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AJMP
addr11
Function:
Absolute jump
Description:
AJMP transfers program execution to the indicated address, which is formed at run-
time by concatenating the high-order five bits of the PC ( after incrementing the PC
twice), op code bits 7-5, and the second byte of the instruction. The destination must
therefore be within the same 2K block of program memory as the first byte of the
instruction following AJMP.
Example:
The label "JMPADR" is at program memory location 0123 H . The instruction
AJMP
is at location 0345 H and will load the PC with 0123 H .
Operation:
AJM P
(PC) ← (PC) + 2
(PC10-0) ← page address
Encoding:
a10 a9 a8 0
Bytes:
2
Cycles:
2
Semiconductor Group
JMPADR
0 0 0 1
a7 a6 a5 a4
a3 a2 a1 a0
*
141
Instruction Set
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