A.9
Power Supply Connectors
The power supply connectors conform to the SSI EPS12V specification.
Table 24.
24-pin Main Power Connector Pins (Top-View)
Signal Name
Pin
Pi
n
Signal Name
+3.3 V
13
1
+3.3 V
-12 V
14
2
+3.3 V
GND
15
3
GND
PS_ON
16
4
+5 V
GND
17
5
GND
GND
18
6
+5 V
GND
19
7
GND
RSVD
20
8
PWR_OK
+5 V
21
9
+5 V Standby (5VSB)
+5 V
22
10
+12 V (+12V2)
+5 V
23
11
+12 V (+12V2)
GND
24
12
+3.3 V
Table 25.
8-pin Processor Power Connector Pins (Top-View)
Signal Name
Pin
Pin
Signal Name
+12 V (+12V1)
5
1
GND
+12 V (+12V1)
6
2
GND
+12 V (+12V1)
7
3
GND
+12 V (+12V1)
8
4
GND
Table 26.
4-pin DDR Power Connector Pins (Top-View)
Signal Name
Pin
Pin
Signal Name
+12 V (+12V1)
3
1
GND
+12 V (+12V1)
4
2
GND
A.10
Front Panel Connector
Table 27.
9-pin Front Panel Connector Pins (Top-View)
Description
Signal Name
Pi
n
Pi
n
Signal Name
Description
PU resistor (5V) for
hard drive LED
FP_VCC_HDLED
1
2
FP_LED_GRN_N
ATX power on indicator LED
Hard drive LED driver
output
FP_HD_LED_N
3
4
FP_LED_YLW_N
User defined LED driver
output (GP27)
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
43
