May 2024
Intermediate to advanced
534 pages
17h 58m
English
book
8051 Microcontroller, Internals, Instructions, Programming and Interfacing, 2nd Edition
by Subrata Ghoshal
Content preview from 8051 Microcontroller, Internals, Instructions, Programming and Interfacing, 2nd Edition
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119
9.4 | XRL Instruction
Just as one of the many usage of AND operation is to clear some target bits of a register or a memory location
and that of OR operation is to set some target bits of a register or a memory location, similarly, in the case of
XOR operation, one of its usages is to toggle some bits of a register or a memory location.
Just like the previous two cases, the XOR operation of MCS-51 also allows six variations and four
addressing modes as explained in Table 9.4. As an example case, XRL A, @R1 instruction is illustrated
in Fig. 9.4. is is a 1-byte, one-cycle instruction with the opcode 67H. Assuming that the accumulator ...
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