
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