AT&T 3B2/300 Technical Reference Manual page 507

FUNCTIONAL D E S C R I P T I O N - - - - - - - - - - - - - - - - - - - - - - - - - -
CM521A DIFFERENTIAL SMALL COMPUTER SYSTEMS INTERFACE HOST ADAPTER
PERIPHERAL INPUT/OUTPUT BUS INTERFACE
(BACKPLANE CONNECTOR)
14
.
80186 CPU
,
64K X 8
AND
20
READ ONLY
MISCELLANEOUS
.
16
,
MEMORY
LOGIC CIRCUITS
,
16
.
16
64K X 16
.
-
o ID icVECTOR
,
ST A TIC RANDOM
R GISTER
ACCESS MEMORY
o PAGE REGISTER
1~ -
o PCSR
.
-
ADDRESS DATA
I
BITS 19-00[1) I
1
i,
BITS 15-00[1)
SCSI PROTOCOL CONTROLLER
AND MISCLLANEOUS LOGIC CIRCUITS
I~
h
If
I'
50-PIN SCSI BUS O 50-PIN SCSI BUS 1
CONNECTOR CONNECTOR
Figure 3-77: CM521A Differential SCSI Host Adapter Card - Functional Block Diagram
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