MC68HC705K1 Datasheet, PDF (32/140 Pages) Freescale Semiconductor, Inc – HCMOS Microcontroller Unit

Freescale Semiconductor, Inc.
Central Processor Unit (CPU)
3.3 CPU Registers
Figure 3-1 shows the five CPU registers. CPU registers and are not part
of the memory map.
76543210
ACCUMULATOR (A)
76543210
INDEX
REGISTER (X)
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
00000000111
STACK
POINTER (SP)
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
000000
PROGRAM
COUNTER (PC)
76543210
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
Technical Data
Central Processor Unit (CPU)
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MC68HC705K1 — Rev. 2.0