Jumper Name
Ref
Des
Locatio
n
Color
Default
Setting
Description
SPI In Circuit
Programming Mode
J2J1
Black
Shunt [1-2]
Open: SPI Programming Mode
Closed: Normal Operation
SPI CS0_PU Enable
(SPI_PROG_CS0_N)
J3K1
EMPTY
Open
Open: CS0 PU Disable
Closed: CS0 PU Enabled
SPI CS1_PU Enable
(SPI_PROG_CS01_N)
J2K1
EMPTY
Open
Open: CS1 PU Disable
Closed: CS1 PU Enabled
SPI0 Flash Write Protect
J3J3
Black
Open
Open: Allow Writes
Closed: Write Protect SPI0
SPI1 Flash Write Protect
J3J4
Black
Open
Open: Allow Writes
Closed: Write Protect SPI1
Main Power Mode
J4K1
Black
Shunt [1-2]
Shunt [3-4]
4-pin header 5V power supply voltage
select
Shunt 1-2/3-4: VCC5_PS_STBY
Open: VCC5_PS
PS_ON Override
J5F1
Black
Shunt [1-2]
Open: Main Off/Stby only
Shunt 1-2: Normal operation
Shunt 2-3: Main power operation
Open: MAIN OFF/ STBY Only
BRD ID EEPROM Write
Protect (FRUID_WR)
J1A4
Black
Shunt [1-2]
Open: Write Enable
Closed: Write protected
GbE EEPROM Write
Protect
J1E1
Black
Shunt [1-2]
Shunt 1-2: Write Protected
Open: Allow writes
CPU System Agent
Voltage Selection
(VTT_SA_CPU0)
J6K1
Black
Shunt [2-3]
Shunt 1-2: VID0 forced high (VOUT = 0.5
(1 + RFS/ROFS))
Shunt 2-3: VID0 forced low (VOUT = 0.55
(1 + RFS/ROFS))
CPU System Agent Vsref
Selection
J6K2
Black
Shunt [2-3]
Shunt 1-2: VTT_SA VID0 pin pulled high
(SNB)
Shunt 2-3: VTT_SA VID0 pin pulled high
(IVB)
DMI Voltage
CPU_SNB_IVB_N
J8K4
Black
Shunt [2-3]
Shunt 1-2: 1.0V (Ivy Bridge processor)
Shunt 2-3: 1.05V (2nd Generation Intel
®
Core™ Mobile Processor)
Table 20.
Reserved Headers
Ref Des
Colour
Default Setting
1
J1F8
Blue
Open
J1G2
Red
Open
J1G3
Red
Open
J1G5
Blue
Open
J1G6
Red
Open
J2H1
Black
Open
J3E1
Black
Open
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
39