SN65020

One Channel Direct Drive Speech Controller

December 20, 2000

1

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

PIN ASSIGNMENT

Symbol

I/O

Function Description

P20

I/O Bit0 of I/O port 2

P21

I/O Bit1 of I/O port 2

P22

I/O Bit2 of I/O port 2

P23

I/O Bit3 of I/O port 2

I

Positive power supply

OSC

I

Oscillation component connection pin

TEST

I

For testing only

GND

I

Negative power supply

BUO1

O

PWM output 1

BUO2

O

PWM output 2