Signal
Name
I/O
Type
Default
Mode
Ball
Coun
t
Default
Direction
and Logic
State
Power
Well
Internal/
External
Resistor Pull-
Up/Down
Description
3. OC#[3:0] can only be used for EHCI
controller #1
GPIO43
2
I/O
Native
1
I
SUS
General Purpose I/O Port 43. Not
Multiplexed
3
GPIO44
I/O
Native
1
I
SUS
General Purpose I/O Port 44. Not
Multiplexed
3
GPIO45
I/O
Native
1
I
SUS
General Purpose I/O Port 45. Not
Multiplexed
3
GPIO46
I/O
Native
1
I
SUS
General Purpose I/O Port 46. Not
Multiplexed
3
GPIO47
I/O
Native
1
I
SUS
General Purpose I/O Port 47. Not
Multiplexed
3
SDATAOU
T1/
GPIO48
I/O
GPI
1
I
CORE
SATA Serial GPIO Data Out 1. Driven by
the controller to indicate the drive status
in the following sequence: drive 4,
5...4,5...
If SDATAOUT1 interface is not used, this
signal can be used as a GPIO Port 48.
SATA5_GP
/
TEMP_ALE
RT#/
GPIO49
I/O
GPI
1
I
CORE
Serial ATA 5 General Purpose. This is an
input pin which can be configured as an
interlock switch corresponding to SATA
Port 5. When used as an interlock switch
status indication, this signal should be
drive to ‘0’ to indicate that the switch is
closed and to ‘1’ to indicate that the
switch is open.
Temperature Alert. Used as an alert
(active low) to indicate to the external
controller (such as, EC or SIO) that
temperatures are out of range for the
PCH or Memory Controller or the
processor core.
If interlock switches or Temp Alert are
not required, this pin can be configured
as GPIO Port 49.
GPIO50
2
I/O
Native
1
I
CORE
General Purpose I/O Port 50. Not
Multiplexed
3
BBS1/
GPIO51
I/O
BBS1
1
O (High)
CORE
Weak internal
pull-up
BIOS Boot Strap 1.
BBS1
BBS0
0
0
Not valid
0
1
Not valid
1
0
Not valid
1
1
SPI boot
If BBS1 interface is not used, the signals
can be used as GPIO Port 51.
3
GPIO52
2
I/O
Native
1
I
CORE
General Purpose I/O Port 52. Not
Multiplexed.
continued...
Technical Reference—Crystal Forest
Intel
®
Xeon
®
Processor E3-1125C with Intel
®
Communications Chipset 8910 Development Kit
October 2012
User Guide
Order No.: 328009-001US
49