Author :
Craig
Steiner
Source :
8052.com
Book :
The
8051/8052
Microcontroller:
Architecture,
Assembly
Language,
And
Hardware
Interfacing
(Paperback)
External
Direct
External
Memory
is
accessed
using a
suite of
instructions
which
use what
I call
"External
Direct"
addressing.
I call
it this
because
it
appears
to be
direct
addressing,
but it
is used
to
access
external
memory
rather
than
internal
memory.
There
are only
two
commands
that use
External
Direct
addressing
mode:
MOVX A,@DPTR
MOVX @DPTR,A
>>>
Enter
here for
detail
on
"External
Direct Addressing"<<<
<<< Click
here to
come
back on
(8051
-
Addressing
Modes)
