INTRODUCTION

SNC21085 is a one-channel voice synthesizer IC with Push-Pull direct drive circuit. It built in a 4-bit tiny controller with three 4-bit I/O ports. By programming through the tiny controller in SNC21085, user’s varied applications including voice section combination, key trigger arrangement, output control, and other logic functions can be easily implemented.

FEATURES

? Single power supply 2.4V – 5.5V

? System Clock is 2MHz, the instruction cycle is 4us

? 85 seconds voice capacity are provided (@6KHZ sample rate)

? Built in a 4-bit tiny controller

? I/O Port

? Three 4-bit I/O ports P1, P2 and P3 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

? 256K*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

? Push-Pull DAC with 12 bits resolution (Direct Drive)

? Event Mark function supported

? Low-Voltage Detect circuit

? Watch Dog Timer Reset function.