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User’s Manual
µPD789026 Subseries
8-Bit Single-Chip Microcontrollers
µPD789022
µPD789024
µPD789025
µPD789026www.DataSheet4U.com
µPD78F9026A
Document No. U11919EJ3V0UMJ1 (3rd edition)
Date Published October 2000 N CP(K)
© 19986, 1999
Printed in Japan

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2 User's Manual U11919EJ3V0UM00

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SUMMARY OF CONTENTS
CHAPTER 1 GENERAL ....................................................................................................................................23
CHAPTER 2 PIN FUNCTIONS..........................................................................................................................33
CHAPTER 3 CPU ARCHITECTURE.................................................................................................................41
CHAPTER 4 PORT FUNCTIONS......................................................................................................................69
CHAPTER 5 CLOCK GENERATION CIRCUIT ................................................................................................85
CHAPTER 6 16-BIT TIMER ..............................................................................................................................93
CHAPTER 7 8-BIT TIMER/EVENT COUNTER..............................................................................................105
CHAPTER 8 WATCHDOG TIMER ..................................................................................................................115
CHAPTER 9 SERIAL INTERFACE 00............................................................................................................121
CHAPTER 10 INTERRUPT FUNCTIONS .........................................................................................................149
CHAPTER 11 STANDBY FUNCTION..............................................................................................................167
CHAPTER 12 RESET FUNCTION ....................................................................................................................175
CHAPTER 13 µPD78F9026A............................................................................................................................179
CHAPTER 14 INSTRUCTION SET ...................................................................................................................185
APPENDIX A DEVELOPMENT TOOLS ...........................................................................................................195
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APPENDIX B EMBEDDED SOFTWARE..........................................................................................................205
APPENDIX C REGISTER INDEX .....................................................................................................................207
APPENDIX D REVISION HISTORY .................................................................................................................211
User's Manual U11919EJ3V0UM00
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