SNC26021

One Channel Speech Controller

Ver: 1.7

October 14, 2009

3

1. INTRODUCTION

SNC26021 is a one-channel voice synthesizer IC with PWM direct drive circuit. It built

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

controller in SNC26021, 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

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

Built in a 4-bit tiny controller

I/O Port

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One 4-bit I/O ports P2 is provided.

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The driving/sink current of P2 is up to 8mA/16mA

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The IO pins P2.3 can be modulated with 38.5Khz carry signal to implement IR

function.

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PWM output for IO (P2.0~P2.3)

(64+8)*4 bits RAM are provided.

Maximum 44K program ROM is provided

44K*12 shared ROM for voice data and program

Readable ROM code data

Voice Synthesizer:

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Single channel speech output.

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Support 4-bits SONiX-ASDPCM and 8-bit PCM algorithm

Adaptive playing speed from 2.5k-20kHz is provided

Built in an PWM circuit output, can directly connected to Speaker for sound

output.

System clock: 2MHz

Event Mark function supported

Low Power Detect.

Watch Dog Timer Supported