AT&T 3B2/300 Technical Reference Manual page 457

FUNCTIONAL D E S C R I P T I O N - - - - - - - - - - - - - - - - - - - - - - - - - -
CM195B/CM195BA PERIPHERAL PORT CONTROLLER
'
PERIPHERAL INPUT/OUTPUT BUS INTERFACE
(BACKPLANE CONNECTOR)
14
80186 CPU
.
SK X 16
AND
20
READ ONLY
.
16
MISCELLANEOUS
--,
-
.
MEMORY
LOGIC CIRCUITS
-
.
.
1~
-
7
-
16
~
-
o IDi<VECTOR
16K X 16
R GISTER
ST A TIC RANDOM
o PAGE REGISTER
1§
ACCESS MEMORY
o PCSR
- r
ADDRESS
DATA
BITS 19-00[1
J
BITS 15-00[1
J
CHIP
~
SELECT 4(0]
SDO
TTY?l 8-PIN
-
MODULAR
-
-
4
DUART 0
CONNECTOR
.
,
-
8
SDI LINE
TTY?2 8-PIN
.
DRIVERS
MODULAR
.
AND
CONNECTOR
CHIP
RECEIVERS
SELECT 5(0]
~
SD2
TTY?3 8-PIN
4
-
-
MODULAR
DUART 1
CONNECTOR
.
-
r
-
8
SD3
CHIP
. -
TTY?4 8-PIN
SELECT 6(0]
.
-
-
-
MODULAR
-
CONNECTOR
I
LINE DRIVERS/RECEIVERS
TTY?5
DATA
36-PIN PARALLEL
AND
(CENTRONICS)
CONTROL
CONNECTOR
Figure 3-63: CM195B/CM195BA PORTS Card - Functional Block Diagram
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