Datasheet

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Instruction Set Description

4.6.2.28 JMP

JMP Jump unconditionally

JMP label

Syntax

Operation PC + (2 × Offset) → PC

Description The signed 10-bit word offset contained in the instruction is multiplied by two, sign

extended, and added to the 20-bit PC. This means an unconditional jump in the range

–511 to +512 words relative to the PC in the full memory. The JMP instruction may be

used as a BR or BRA instruction within its limited range relative to the PC.

Status Bits Status bits are not affected

Mode Bits OSCOFF, CPUOFF, and GIE are not affected.

Example The byte STATUS is set to 10. Then a jump to label MAINLOOP is made. Data in lower

64KB, program in full memory range.

MOV.B #10,&STATUS ; Set STATUS to 10

JMP MAINLOOP ; Go to main loop

Example The interrupt vector TAIV of Timer_A3 is read and used for the program flow. Program in

full memory range, but interrupt handlers always starts in lower 64KB.

ADD &TAIV,PC ; Add Timer_A interrupt vector to PC

RETI ; No Timer_A interrupt pending

JMP IHCCR1 ; Timer block 1 caused interrupt

JMP IHCCR2 ; Timer block 2 caused interrupt

RETI ; No legal interrupt, return

191

SLAU144J–December 2004–Revised July 2013 CPUX

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