Zilog Z86193 - Manual (Page 206)

Z8
®
CPU
User Manual
UM001604-0108 Instruction Description
199
Load External Data
Syntax
LDE dst, src
Instruction Format
Operation
dst
←
src
This instruction is used to load a byte from external data memory into a Working Register
or vice versa. The address of the external data memory location is specified by a Working
Register Pair. The contents of the source operand are not affected.
Example 1
If Working Register Pair R6 and R7 contain the value
40A2h
and external data memory
location
40A2h
contains the value
22h
, the statement:
LDE R2, @RR6
Op Code: 82 26
loads the value
22h
into Working Register R2. The value of external data memory loca-
tion
40A2h
is unchanged by the load.
Example 2
If Working Register Pair R6 and R7 contain the value
404Ah
and Working Register R2
contains the value
22h
, the statement:
LDE @RR6, R2
Op Code: 92 26
Cycles
OPC
(Hex)
Address Mode
dst src
OPC dst src 12 82 r Irr
OPC src dst 12 92 Irr r
Flag Description
C Unaffected
Z Unaffected
S Unaffected
V Unaffected
D Unaffected
H Unaffected