SONIX SN69040 Datasheet

SN69040

LCD Controller with Voice/Dual Tone Melody

 INTRODUCTION

SN69040 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 SN69040 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

Version.1.01 September 26, 2002

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 PIN ASSIGNMENT

Symbol I/O Function Description

SEG1-SEG24 O segment 1~24 for LCD driver

SN69040

LCD Controller with Voice/Dual Tone Melody

SEG25/P53-SE

G28/P50

SEG29/P43-SE

G32/P40

COM1-COM4 O Com1-Com4 for LCD driver.

GND I Negative power supply.

P33-P30 I/O Bit 3 to bit 0 of IO port 3.

P23-P20 I/O Bit 3 to bit 0 of IO port 2.

BU1,BU2 O Buzzer driver outputs.

VO O D/A current output.

RST I Reset pin with internal pull low.

OSC I Oscillation component connection pin.

O Optional to be SEG25-SEG28 or P53-P50

SEG25-28: segment25~28 for LCD driver.

P53-P50: Bit3-bit0 for output port 5.

O Optional to be SEG29~SEG32 or P43-P40

SEG29~32: segment29~32 for LCD driver.

P43~P40: Bit3-bit0 for output port 4.

TEST I For testing only.

XIN,XOUT 32768 Hz Crystal connection pins.

VDD I Positive power supply.

Version.1.01 September 26, 2002

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