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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Why is the provision given for selection? e reader may ask why this provision was planned in MCS-51. As a
matter of fact, it helps the designer to interface diff erent types of devices through interrupt. A low-level triggered
interrupt signal may take some time for its recognition, as the processor may be busy in completing the execution
of an instruction, say MUL, which takes 4 cycles to complete its execution. erefore, a low-level signal must be
maintained low for a minimum duration by the interrupting device (interrupt signal generating device).
On the other hand, a falling-edge type signal need not keep on generating multiple falling ...
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