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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PROGRAM BRANCHING
6.3.3 | CJNE Instruction
‘Compare and jump if not equal’ or CJNE is a frequently used instruction in MCS-51 programming. All
addressing modes and variations of this instruction are presented through Table 6.3. In this case, the source
operand is virtually subtracted from the destination operand and the action is implemented. During this,
virtual subtraction contents of the operands are assumed as unsigned positive integer values. As it is a virtual
subtraction, neither the source nor the destination operand is changed. However, the carry fl ag refl ects the
status of this virtual subtraction. No other fl ags are aff ected. Note ...
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