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