Architecture,
Assembly
Language,
And
Hardware
Interfacing
(Paperback)
What Are SFRs?
The 8051
is a
flexible
microcontroller
with a
relatively
large
number
of modes
of
operations.
Your
program
may
inspect
and/or
change
the
operating
mode of
the 8051
by
manipulating
the
values
of the
8051's
Special
Function
Registers
(SFRs).