ZiLOG eZ80 User Manual

eZ80
®
CPU
User Manual
UM007714-0908 CPU Instruction Set
150
IN A, (n)
Input from I/O
Operation
A ← ({UU, A, n})
Description
The n operand is placed on the lower byte of the address bus, ADDR[7:0]; the contents of
the accumulator, A, are placed on the middle byte of the address bus, ADDR[15:8]. The
upper byte of the address bus, ADDR[23:16] is undefined for I/O addresses. The byte at I/
O address {UU, A,
n } is written to the accumulator.
Condition Bits Affected
None.
Attributes
Mnemonic Operand ADL Mode Cycle Opcode (hex)
IN (n)X 3DB, nn

ZiLOG eZ80 Specifications

General

Brand	ZiLOG
Model	eZ80
Category	Computer Hardware
Language	English