
UM008007-0715 Z80 Instruction Description
Z80 CPU
User Manual
97
LD dd, nn
Operation
dd ← nn
Op Code
LD
Operands
dd, nn
Description
The 2-byte integer nn is loaded to the dd register pair, in which dd defines the BC, DE,
HL, or SP register pairs, assembled as follows in the object code:
The first n operand after the op code is the low-order byte.
Condition Bits Affected
None.
Example
Upon the execution of an LD HL, 5000h instruction, the HL register pair contains 5000h.
Pair dd
BC 00
DE 01
HL 10
SP 11
M Cycles T States 4 MHz E.T.
2 10 (4, 3, 3) 2.50
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