SAB80C517_05 Datasheet, PDF(182/323 Page) Siemens Semiconductor Group – 8-Bit CMOS Single-Chip Microcontroller

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SAB80C517_05 Datasheet, PDF (182/323 Pages) Siemens Semiconductor Group – 8-Bit CMOS Single-Chip Microcontroller

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Instruction Set

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 âJMPADRâ is at program memory location 0123H. The instruction

AJMP JMPADR

Operation:

is at location 0345H and will load the PC with 0123H.

AJM P

(PC) â (PC) + 2

(PC10-0) â page address

Encoding:

Bytes:

Cycles:

a10 a9 a8 0 0 0 0 1

2

2

a7 a6 a5 a4 a3 a2 a1 a0

Semiconductor Group

183

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