INTRODUCTION
SN65020 is a 20 seconds one-channel single chip voice synthesizer IC which contains a PWM Direct Drive Circuit. There is one 4-bit I/O port 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
  20 seconds voice capacity is provided
  Built in a tiny controller
  One 4-bit I/O port is provided
  64*4 bit 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
  Built in a PWM Direct Drive circuit output BUO1 and BUO2 directly connected to Speaker for sound output
  System clock :1MHZ