MC68HC05PV8 Datasheet, PDF (44/196 Pages) Freescale Semiconductor, Inc – Techinal Data - rev 1.9

Technical Data
Freescale Semiconductor, Inc.
3.2 CPU Registers
Figure 3-1 shows the five CPU registers. CPU registers are not part of
the memory map.
7
A
0
ACCUMULATOR (A)
7
X
0
INDEX REGISTER (X)
15
65
0000000011
SP
0
STACK POINTER (SP)
15
10
87
0
PCH
PCL
PROGRAM COUNTER (PC)
7
54
0
1 1 1 H I N Z C CONDITION CODE REGISTER (CCR)
HALF-CARRY FLAG
INTERRUPT MASK
NEGATIVE FLAG
ZERO FLAG
CARRY/BORROW FLAG
Figure 3-1 Programming Model
3.2.1 Accumulator
The accumulator is a general-purpose 8-bit register. The CPU uses the
accumulator to hold operands and results of arithmetic and
non-arithmetic operations.
Reset:
Bit 7
6
5
4
3
2
Unaffected by reset
Figure 3-2 Accumulator
1
Bit 0
Technical Data
MC68HC(8)05PV8/A — Rev. 1.9
CPU and Instruction Set
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