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Technical Reference Guide
Compaq Personal Computers
Original - December 2000
L-5
L.5.2 INTERNAL 50-PIN ULTRA SCSI CONNECTOR
The card provides one internal 50-pin header-type Ultra SCSI connector. Internal cabling to this
connector should consists of an unshielded connector with a 50-conductor flat cable as specified in
ANSI standard X3T9.2/375R.
Figure L–4. Internal 50-Pin Ultra SCSI Connector
Table L–4. Internal 50-Pin Ultra SCSI Connector Pinout
Table L-4.
Internal 50-Pin Ultra SCSI Connector Pinout
Pin Signal Function Pin Signal Function
1 GND Ground 2 DB0- Data Bit 0
3 GND Ground 4 DB1- Data Bit 1
5 GND Ground 6 DB2- Data Bit 2
7 GND Ground 8 DB3- Data Bit 3
9 GND Ground 10 DB4- Data Bit 4
11 GND Ground 12 DB5- Data Bit 5
13 GND Ground 14 DB6- Data Bit 6
15 GND Ground 16 DB7- Data Bit 7
17 GND Ground 18 DBP Data Bus Pulse
19 GND Ground 20 GND Ground
21 GND Ground 22 CS Cable Sense
23 Open Open 24 Open Open
25 Open Open 26 TERMPWR Termination Power
27 Open Open 28 Open Open
29 GND Ground 30 GND Ground
31 GND Ground 32 ATN- Attention
33 GND Ground 34 GND Ground
35 GND Ground 36 BSY- Busy
37 GND Ground 38 ACK- Acknowledge
39 GND Ground 40 SBRST- Reset
41 GND Ground 42 MSG- Message Activity
43 GND Ground 44 SEL- Select
45 GND Ground 46 C-/D Control/Data Transfer Indicator
47 GND Ground 48 REQ- Request
49 GND Ground 50 I-/O Input/Output Indicator
Pin 1
Pin 2
Pin 50
Pin 49