Intel MCS48 User Manual page 397

8291
Appendix
D
FUNCTIONAL PARTITIONS
=&
DEVICE
FUNCTIONS
£®tt
3
-A
TV
-J-\
:
—
v
C@=
=&
-t—i/
-A
DEVICE (APPARATUS)
INTERFACE
FUNCTIONS
(8292
ONLY)
L
OR
LE
3
K®$
£
MESSAGE
CODING
c©=
MCS'"
SYSTEM
A
- CAPABILITY DEFINED BY THE
488-1975
STANDARD.
B
- CAPABILITY DEFINED BY THE DESIGNER.
1
- INTERFACE BUS SIGNAL
LINES.
2
-
REMOTE INTERFACE MESSAGES TO
AND FROM INTERFACE FUNCTIONS.
3
-
DEVICE
DEPENDENT MESSAGES TO
AND FROM
DEVICE FUNCTIONS.
4
- STATE LINKAGES BETWEEN INTERFACE FUNCTIONS.
5
- LOCAL MESSAGES BETWEEN DEVICE FUNCTIONS
AND
INTERFACE
FUNCTIONS (MESSAGES
TO INTERFACE FUNCTIONS
ARE
DEFINED,
MESSAGES FROM INTERFACE FUNCTIONS EXIST
ACCORDING TO THE
DESIGNER'S CHOICE).
6
-
CONTROL MESSAGES
(8292
ONLY).
Figure
D.1.
Functional Partition
Within a Device.
8-107
00229A