INTRODUCTION

SNC20AS is a single channel voice synthesizer IC with PWM direct drive circuit. It built-in a 4-bit tiny controller with six I/O pins. By programming through the tiny controller in SNC20AS, 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

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

♦ Built in a 4-bit tiny controller

♦ Where P3.2, P3.3 can direct drive LED (8mA for driving, 16mA for sink)

♦ Six I/O pins are provided (P3.0~P3.3, P2.0, P2.1)

♦ 48*4 bits RAM are provided

♦ 256K*10 ROM size are provided for voice data and program

♦ Maximum 16K program ROM is provided

♦ Readable ROM code data

♦ Built in a high quality speech synthesizer

♦ Adaptive playing speed from 2.5k-20kHz is provided

♦ Built in a PWM Direct Drive circuit and a fixed current D/A output

♦ 8-level volume control for PWM Direct Drive output

♦ System clock: 2MHz

♦ Low Power Detect