AT&T 3B2/300 Technical Reference Manual page 419

FUNCTIONAL D E S C R I P T I O N - - - - - - - - - - - - - - - - - - - - - - - - - - -
CM195A NETWORK INTERFACE
PERIPHERAL INPUT/OUTPUT BUS INTERFACE
(BACKPLANE CONNECTOR)
14 .
,
SK X 16
80186 CPU
2?
READ ONLY
AND
16
MEMORY
MISCELLANEOUS
.
LOGIC CIRCUITS
16
-
.
-
.
o IDiVECTOR
16
.
R GISTER
,
o PAGE REGISTER
16K X 16
o PCSR ST A TIC RANDOM
I~ ACCESS MEMORY
ADDRESS
DATA
BITS 19-00[1]
BITS 15-00[1]
r---------------
--
-----------------------,
NETWORK INTERFACE
I
82586
ETHERNET
CONTROLLER
TRANSMIT RECEIVE
DATA DATA
I~
COLLISION DETECTED (CDS[!])
PIN 2
-
-
I
82501
TRANSMIT DATA (TDS[l])
SERIAL
PIN 3
INTERFACE
RECEIVE DATA (RDS[!])
I
I
PIN 5
-
I
+12V (VXCS)
I
PIN 13
I
I
L------------------------------------------~
Figure 3-53: CMl 95A NI Card - Functional Block Diagram
3-166 TECHNICAL REFERENCE MANUAL
-
-
DROP
CABLE
TO/FROM
TRANSCEIVER
CIRCUIT