Seagate ST15150N Product Manual - Page 86

drive end of the cable. If you accidentally plug the I/O connector

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76 ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D Table 14. Single-ended cable pin assignments (non-shielded connector) for ST15150N drives Signal Pin number Signal Pin number −DB (0) 2 GROUND 28 −DB (1) −DB (2) −DB (3) −DB (4) −DB (5) 4 GROUND 30 6 −ATN 32 8 GROUND 34 10 −BSY 36 12 −ACK 38 −DB (6) 14 −RST 40 −DB (7) 16 −MSG 42 −DB (P) 18 −SEL 44 GROUND 20 −C/D 46 GROUND 22 −REQ 48 GROUND 24 −IO 50 TERMPWR 26 Notes: 1. All odd pins except pin 25 are connected to ground. Pin 25 is left open. Caution. Pin 25 must not be connected to ground at the host end or the drive end of the cable. If you accidentally plug the I/O connector in upside down, terminator power on pin 26 will be shorted to ground. 2. The minus sign preceding a signal name indicates that signal is active low.

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76
ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D
Table 14.
Single-ended cable pin assignments
(non-shielded connector) for ST15150N drives
Signal
Pin number
Signal
Pin number
-
DB (0)
2
GROUND
28
-
DB (1)
4
GROUND
30
-
DB (2)
6
-
ATN
32
-
DB (3)
8
GROUND
34
-
DB (4)
10
-
BSY
36
-
DB (5)
12
-
ACK
38
-
DB (6)
14
-
RST
40
-
DB (7)
16
-
MSG
42
-
DB (P)
18
-
SEL
44
GROUND
20
-
C/D
46
GROUND
22
-
REQ
48
GROUND
24
-
IO
50
TERMPWR
26
Notes:
1. All odd pins except pin 25 are connected to ground. Pin 25 is left open.
Caution.
Pin 25 must not be connected to ground at the host end or the
drive end of the cable. If you accidentally plug the I/O connector
in upside down, terminator power on pin 26 will be shorted to
ground.
2.
The minus sign preceding a signal name indicates that signal is active low.