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M68HC08 数据表(PDF) 69 Page - Freescale Semiconductor, Inc

部件名 M68HC08
功能描述  Microcontrollers
PDF  288 Pages
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制造商  FREESCALE [Freescale Semiconductor, Inc]
网页  http://www.freescale.com
标志 FREESCALE - Freescale Semiconductor, Inc

M68HC08 数据表(HTML) 69 Page - Freescale Semiconductor, Inc

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Central Processor Unit (CPU)
MC68HC908BD48 — Rev. 2.1
Data Sheet
Freescale Semiconductor
Central Processor Unit (CPU)
69
Figure 6-1. CPU Registers
6.4.1 Accumulator
The accumulator is a general-purpose 8-bit register. The CPU uses the
accumulator to hold operands and the results of arithmetic/logic
operations.
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
V1 1 H I N Z C
H
X
0
0
0
0
7
15
15
15
70
Bit 7
654321
Bit 0
Read:
Write:
Reset:
Unaffected by reset
Figure 6-2. Accumulator (A)



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