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TX+ / TX- (SATA)
These signals are the outbound high-speed differential signals that are connected to the serial ATA cable
RX+ / RX- (SATA)
These signals are the inbound high-speed differential signals that are connected to the serial ATA cable.
5V Pre-charge
+5 Vdc that is available on the extended pins. It is used for Pre-charge when connected to backplane incorporated
feature.
12V Pre-charge
+12 Vdc that is available on the extended pins. It is used for Pre-charge when connected to backplane incorporated
feature.
Out-of-Band Signaling (SATA)
COMRESET/COMINIT
t1
t2
t3
t4
COMWAKE
Figure 4 The Timing of COMRESET, COMINIT and COMWAKE
PARAMETER DESCRIPTION
Nominal (ns)
t1
ALIGN primitives
106.7
t2
Spacing
320.0
t3
ALIGN primitives
106.7
t4
Spacing
106.7
Table 12 Parameter Descriptions
Voltage and Ground Signals
The 12V and 5V 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.
Ready LED Output
The drive provides an open-drain driver with 15mA of current sink capability to the Ready LED Output 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.
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Western Digital Ultrastar DC HC310 SATA Product Manual