CENTRAL PROCESSOR UNIT
M68HC16 Z SERIES
4-2
USER’S MANUAL
Figure 4-1 CPU16 Register Model
16
20
15
0
8 7
BIT POSITION
ACCUMULATORS A AND B
CPU16 REGISTER MODEL
ACCUMULATOR D (A:B)
ACCUMULATOR E
A
B
D
E
XK
IX
INDEX REGISTER X
YK
IY
INDEX REGISTER Y
ZK
IZ
INDEX REGISTER Z
SK
SP
STACK POINTER SP
PK
PC
PROGRAM COUNTER PC
CCR
PK
CONDITION CODE REGISTER CCR
PC EXTENSION FIELD PK
EK
XK
YK
ZK
ADDRESS EXTENSION REGISTER K
SK
STACK EXTENSION FIELD SK
MAC MULTIPLIER REGISTER HR
HR
MAC MULTIPLICAND REGISTER IR
IR
AM
AM
MAC ACCUMULATOR MSB[35:16] AM
MAC ACCUMULATOR LSB[15:0] AM
XMSK
YMSK
MAC XY MASK REGISTER
K
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