SNC678
4-Channel Speech Controller
======== CONTENTS ========
1.
2.
3.
4.
5.
INTRODUCTION...............................................................................................................3
FEATURES .......................................................................................................................3
BLOCK DIAGRAM ...........................................................................................................4
PIN ASSIGNMENT ...........................................................................................................4
FUNCTION DESCRIPTIONS............................................................................................5
5.1
5.2
5.3
5.4
5.5
5.6
5.7
5.8
5.9
5.10
OSCILLATOR ...................................................................................................................5
ROM..............................................................................................................................5
RAM ..............................................................................................................................5
POWER DOWN MODE ......................................................................................................5
SAMPLING RATE COUNTERS ............................................................................................5
AUTO REPETITION ...........................................................................................................6
I/O PORTS ......................................................................................................................6
IR FUNCTION ..................................................................................................................7
8-BIT DAC ......................................................................................................................7
8-BIT PWM.....................................................................................................................8
6.
ABSOLUTE MAXIMUM RATING.....................................................................................9
ELECTRICAL CHARACTERISTICS................................................................................9
ROSC PERFORMANCE.................................................................................................10
APPLICATION CIRCUIT ................................................................................................11
BONDING PAD...........................................................................................................13
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Ver: 1.3
June 8, 2005