SNC12020

One Channel Speech Controller

===================== CONTENTS =====================

1.

INTRODUCTION............................................................................................................3

2.

FEATURES ......................................................................................................................3

3.

PIN ASSIGNMENT.........................................................................................................3

4.

BLOCK DIAGRAM ........................................................................................................4

5.

FUNCTION DESCRIPTIONS .......................................................................................4

5.1

OSCILLATOR ...............................................................................................................4

5.2

ROM ..........................................................................................................................4

5.3

RAM ..........................................................................................................................5

5.4

POWER DOWN MODE..................................................................................................5

5.5

SAMPLING RATE COUNTER .........................................................................................5

5.6

I/O PORTS...................................................................................................................5

5.7

PUSH-PULL OUTPUT ...................................................................................................6

5.8

WATCH DOG TIMER....................................................................................................6

5.9

IR FUNCTION ..............................................................................................................6

6.

ABSOLUTE MAXIMUM RATING ..............................................................................6

7.

ELECTRICAL CHARACTERISTICS .........................................................................7

8.

APPLICATION CIRCUIT .............................................................................................8

Ver: 1.4

March 17, 2005

1