SONIX SN6A297 Datasheet

SN6A297

LCD Controller with Voice/Dual Tone Melody

 INTRODUCTION

SN6A297 is a single chip voice/dual tone melody synthesizer IC with 8*40 direct
drive capability which contains two 4-bit I/O ports, one 4-bit output port and a
tiny controller. By programming through the tiny controller, user’s application
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 – 5.1V



Built in a tiny controller



Two 4-bit I/O ports are provided, one 4-bit output ports are provided



272*4 bits RAM for programming usage are provided (page0~15, m8~m15



of page18 and page21)

80*4 bits RAM for LCD display usage are provided



Maximum 108k*10 program ROM is provided



Readable ROM code data



Built in direct 8*40 LCD driver



LCD 1/4 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 SN6A297 can play



speech and dual tone melody simultaneously

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



for sound output

1

May 24, 2001

 PIN ASSIGNMENT

SN6A297

LCD Controller with Voice/Dual Tone Melody

Symbol

SEG1-SEG40

COM8-COM1

GND

P23-P20

P33-P30

P43-P40

VO

RESET

OSC

TEST

XIN,XOUT

V

DD

VLCDR

I/O Function Description

O Segment 1~40 for LCD driver.

O

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

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

O

O

Com8-Com1 for 8*40 LCD driver.

I

Negative power supply.

Bit 3 to bit 0 of IO port 4.

D/A current output.

I

Reset pin with internal pull low.

I

Oscillation component connection pin.

I

For testing only.

32768 Hz Crystal connection pins.

I

Positive power supply.

LCD voltage adjusting pin.

VLC1, VLC2,

VLC3, VLC4

LCD voltage bias connection pins.

2

May 24, 2001