Z8018x Family
MPU User Manual
181
8-bit Register
g or g field '
ww field
0 0
0 1
1 0
1 1
Register
B C
D E
H L
S P
Register
B
C
D
E
H
L
0
0 0 1
0 1 0
0 1 1
1 0 0
1 0 1
1 1 0
1 1 1
xx field
0 0
0 1
Register
B C
D E
—
A
I
X
1 0
S P
1 1
16-bit Register
yy field
0 0
Register
B C
zz field
0 0
Register
B C
0 1
D E
0 1
D E
1 0
1 0
I Y
H L
1 1
1 1
S P
A F
Suffixed H and L ww,xx,yy,zz (ex. wwH,IXL) indicate upper and
lower 8-bit of the 16-bit register respectively.
Figure 75. Register Direct — Bit Field Definitions
Register Indirect (REG)
The memory operand address is contained in one of the 16-bit General
Purpose Registers (BC, DE, and HL) as illustrated in Figure 76.
B C
D E
Operand
Memory
H L
Figure 76. Register Indirect Addressing
UM005001-ZMP0400
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