SNC678

4-Channel Speech Controller

1. INTRODUCTION

SNC678 is a 42 seconds single chip 4-channel voice synthesizer IC which contains 24

I/O pins and a tiny controller. By programming through the tiny controller, users’

applications including section combination, trigger modes, output status, high

performance melody, multiple voices, and other logic functions can be implemented.

2. FEATURES

Single power supply 2.4V – 5.5V

Built in a tiny controller

42 seconds voice capacity are provided

Six 4-bit I/O ports are provided

256*4 bits RAM are provided

Maximum 64k program ROM is provided

132K *12 ROM size is provided for voice data and program

Readable ROM code data

Built in a high quality speech synthesizer

Four independent voice channels

Adaptive playing speed from 4k-40kHz is provided for all 4 channels individually

Automatic repetition for every channel

A 6-bit*8-bit Multiplier is embed to modulate the volume of synthesized voices

Two digital mixers (with saturation control) are provided

Built in a PWM Direct Drive circuit and a current output DA converters.

Built in 15 levels PWM output volume control.

System clock: 8M Hz ( RC-type or Crystal Option)

Low Voltage Reset

Ver: 1.2

August 26, 2003

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