May 2024
Intermediate to advanced
889 pages
30h 8m
English
book
The X 86 Microprocessors: Architecture, Programming and Interfacing (8086 to Pentium) 2nd Edition by Pearson
by Lyla B. Das
Content preview from The X 86 Microprocessors: Architecture, Programming and Interfacing (8086 to Pentium) 2nd Edition by Pearson
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THE 8051 MICROCONTROLLER: THE PROGRAMMER’S PERSPECTIVE 19-37
COUNT: INC R4 ;increment R4 is a ‘0’ is obtained
SJMP BACK ;jump to BACK
HERE: SJMP HERE ;stay in HERE
END
19.10 | Port Programming
We have seen many of the important instructions, but a few more are left. They are the
logical and rotation instructions, and the types involving call and return.
But before we go to that, let us learn programming involving the GPIO (General
Purpose I/O) ports of the chip. There are four ports for the 8051 as can be seen in the
functional pin diagram in Fig. 19.14.
This diagram is meant only for understanding the port structure of 8051. You can
ignore ...
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