Architecture,
Assembly
Language,
And
Hardware
Interfacing
(Paperback)
One of the 8051’s many powerful features is it’s integrated
UART,
otherwise
known as
a serial
port.
The fact
that the
8051 has
an
integrated
serial
port
means
that you
may very
easily
read and
write
values
to the
serial
port. If
it were
not for
the
integrated
serial
port,
writing
a byte
to a
serial
line
would be
a rather
tedious
process
requiring
turning
on and
off one
of the
I/O
lines in
rapid
succession
to
properly
"clock
out"
each
individual
bit,
including
start
bits,
stop
bits,
and
parity
bits.