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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PERIPHERAL INTERFACING–III 11-19
OE (Overrun Error) This flag is set when the processor does not read a character before
the next one becomes available. In the case that this bit gets set, the previous overrun
character is lost.
FE (Framing Error) This is applicable for asynchronous communication only. This flag
is set when a valid stop bit is not detected at the end of every character.
Syndet–Synch Detect This pin is used in synchronous mode for sync detect and is used
in asynchronous mode for break detect.
DSR (Data Set Ready) This bit indicates that DSR is at zero level.
11.3. 6 | Programming the 8251
Now that we have got an idea of the important ...
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