4.5 Serial ATA Interface Signals–Table 4
Name
Type
Description
SATA3GP /
GPIO37
I
Serial ATA 3 General Purpose:
Same function as SATA0GP,
except for SATA Port 3. If interlock switches are not required, this
pin can be configured as GPIO37. NOTE: This signal can also be
used as GPIO37.
SATA4GP /
GPIO16
I
Serial ATA 4 General Purpose:
Same function as SATA0GP,
except for SATA Port 4.
SATA5GP /
GPIO49
I
Serial ATA 5 General Purpose:
Same function as SATA0GP,
except for SATA Port 5.
SATALED#
OD O
Serial ATA LED:
This signal is an open-drain output pin driven
during SATA command activity. It is to be connected to external
circuitry that can provide the current to drive a platform LED. When
active, the LED is on. When tri-stated, the LED is off. An external
pull-up resistor to Vcc3_3 is required.
SCLOCK/
GPIO22
OD O
SGPIO Reference Clock:
The SATA controller uses rising edges
of this clock to transmit serial data, and the target uses the falling
edge of this clock to latch data. If SGPIO interface is not used, this
signal can be used as a GPIO.
SLOAD/GPIO38
OD O
SGPIO Load:
The controller drives a ‘1’ at the rising edge of
SCLOCK to indicate either the start or end of a bit stream. A 4-bit
vendor specific pattern will be transmitted right after the signal
assertion. If SGPIO interface is not used, this signal can be used as a
GPIO.
SDATAOUT0/
GPIO39
SDATAOUT1/
GPIO48
OD O
SGPIO Dataout:
Driven by the controller to indicate the drive
status in the following sequence: drive 0, 1, 2, 3, 4, 5, 0, 1, 2... If
SGPIO interface is not used, the signals can be used as GPIO.
