Z80180 Datasheet, PDF (196/326 Pages) Zilog, Inc. – Z8018x Family MPU

Z 8018x Fam ily
M PU Us e r M anual
181
8-bit Register
g or g field '
0
0 01
0 10
0 11
1 00
1 01
1 10
1 11
Register
B
C
D
E
H
L
—
A
16-bit Register
zz field
00
01
10
11
Register
BC
DE
HL
AF
ww field
00
01
10
11
xx field
00
01
10
11
yy field
00
01
10
11
Register
BC
DE
HL
SP
Register
BC
DE
IX
SP
Register
BC
DE
IY
SP
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.
BC
DE
HL
Operand
Memory
Figure 76. Register Indirect Addressing
UM005001-ZMP0400