SNC12040

One Channel Speech Controller

1. INTRODUCTION

SNC12040 is a one-channel voice synthesizer IC with Push-Pull direct drive circuit. It

built-in a 4-bit tiny controller with three 4-bit I/O ports. By programming through the tiny

controller in SNC12040, user’s varied applications including voice section combination,

key trigger arrangement, output control, and other logic functions can be easily

implemented.

2. FEATURES

Single power supply 2.4V – 5.5V

40 seconds voice capacity are provided (@6KHZ sample rate)

Built in a 4-bit tiny controller

I/O Port

Three 4-bit I/O ports P1, P2 and P3 are provided.

−

−

−

The driving/sink current of P3.2 & P3.3 is up to 8mA/16mA

The IO pins P3.3 can be modulated with 38.5Khz carry signal to implement IR

function.

64*4 bits RAM are provided

Maximum 16k program ROM is provided

128K*10 shared ROM for voice data and program

Readable ROM code data

Built in one channel speech synthesizer

Adaptive playing speed from 2.5k-20kHz is provided

Built in an 8-level volume control Push-Pull Direct Drive circuit output, can directly

connected to Speaker for sound output.

System clock: 2MHz

Event Mark function supported

Low Power Reset

Watch Dog Timer Supported

3. PIN ASSIGNMENT

Symbol

I/O

Function Description

P10~P13

I/O

I/O port 1: IO

P20~P23

I/O

I/O port 2: IO

P30~P33

I/O

I/O port 3: IO

Rosc

I

Oscillation component connection pin

BUO1

O

Push-Pull output 1

BUO2

O

Push-Pull output 2

RST

I

RST=1

Reset Chip (Active H)

VDD

I

Positive power supply

GND

I

Negative power supply

Test

I

Test pin

Ver: 1.4

March 17, 2005

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