SN69040B

LCD Controller with Voice/Dual Tone Melody

INTRODUCTION

SN69040B is a single chip voice/dual tone melody synthesizer IC with 4*32 LCD

direct drive capability which contains two 4-bit I/O ports, two optional 4-bit output

ports and a tiny controller. By programming through the tiny controller, user’s

applications including LCD display, section combination, trigger modes, output

status, voice/melody playing and other logic functions and then be easily

implemented.

FEATURES

Single power supply 2.4V - 5V

Built in a tiny controller

Two 4-bit I/O ports and two optional 4-bit output ports are provided

Built in 40K*10 ROM

256*4 bits RAM for programming usage are provided

32*4 bits RAM for LCD display usage are provided

Maximum 16k program ROM is provided

Readable ROM code data

Built in direct 4*32 LCD driver

LCD 1/3 bias, 1/4 duty

Built in a high quality speech synthesizer

Adaptive playing speed from 2.5k-40kHz is provided

Built in a dual tone melody generator

Speech/Dual tone melody mixer is provided which SN69040B can play speech

and dual tone melody simultaneously

Fixed current D/A output is provided to drive external connected transistor for

sound output

PWM output is provided to drive external connected piezo buzzer

Ver 1.1

February 15, 2006

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