ECS PMI8M, Manual, Page: 17 / 52

11
Installing the Motherboard
Hard Drive Activity LED
Connecting pins 1 and 3 to a front panel mounted LED provides visual indication
that data is being read from or written to the hard drive. For the LED to function
properly, an IDE drive should be connected to the onboard IDE interface. The LED
will also show activity for devices connected to the SCSI (hard drive activity LED)
connector.
Front Panel Header
The front panel header (PANEL) provides a standard set of switch and LED headers
commonly found on ATX or micro-ATX cases. Refer to the table below for informa-
ATX_POWER: ATX 20-pin Power Connector
1
VCC3
11
VCC3
2
VCC3
12
-12V
10
+12V
20
VCC
3
GND
13
GND
4
VCC
14
PS-ON#
5
GND
15
GND
6
VCC
16
GND
7
GND
17
GND
8
PWROK
18
-5V
9
5VSB
19
VCC
Pin Signal Name Pin Signal Name
Pin Signal Name Function
1 HD_LED_P Hard Disk LED+ 2 FP PWR/SLP *MSG LED+
3 HD_LED_N Hard disk LED-
5 RST_SW_N Reset Switch
7 RST_SW_P Reset Switch
9 RSVD_DNU Reserved
4 FP PWR/SLP *MSG LED-
6 PWR_SW_P Power Switch
8 PWR_SW_N Power Switch
10 Key No pin
* MSG LED (dual color or single color)
Pin Signal Name Function