODE ..................................................................................................5 SAMPLING RATE COUNTER .........................................................................................5 I/O PORTS ...................................................................................................................6 IR FUNCTION ..............................................................................................................6 PWM IO CONTROL .....................................................................................................6 www.DataSheet4U.com WATCH DOG TIMER ....................................................................................................6 PUSH-PULL & DA OUTPUT ........................................................................................7 MARK REGISTER .........................................................................................................8 LOW VOLTAGE HOLD .................................................................................................8
ABSOLUTE MAXIMUM RATING ..............................................................................9 ELECTRICAL CHARACTERISTICS .........................................................................9 APPLICATION CIRCUIT ...........................................................................................10
Ver: 1.0
1
November 08, 2006
SNC21200
1-CH H.Q. Speech Controller
AMENDENT HISTORY
Version Ver 1.0 Date November 08, 2006 First issue Description
Ver: 1.0
2
November 08, 2006
SNC21200
1-CH H.Q. Speech Controller
1. INTRODUCTION
SNC21200 is a one-channel voice synthesizer IC with Push-Pull direct drive circuit. It built in a 4-bit tiny controller with four 4-bit I/O ports. By programming through the tiny controller in SNC21200, user’s varied applications including voice section combination, key trigger arrangement, output control, and other logic functions can be easily implemented.
2. FEATURES
Single power supply 2.4V – 5.5V System Clock is 2MHz, the instruction cycle is 4us 200 seconds voice capacity are provided (@6KHZ sample rate) Built in a 4-bit tiny controller I/O Port Four 4-bit I/O ports P1, P2, P3 and P6 are provided The driving/sink current of P3.2 & P3.3 is up to 8mA/16mA The IO pins P3.3 or P2.3 can be modulated with 38.5Khz carry signal to implement IR function. PWM output for IO (P3.0~P3.3) 128*4 bits RAM are provided Maximum 16k program ROM is provided 640K*10 shared ROM for voice data and program Readable ROM code data Built-in one channel High Quality speech synthesizer Adaptive playing speed from 2.5k-20kHz is provided Automatic repetition Support 5-bit ADPCM and 10 bit PCM format Built in an 8-level volume control Push-Pull Direct Drive circuit output, can directly connected to Speaker for sound output 12 bit Push-Pull DA output and 12 bit current DAC output Event Mark function supported Low-Voltage Detect circuit Watch Dog Timer Reset function.
Ver: 1.0
3
November 08, 2006
SNC21200
1-CH H.Q. Speech Controller
3. PIN ASSIGNMENT
Symbol P10~P13 P20~P23 P30~P33 P60~P63 RST TEST FUSEPAD OSC RCSEL DAON DAOP DACO VDD GND I/O I/O I/O I/O I/O I I I I I O O O P P Function Description I/O port 1: IO I/O port 2: IO I/O port 3: IO I/O port 6: IO Reset Chip (Active H) Test pin Fuse mode selection pad The test mode clock input pad or OSC Ring OSC R selection Push-Pull output 1 Push-Pull output 2 Current DAC output Positive power supply Negative power supply
4. Block Diagram
ROM
Program/Speech
Address Pointers/ STACK SRAM (128 nibbles)
Timing Generator
OSC
Sampling Rate Counter Voice Synthesizer PWM IO
Watch Dog Timer Push-Pull Circuit
Timer ALU
IO port 1
IO port 2
IO port 3
IO port 6
Ver: 1.0
4
November 08, 2006
SNC21200
1-CH H.Q. Speech Controller
5. FUNCTION DESC.