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7531 Group User’s Manual
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Table of contents
DESCRIPTION ................................................................................................................................ 1-2
FEATURES ...................................................................................................................................... 1-2
APPLICATION ................................................................................................................................ 1-2
PIN CONFIGURATION .................................................................................................................. 1-2
FUNCTIONAL BLOCK .................................................................................................................. 1-5
PIN DESCRIPTION ........................................................................................................................ 1-8
GROUP EXPANSION .................................................................................................................... 1-9
Memory type ............................................................................................................................. 1-9
Package ..................................................................................................................................... 1-9
I/O Ports .................................................................................................................................. 1-16
Interrupts ................................................................................................................................. 1-20
Timers ...................................................................................................................................... 1-23
Serial I/O ................................................................................................................................. 1-25
Reset Circuit ........................................................................................................................... 1-32
Clock Generating Circuit ....................................................................................................... 1-34
Processor Status Register .................................................................................................... 1-37
Interrupts ................................................................................................................................. 1-37
Timers ...................................................................................................................................... 1-37
A-D Converter ......................................................................................................................... 1-37
CPU Mode Register ............................................................................................................... 1-37
NOTES ON USE .......................................................................................................................... 1-37
One Time PROM Version ..................................................................................................... 1-37
ROM PROGRAMMING METHOD .............................................................................................. 1-38
Interrupt ................................................................................................................................... 1-39
A-D Converter ......................................................................................................................... 1-41