4551 Group User’s Manual
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Table of contents
DESCRIPTION ................................................................................................................................ 1-3
FEATURES ...................................................................................................................................... 1-3
APPLICATION ................................................................................................................................ 1-3
PORT FUNCTION .................................................................................................................. 1-7
PORT BLOCK DIAGRAMS .................................................................................................. 1-8
PROGRAM MEMORY (ROM) ............................................................................................. 1-13
DATA MEMORY (RAM) ...................................................................................................... 1-14
INTERRUPT FUNCTION ..................................................................................................... 1-15
EXTERNAL INTERRUPTS .................................................................................................. 1-18
TIMERS ................................................................................................................................. 1-20
WATCHDOG TIMER ............................................................................................................ 1-24
RESET FUNCTION .............................................................................................................. 1-32
POWER DOWN FUNCTION ............................................................................................... 1-35
CLOCK CONTROL .............................................................................................................. 1-38
ROM ORDERING METHOD ....................................................................................................... 1-39
LIST OF PRECAUTIONS ............................................................................................................ 1-40
SYMBOL ........................................................................................................................................ 1-41
MACHINE INSTRUCTIONS ........................................................................................................ 1-46
BUILT-IN PROM VERSION ........................................................................................................ 1-64
Table of contents