Signal Description
60 Datasheet
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.
SATA4GP /
GPIO16 /
I
Serial ATA 4 General Purpose: Same function as SATA0GP,
except for SATA Port 4.
If interlock switches are not required, this pin can be configured as
GPIO16 or MPGIO9.
SATA5GP /
GPIO49 /
TEMP_ALERT#
I
Serial ATA 5 General Purpose: Same function as SATA0GP,
except for SATA Port 5.
If interlock switches are not required, this pin can be configured as
GPIO49 or TEMP_ALERT#.
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. The SClock frequency supported is
32 kHz.
If SGPIO interface is not used, this signal can be used as GPIO22.
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 GPIO38.
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.
SATA3RBIAS I/O
SATA3 RBIAS: Analog connection point for a 750 ±1% external
precision resistor.
SATA3COMPI I
Impedance Compensation Input: Connected to a 50 (1%)
precision external pull-up resistor to VccIO.
SATA3RCOMPO O
Impedance/Current Compensation Output: Connected to a
50 (1%) precision external pull-up resistor to VccIO
Table 2-4. Serial ATA Interface Signals (Sheet 3 of 3)
Name Type Description
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