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
6.3.5 | Labels in Program Listing
So far in our examples, we have used the complete target address or off set byte for jump instructions like
CJNE A, 06H, 0FBH. Although it is a valid format, however, calculating off set bytes or including direct
addresses may not make a program readable or easier to debug.
For the ease of software development, it is customary to use labels to mark diff erent locations of the
program memory. Labels are alphanumeric characters, starting with alphabets. ey are terminated by a colon (:).
For example, execution of the following instructions
Label1: MOV R7, #02H
DJNZ R7, Label1
Label2: MOV ...
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