Table of Contents
Advertisement
Motherboard Connections
This section describes the connections on the A3SPI-4C-LN6PF/8C-LN6PF motherboard
and provides pinout definitions. Note that depending on how the system is configured, not
all connections are required. The LEDs on the motherboard are also described here. A
motherboard layout indicating component locations may be found in Chapter 1.
Please review the Safety Precautions in Appendix A before installing or removing components.
4.1 Power Connections
Main ATX Power, 4-pin HDD Power, 4-pin DC Power
The primary power supply connector (JPW1) meets the ATX SSI EPS 24-pin specification.
JPH1 is a 4-pin power connector for HDD devices. JPV1 is an 8-pin 12V DC power input for
an alternative power source when the 24-pin ATX power is not in use.
ATX Power 24-pin Connector
Pin Definitions
Pin#
Definition
Pin#
13
+3.3V
1
14
-12V
2
15
COM
3
16
PS_ON
4
17
COM
5
18
COM
6
19
COM
7
20
Res (NC)
8
21
+5V
9
22
+5V
10
23
+5V
11
24
COM
12
Chapter 4
4-pin HDD Power
Pin Definitions
Definition
Pin#
+3.3V
1
+3.3V
2-3
COM
4
+5V
COM
+5V
COM
PWR_OK
5VSB
+12V
+12V
+3.3V
31
Chapter 4 Motherboard Connections
Definition
12V
Ground
5V
+12V 8-pin Power
Pin Definitions
Pin#
Definition
1-4
Ground
5-8
+12V
Advertisement
Table of Contents
