Hitachi ULTRASTAR 15K450 HUS154530VLF400 - Manual (Page 36)

Hitachi Ultrastar 15K450 (FC-AL) Hard Disk Drive Specification
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Note: The guide pins are connected to 5V ground.
* Definition changes for SFF-8067
7.1.2 Voltage and Ground Signals
The 12 V and 5 V contacts provide all of the voltages required by the drive. The two voltages share a common ground plane to
which all of the ground contacts are connected.
7.1.3 Fault LED Out
As specified in the SFF-8045 specification, the Fault LED is driven under the following conditions:
•both enable bypass signals are asserted by the drive
• an internal failure has been detected by the drive
• the drive has been instructed by the host to turn on the LED
The drive provides an open-collector TTL driver with up to 30mA of current sink capability to the drive fault LED. The cath-
ode of the LED should be connected to this signal. The LED and the current-limiting resistor must be provided by the enclo-
sure.
7.1.4 Ready LED Out
As specified in the SFF-8045 specification, the Ready LED Out signal has the following definition (per the Hot Plug Imple-
mentation):
• Drive not mated:
– The signal is de-asserted (i.e. high). The LED is off.
• Drive mated, motor not spinning:
– The signal is asserted (i.e. low) for a period long enough to be detected by the observer whenever a SCSI command is
received. The LED is normally off.
• Drive mated, spinning up or down:
– The signal is alternately asserted and de-asserted for a period of 1/2 second. The LED is flashing.
• Drive mated, motor spinning:
– The signal is normally asserted continuously. The signal is de-asserted for a period long enough to be detected by an
observer, whenever a SCSI command is received. The LED is usually on.
The drive provides an open-collector TTL driver with up to 30mA of current sink capability to the Ready LED Out signal. The
cathode of the LED should be connected to this signal. The LED and the current-limiting resistor must be provided by the
enclosure.
Sel_4/-P_ESI_4 14* 34 -Port 2_Out
Sel_3/-P_ESI_3 15* 35 5V Ground
Fault LED Out 16 36* Sel_2/-P_ESI_2
Dev_Ctrl_Code_2 17 37* Sel_1/-P_ESI_1
Dev_Ctrl_Code_1 18 38* Sel_0/-P_ESI_0
5 Volts 19 39 Dev_Ctrl_Code_0
5 Volts 20 40 5V Charge