SNC658

4-Channel Speech Controller

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

1.

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

2.

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

3.

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

4.

PIN ASSIGNMENT ........................................................................................................... 4

5.

FUNCTION DESCRIPTIONS............................................................................................ 5

5.1

OSCILLATOR ................................................................................................................... 5

5.2

ROM.............................................................................................................................. 5

5.3

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

5.4

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

5.5

SAMPLING RATE COUNTERS ............................................................................................ 5

5.6

AUTO REPETITION ........................................................................................................... 6

5.7

I/O PORTS ...................................................................................................................... 6

5.8

IR FUNCTION .................................................................................................................. 7

5.9

8-BIT DAC ...................................................................................................................... 7

5.10

8-BIT PWM ..................................................................................................................... 8

6.

ABSOLUTE MAXIMUM RATING ..................................................................................... 9

7.

ELECTRICAL CHARACTERISTICS ................................................................................ 9

8.

ROSC PERFORMANCE................................................................................................. 10

9.

APPLICATION CIRCUIT ................................................................................................ 11

10.

BONDING PAD........................................................................................................... 13

Ver: 1.2

September 25, 2003

1