INTRODUCTION
SN65031 is a 31 seconds two-channel single chip voice synthesizer IC which contains a PWM Direct Drive Circuit and fixed current D/A output. There are two 4-bit I/O ports and built in a tiny controller. By programming through the tiny controller, user’s applications including section combination, trigger modes, output status, and other logic functions can be easily implemented.

FEATURES
♦ Single power supply 2.4V – 5.1V
♦ 31 seconds voice capacity is provided
♦ Built in a tiny controller
♦ Two 4-bit I/O ports are provided
♦ 64*4 bits RAM are provided
♦ 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
♦ Two independent voice channels (Channel 1 + Channel 2→Buo1,Buo2)
♦ Built in a PWM Direct Drive circuit and a fixed current D/A output
♦ Low Voltage Reset
♦ System clock : 2MHZ