Logic Use's Guide Network Adapter LSI8751D
Operational Environment 3-5
3.2.2 The SCSI Interface
The SCSI interface operates as 16-bit, synchronous or asynchronous,
High Voltage Differential (HVD) bus, and supports SCSI-3 protocols and
16-bit arbitration. The signal deļ¬nitions conform to the SCSI-2 differential
standard. The interface is made through connectors J2 and J3.
Connector J2 is a 68-pin, high density, right-angle receptacle used for
internal connections. Connector J3 is a 68-pin, high density, right-angle
receptacle that protrudes through the back panel bracket. SCSI
termination is provided through a HVD plug-in terminator. SCSI
termination power is also supplied by the board. Table Table 1.4 shows
the signal assignments for J2 and J3 SCSI HVD connectors.
Table 3.3 PCI Connector JI (Bottom)
Signal Name
1
1. Shaded signals are not connected.
Pin Signal Name
1
Pin Signal Name
1
Pin Signal Name
1
Pin
TRST/ 1 GNT/ 17 +3.3 V 33 AD09 49
+12V 2 GND 18 FRAME/ 34 KEYWAY 50
TMS 3 RESERVED 19 GND 35 KEYWAY 51
TDI 4 AD30 20 TRDY/ 36 C_BE0/ 52
+5 V 5 +3.3 V 21 GND 37 +3.3V 53
INTA/ 6 AD28 22 STOP/ 38 AD06 54
INTC/ 7 AD26 23 +3.3 V 39 AD04 55
+5 V 8 GND 24
SDONE 40 GND 56
RESERVED 9 AD24 25 SBO/ 41 AD02 57
3 V/5 V 10 IDSEL 26 GND 42 AD00 58
RESERVED 11 +3.3 V 27 PAR 43 3 V/5 V 59
KEYWAY 12 AD22 28 AD15 44
REQ64/ 60
KEYWAY 13 AD20 29 +3.3 V 45 +5 V 61
RESERVED 14 GND 30 AD13 46 +5 V 62
RST/ 15 AD18 31 AD11 47
3 V/5 V 16 AD16 32 GND 48