6

µPD780921, 780922, 780923, 780924

CONTENTS

1.

PIN CONFIGURATION (TOP VIEW) .......................................................................................................

7

2.

BLOCK DIAGRAM ................................................................................................................................. 10

3.

PIN FUNCTION LIST .............................................................................................................................. 11

3.1 PORT PINS ..................................................................................................................................... 11

3.2 NON PORT PINS ............................................................................................................................ 12

3.3 RECOMMENDED CONNECTION OF UNUSED PINS ................................................................. 13

4.

MEMORY SPACE ................................................................................................................................... 14

5.

PERIPHERAL HARDWARE FUNCTION FEATURES ......................................................................... 15

5.1 PORTS ............................................................................................................................................. 15

5.2 CLOCK GENERATOR .................................................................................................................... 16

5.3 TIMER/EVENT COUNTERS ........................................................................................................... 17

5.4 REAL-TIME OUTPUT PORT .......................................................................................................... 19

5.5 A/D CONVERTER ........................................................................................................................... 20

5.6 SERIAL INTERFACE ...................................................................................................................... 21

6. INTERRUPT FUNCTIONS ........................................................................................................................ 22

7. EXTERNAL DEVICE EXPANSION FUNCTION ...................................................................................... 25

8. STANDBY FUNCTIONS ........................................................................................................................... 25

9. RESET FUNCTIONS ................................................................................................................................. 25

10. INSTRUCTION SET ................................................................................................................................ 26

11. PACKAGE DRAWINGS .......................................................................................................................... 29

APPENDIX A. DEVELOPMENT TOOLS ...................................................................................................... 31

APPENDIX B. RELATED DOCUMENTS ..................................................................................................... 33