INSTRUCTION DESCRIPTIONS
MOTOROLA INSTRUCTION SET DETAILS A - 149
Condition Codes:
The condition codes are not affected by this instruction.
Instruction Format:
LUA ea,D
Opcode:
Instruction Fields:
ea=5-bit Effective Address=MMRRR,
D=4-bit destination address register=dddd
Effective
Addressing Mode M M M R R R Dest. Addr. Reg. D d d d d
(Rn)-Nn 0 0 0 r r r R0–R7 0 n n n
(Rn)+Nn 0 0 1 r r r N0–N7 1 n n n
(Rn)- 0 1 0 r r r
(Rn)+ 0 1 1 r r r
where “rrr” refers to a source address register R0–R7
where “nnn” refers to a destination address register R0–R7 or N0–N7
Timing: 4 oscillator clock cycles
Memory: 1 program word
MR CCR
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
LF DM T ** S1 S0 I1 I0 S L E U N Z V C
23 16 15 8 7 0
00000100010MMRRR0001dddd
LUA Load Updated Address LUA