MC68HC08AZ32A Datasheet, PDF (78/456 Pages) Motorola, Inc – HCMOS Microcontroller Unit

Freescale Semiconductor, Inc.
Central Processor Unit (CPU)
6.3 Features
Features of the CPU include the following:
• Full upward, object-code compatibility with M68HC05 family
• 16-bit stack pointer with stack manipulation instructions
• 16-bit index register with X-register manipulation instructions
• 8.4MHz CPU internal bus frequency
• 64K byte program/data memory space
• 16 addressing modes
• Memory-to-memory data moves without using accumulator
• Fast 8-bit by 8-bit multiply and 16-bit by 8-bit divide instructions
• Enhanced binary-coded decimal (BCD) data handling
• Low-power STOP and WAIT Modes
6.4 CPU registers
Figure 6-1 shows the five CPU registers. CPU registers are not part of
the memory map.
Technical Data
78
15
H
15
15
7
0
ACCUMULATOR (A)
0
X
INDEX REGISTER (H:X)
0
STACK POINTER (SP)
0
PROGRAM COUNTER (PC)
7
0
V 1 1 H I N Z C CONDITION CODE REGISTER (CCR)
CARRY/BORROW FLAG
ZERO FLAG
NEGATIVE FLAG
INTERRUPT MASK
HALF-CARRY FLAG
TWO’S COMPLEMENT OVERFLOW FLAG
Figure 6-1. CPU Registers
MC68HC08AZ32A — Rev 1.0
Central Processor Unit (CPU)
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