INSTRUCTION DESCRIPTIONS
MOTOROLA INSTRUCTION SET DETAILS A - 121
Instruction Format:
JScc ea
Opcode:
Instruction Fields:
cc=4-bit condition code=CCCC,
ea=6-bit Effective Address=MMMRRR
Effective
Addressing Mode MMMRR R Mnemonic C C C C Mnemonic C C C C
(Rn)–Nn 000r r r CC (HS) 0 0 0 0 CS (LO) 1 0 0 0
(Rn)+Nn0 001r r r GE 000 1 LT 1 00 1
(Rn)– 010r r r NE 001 0 EQ 101 0
(Rn)+ 011r r r PL 001 1 MI 1 01 1
(Rn) 100r r r NN 010 0 NR 110 0
(Rn+Nn) 101r r r EC 010 1 ES 11 0 1
–(Rn) 111r r r LC 0 110 LS 1 1 1 0
Absolute address 11000 0 GT 011 1 LE 11 1 1
where “rrr” refers to an address register R0–R7
Timing: 4+jx oscillator clock cycles
Memory: 1+ea program words
JScc Jump to Subroutine Conditionally JScc
23 16 15 8 7 0
OPTIONAL EFFECTIVE ADDRESS EXTENSION
0000101111MMMRRR1010CCCC