AT&T 3B2/300 Technical Reference Manual page 501

FUNCTIONAL D E S C R I P T I O N - - - - - - - - - - - - - - - - - - - - - - - - - - -
CM195Y ENHANCED PERIPHERAL PORT CONTROLLER
PERIPHERAL INPUT/OUTPUT BUS INTERFACE
(BACKPLANE CONNECTOR)
14
I
80186 CPU
.
SK X 16
AND
20
READ ONLY
I
16
MEMORY
MISCELLANEOUS
.
I
LOGIC CIRCUITS
-
.
16
-
I
.
-
16
I
-
o ID i<VECTOR
.
-
64K X 16
R GISTER
16
DYNAMIC RANDOM
o PAGE REGISTER
ACCESS MEMORY
oPCSR
-
.
-
-
,
-
ADDRESS DATA
BITS 19-00[1]
BITS 15-00(1]
CHIP
SELECT 4[0]
SDO
I'\.
TTY?l 8-PIN
- - -
MODULAR
-
-
-
4
DUART 0
CONNECTOR
I -
.
8
SDI
TTY?2 8-PIN
-
.
-
-
- -
MODULAR
- -
-
.
-
CONNECTOR
CHIP
SELECT 5[0]
r'\..
SD2
TTY?3 8-PIN -
MODULAR
4
DUART 1
CONNECTOR
I -
CHIP
8
TTY?4 8-PIN
-
I
SD3
SELECT 6[0]
-
-
MODULAR
-
LINE
-
-
DRIVERS
CONNECTOR
AND
r\..
-
SD4
RECEIVERS
TTY?5 8-PIN
MODULAR
4 DUART 2
CONNECTOR
.
,
8
TTY?6 8-PIN
CHIP
-
I
SD5
MODULAR
-
SELECT 7[0]
.
CONNECTOR
SD6
TTY?7 8-PIN
MODULAR
4
CONNECTOR
.
DUART 3
.
-
s.
SD7
TTY?8 8-PIN
.
-
MODULAR
CONNECTOR
Figure 3-75: CM195Y EPORTS Card - Functional Block Diagram
3-248 TECHNICAL REFERENCE MANUAL