INSTRUCTION DESCRIPTIONS
MOTOROLA
INSTRUCTION SET DETAILS A - 173
Instruction Format:
( . . . . . ) ea
Opcode:
Instruction Fields:
ea=5-bit Effective Address=MMRRR
Effective
Addressing Mode M M R R R
(Rn)-Nn 0 0 r r r
(Rn)+Nn 0 1 r r r
(Rn)- 1 0 r r r
(Rn)+ 1 1 r r r
where “rrr” refers to an address register R0-R7
Timing:
mv oscillator clock cycles
Memory:
mv program words
23 16 15 8 7 0
0 0 1 0 0 0 0 0 0 1 0 M M R R R INSTRUCTION OPCODE
UAddress Register Update U