AT&T 3B2/300 Technical Reference Manual page 451

FUNCTIONAL D E S C R I P T I O N - - - - - - - - - - - - - - - - - - - - - - - - - - -
CM195A Y ENHANCED PERIPHERAL PORT CONTROLLER
PERIPHERAL INPUT/OUTPUT BUS INTERFACE
(BACKPLANE CONNECTOR)
14
.
,
SK X 16
80186 CPU
29
READ ONLY
AND
MISCELLANEOUS
,
-
I~
MEMORY
LOGIC CIRCUITS
,
16
-
.
,
16
o IDifcVECTOR
.
128K
R GISTER
,
o PAGE REGISTER
(4 • 64K X 4)
o PCSR
16 DYNAMIC RANDOM
.
ACCESS MEMORY
,
ADDRESS DATA
BITS 19-00(1] BITS 15-00(1]
CHIP
SELECT 4(0]
SDO
'
TTY?l 8-PIN
- -
MODULAR
-
-
-
-
4
DUART 0
CONNECTOR
.
-
,
8
SDI
TTY?2 8-PIN
.
-
-
MODULAR
CHIP
.
CONNECTOR
SELECT 5(0]
t\..
SD2
TTY?3 8-PIN -
- -
MODULAR
4
-
-
DUART 1
CONNECTOR .
,
8
CHIP
.
SD3
TTY?4 8-PIN
-
,
-
SELECT 6(0]
-
-
LINE
-
MODULAR
DRIVERS
CONNECTOR
AND
RECEIVERS
'
SD4
TTY?5 8-PIN
-
MODULAR
4
DUART 2
CONNECTOR
,
8
TTY?6 8-PIN
-
CHIP
-
-
SD5
MODULAR
SELECT 7(0]
,
CONNECTOR
SD6
TTY?7 8-PIN
-
-
MODULAR
4 .
DUART 3
CONNECTOR
,
8
TTY?S 8-PIN
.
SD7
-
~
MODULAR
CONNECTOR
Figure 3-61: CM195AY EPORTS Card - Functional Block Diagram
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