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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GENERAL ARCHITECTURE
2.5.2 | Bit-Addressable Area
Next 16 bytes after four register banks, starting from address 20H to 2FH, contain 128 bits in total and are
designated as bit-addressable area. Each one of these 128 bits has an individual bit address varying from 00H
to 7FH. is area is expected to store bit variables for the application program.
In many control operations, the data might be of a single bit rather than a full byte. For example, the
condition of a motor, running or not, may be represented through a single bit. Using a full byte for storage
of this information is not necessary. Bit-addressable area helps the software developer ...
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