Z8S180 Zilog., Z8S180 Datasheet - Page 199

• Manufacturer Part Number: Z8S180
• Description: ENHANCED Z180 MICROPROCESSOR
• Manufacturer: Zilog.

184
UM005001-ZMP0400
Z 8018x Fam il y
M PU Us e r M anual
IO (I/O)
IO addressing mode is used only by I/O instructions. This mode specifies
I/O address (IORQ is
1. An operand is output to A0–A7. The contents of accumulator is
2. The contents of Register B is output to A0 –A7. The contents of
3. An operand is output to A0–A7.
4. The contents of Register C is output to A0 –A7.
output to A8–A15.
Register C is output to A8–A15.
internal I/O register access)
A15 (useful for internal I/O register access).
0
) and outputs them as follows.
00H
is output to A8–A15 (useful for
00H
is output to A8–