Accumulator - Motorola MC68HC908GP32 Technical Data Manual

10.4.1 Accumulator

MC68HC908GP32 MC68HC08GP32
•
MOTOROLA
Freescale Semiconductor, Inc.
15
H
15
15
The accumulator is a general-purpose 8-bit register. The CPU uses the
accumulator to hold operands and the results of arithmetic/logic
operations.
Bit 7 6
Read:
Write:
Reset:
Figure 10-2. Accumulator (A)
Rev. 6
—
Central Processor Unit (CPU)
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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 10-1. CPU Registers
5 4
Unaffected by reset
Central Processor Unit (CPU)
CPU Registers
3 2 1
Technical Data
Bit 0
149