Seagate ST318436LW - Page 86

76 Barracuda 18XL Product Manual, Rev. A
Table 13e: “N” model, single-ended I/O, 50 conductor, signal/contact assignments
*CAUTION:
Connector contact 25 must not be connected to ground at the host end or the drive end of the
cable. If the I/O cable should accidently be plugged in upside down, terminator power on pin 26
will be shorted to ground.
Notes [ ]
: See page following Table 13f.
Signal
name [1]
Connector
contact
number [13]
Cable
conductor
number [12]
Connector
contact
number [13]
Signal
name [1]
GND 1 1 2 2 –DB0
GND 3 3 4 4 –DB1
GND 5 5 6 6 –DB2
GND 7 7 8 8 –DB3
GND 9 9 10 10 –DB4
GND 11 11 12 12 –DB5
GND 13 13 14 14 –DB6
GND 15 15 16 16 –DB7
GND 17 17 18 18 –DBP
GND19192020GND
GND21212222GND
GND23232424GND
NC [10] 25* 25 26 26 TERMPWR
GND27272828GND
GND29293030GND
GND 31 31 32 32 –AT N
GND33333434GND
GND 35 35 36 36 –BSY
GND 37 37 38 38 –ACK
GND 39 39 40 40 –RST
GND 41 41 42 42 –MSG
GND 43 43 44 44 –SEL
GND 45 45 46 46 –C/D
GND 47 47 48 48 –REQ
GND 49 49 50 50 –I/O