AT&T 3B2/300 Technical Reference Manual page 443

FUNCTIONAL D E S C R I P T I O N - - - - - - - - - - - - - - - - - - - - - - - - - -
CM195AE GENERAL PURPOSE SYNCHRONOUS CONTROLLER
PERIPHERAL INPUT/OUTPUT BUS INTERFACE
(BACKPLANE CONNECTOR)
14
.
80C186 CPU
,
16K X 8
AND
23 READ ONLY
.
16
MEMORY
MISCELLANEOUS
,
-
-
.
LOGIC CIRCUITS
,
16
.
,
-
ADDRESS
BITS 23-01[1]
DATA
o IDl<VECTOR
BITS 15-00[! J
R GISTER
o PAGE REGISTER
'
o
PCSR
ADDRESS
CONTROL
BUFFER
DATA
TRANSACTION
BYTE
ROTATE
8237
-
8.
DIRECT
-
,
-
~
MEMORY 8.
ACCESS
CONTROLLER
1/0
-
768K
COUNTER
~
TIMER
~ DYNAMIC RANDOM
ACCESS MEMORY
- -
f
DUART
Figure 3-59: CMl 95AE GPSC Card-Functional Block Diagram
3-190 TECHNICAL REFERENCE MANUAL
RS-232
I
RS-422
I
RS-232
RS-422
J
CHA
(JOI)
+--+---1--....;-.
I
I
J
CHB
- - - - - - - - ()02)