
4502 Group User’s Manual
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Table of contents
DESCRIPTION ................................................................................................................................ 1-2
 FEATURES ...................................................................................................................................... 1-2
 APPLICATION ................................................................................................................................ 1-2
 PIN CONFIGURATION .................................................................................................................. 1-2
 BLOCK DIAGRAM ......................................................................................................................... 1-3
 PIN DESCRIPTION ........................................................................................................................ 1-5
 MULTIFUNCTION ..................................................................................................................... 1-5
 PORT FUNCTION .................................................................................................................... 1-6
 PORT BLOCK DIAGRAMS ..................................................................................................... 1-8
 PROGRAM MEMOY (ROM) .................................................................................................. 1-16
 DATA MEMORY (RAM) ......................................................................................................... 1-17
 INTERRUPT FUNCTION ....................................................................................................... 1-18
 EXTERNAL INTERRUPTS .................................................................................................... 1-22
 TIMERS ................................................................................................................................... 1-25
 WATCHDOG TIMER .............................................................................................................. 1-30
 A-D CONVERTER .................................................................................................................. 1-32
 RESET FUNCTION ................................................................................................................ 1-37
 RAM BACK-UP MODE .......................................................................................................... 1-41
 ROM ORDERING METHOD ....................................................................................................... 1-48
 LIST OF PRECAUTIONS ............................................................................................................ 1-49
 CONTROL REGISTERS .............................................................................................................. 1-52
 INSTRUCTIONS ............................................................................................................................ 1-56
 INSTRUCTION CODE TABLE ............................................................................................ 1-102
 BUILT-IN PROM VERSION ...................................................................................................... 1-104
 Table of contents