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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11-14
THE
x86 MICROPROCESSORS
RTS (Request to Send) This output signal is a general-purpose, one-bit output port.
It can be set low by programming the appropriate bit in the Command instruction. The
RTS output signal is normally used for modem control.
CTS (Clear to Send) A low on this input enables the 8251 to transmit serial data if the
T × Enable bit in the command byte is set to a ‘one’. If either a T × Enable OFF or CTS
OFF occurs while the transmitter is in operation, the transmitter will transmit all the data
in the USART written prior to the Transmitter Disable command before shutting down.
11.3.3 | How This Chip Operates
Like any other ...
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