Seagate ST310014ACE Product Manual - Page 25

Cable-select option, Ultra ATA/100 cable

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ST310014ACE Product Manual, Rev. B 17 2.2.2 Cable-select option Computers that use cable-select determine the master and slave drives by selecting or deselecting pin 28, CSEL, on the interface bus. Master and slave drives are determined by their physical position on the cable. To enable cable select, set a jumper on pins 5 and 6 as shown in Figure 2 on page 16. Refer to your computer manual to determine whether your computer supports this option. 2.2.3 Ultra ATA/100 cable An 80-conductor 40-pin cable is required to run Ultra DMA mode 3, mode 4 and mode 5. This cable uses even-numbered conductors connected to the ground pins to improve signal integrity. Notes: 1. The drive supports both host and drive cable detection. The host detects the 80-conductor cable by sampling pin 34, CBLID-, on the interface bus. The drive detects the 80-conductor cable by sensing a capacitor at the host side through the CBLID- signal. The result is reported in a Fast Rise Detected bit (bit 13 of word 93 in the Identify drive parameter block). 2. When using a 40-pin 80-conductor cable, attach the blue connector to the motherboard, the black connector to the master drive, and the grey connector to the slave.

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ST310014ACE Product Manual, Rev. B
17
2.2.2
Cable-select option
Computers that use cable-select determine the master and slave drives
by selecting or deselecting pin 28, CSEL, on the interface bus. Master
and slave drives are determined by their physical position on the cable.
To enable cable select, set a jumper on pins 5 and 6 as shown in Figure
2 on page 16. Refer to your computer manual to determine whether your
computer supports this option.
2.2.3
Ultra ATA/100 cable
An 80-conductor 40-pin cable is required to run Ultra DMA mode 3, mode
4 and mode 5. This cable uses even-numbered conductors connected
to the ground pins to improve signal integrity.
Notes:
1.
The drive supports both host and drive cable detection. The host
detects the 80-conductor cable by sampling pin 34, CBLID–, on
the interface bus. The drive detects the 80-conductor cable by
sensing a capacitor at the host side through the CBLID– signal.
The result is reported in a Fast Rise Detected bit (bit 13 of word
93 in the Identify drive parameter block).
2.
When using a 40-pin 80-conductor cable, attach the
blue
con-
nector to the motherboard, the
black
connector to the master
drive, and the
grey
connector to the slave.