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