Document
S PC81A1 SP
80KB Sound Controller
SEP. 06, 2001 Version 1.3
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SPC81A1
Table of Contents
PAGE
1. GENERAL DESCRIPTION.......................................................................................................................................................................... 3 2. BLOCK DIAGRAM ...................................................................................................................................................................................... 3 3. FEATURES.................................................................................................................................................................................................. 3 4. APPLICATION FIELD ................................................................................................................................................................................. 3 5. SIGNAL DESCRIPTIONS* .......................................................................................................................................................................... 4 6. FUNCTIONAL DESCRIPTIONS.................................................................................................................................................................. 5 6.1. CPU ..................................................................................................................................................................................................... 5 6.2. OSCILLATOR .......................................................................................................................................................................................... 5 6.3. MASK OPTION ....................................................................................................................................................................................... 5 6.4. ROM AREA ........................................................................................................................................................................................... 5 6.5. RAM AREA ............................................................................................................................................................................................ 5 6.6. MULTI-DUTY-CYCLE MODE ..................................................................................................................................................................... 5 6.7. 1/2, 1/3, 1/4 DUTY CYCLE OUTPUTS ...................................................................................................................................................... 5 6.8. MAP OF MEMORY AND I/OS .................................................................................................................................................................... 5 6.9. I/O PORT CONFIGURATIONS* ................................................................................................................................................................. 5 6.10. SERIAL INTERFACE I/O ........................................................................................................................................................................ 6 6.11. SPEECH AND MELODY ......................................................................................................................................................................... 6 6.12. VOLUME CONTROL FUNCTION.............................................................................................................................................................. 6 6.13. POWER SAVINGS MODE ...................................................................................................................................................................... 7 6.14. LOW VOLTAGE RESET ......................................................................................................................................................................... 7 6.15. TIMER/COUNTER ..................................................................