mc68hc908jb8 Freescale Semiconductor, Inc, mc68hc908jb8 Datasheet - Page 71

• Manufacturer Part Number: mc68hc908jb8
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

6.4 CPU Registers
6.4.1 Accumulator
MC68HC908JB8•MC68HC08JB8•MC68HC08JT8 — Rev. 2.3
Freescale Semiconductor
Figure 6-1
the memory map.
The accumulator is a general-purpose 8-bit register. The CPU uses the
accumulator to hold operands and the results of arithmetic/logic
operations.
Reset:
Read:
Write:
15
15
15
Bit 7
shows the five CPU registers. CPU registers are not part of
Central Processor Unit (CPU)
H
6
Figure 6-2. Accumulator (A)
Figure 6-1. CPU Registers
V 1 1 H I N Z C
7
7
5
X
Unaffected by reset
4
0
0
0
0
0
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
Central Processor Unit (CPU)
2
1
CPU Registers
Technical Data
Bit 0
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