Intel 6 SERIES CHIPSET - DATASHEET 01-2011 Datasheet page 60

Table 2-4. Serial ATA Interface Signals (Sheet 3 of 3)
Name
SATA3GP /
GPIO37
SATA4GP /
GPIO16 /
SATA5GP /
GPIO49 /
TEMP_ALERT#
SATALED#
SCLOCK/
GPIO22
SLOAD/GPIO38
SDATAOUT0/
GPIO39
SDATAOUT1/
GPIO48
SATA3RBIAS
SATA3COMPI
SATA3RCOMPO
60
Type
Serial ATA 3 General Purpose: Same function as SATA0GP,
except for SATA Port 3.
I
If interlock switches are not required, this pin can be configured as
GPIO37.
Serial ATA 4 General Purpose: Same function as SATA0GP,
except for SATA Port 4.
I
If interlock switches are not required, this pin can be configured as
GPIO16 or MPGIO9.
Serial ATA 5 General Purpose: Same function as SATA0GP,
except for SATA Port 5.
I
If interlock switches are not required, this pin can be configured as
GPIO49 or TEMP_ALERT#.
Serial ATA LED: This signal is an open-drain output pin driven
during SATA command activity. It is to be connected to external
OD O 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.
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
OD O
32 kHz.
If SGPIO interface is not used, this signal can be used as GPIO22.
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
OD O
assertion.
If SGPIO interface is not used, this signal can be used as GPIO38.
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...
OD O
If SGPIO interface is not used, the signals can be used as GPIO.
SATA3 RBIAS: Analog connection point for a 750  ±1% external
I/O
precision resistor.
Impedance Compensation Input: Connected to a 50  (1%)
I
precision external pull-up resistor to VccIO.
Impedance/Current Compensation Output: Connected to a
O
50  (1%) precision external pull-up resistor to VccIO
Signal Description
Description
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