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