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6.4.1 Accumulator (A)
MC68HC(7)08KH12
Rev. 1.1
—
Freescale Semiconductor
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:
7
0
0
X
0
0
7
0
V 1 1 H I N Z C
Figure 6-1. CPU Registers
5
4
Unaffected by reset
Figure 6-2. Accumulator (A)
ACCUMULATOR (A)
INDEX REGISTER (H:X)
STACK POINTER (SP)
PROGRAM COUNTER (PC)
CONDITION CODE REGISTER (CCR)
CARRY/BORROW FLAG
ZERO FLAG
NEGATIVE FLAG
INTERRUPT MASK
HALF-CARRY FLAG
TWO'S COMPLEMENT OVERFLOW FLAG
3
2
1
Advance Information
Bit 0
53
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