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8051 Microcontroller (Internals, Instructions, Programming and Interfacing)
book

8051 Microcontroller (Internals, Instructions, Programming and Interfacing)

by Subrata Ghosal
May 2024
Intermediate to advanced content levelIntermediate to advanced
503 pages
17h 2m
English
Pearson India
Content preview from 8051 Microcontroller (Internals, Instructions, Programming and Interfacing)
443
APPENDIX C
MCS®-51 PROGRAMMER’S GUIDE AND INSTRUCTION SET
MOVX <dest-byte>,<src-byte>
Function: Move External
Description: e MOVX instructions transfer data between the Accumulator and a byte of external
data memory, hence the “X” appended to MOV.  ere are two types of instructions,
diff ering in whether they provide an eight-bit or sixteen-bit indirect address to the
external data RAM.
In the fi rst type, the contents of R0 or Rl in the current register bank provide an
eight-bit address multiplexed with data on P0. Eight bits are suffi cient for external
I/O expansion decoding or for a relatively small RAM array. For somewhat larger ...
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Publisher Resources

ISBN: 9781282655034Publisher Website