User Manual

Technical Reference
33
16 3.3V (4A total for pins 74, 72, 70, 18, 16, 14, 12, 4, 2 (0.5A per pin)) 17 PERn2
14 3.3V (4A total for pins 74, 72, 70, 18, 16, 14, 12, 4, 2 (0.5A per pin)) 15 GND
12 3.3V (4A total for pins 74, 72, 70, 18, 16, 14, 12, 4, 2 (0.5A per pin)) 13 PETp3
10 DAS/DSS# (I/O)/LED1# (I)(0/3.3V) 11 PETn3
8 N/C 9 GND
6 N/C 7 PERp3
4 3.3V (4A total for pins 74, 72, 70, 18, 16, 14, 12, 4, 2 (0.5A per pin)) 5 PERn3
2 3.3V (4A total for pins 74, 72, 70, 18, 16, 14, 12, 4, 2 (0.5A per pin)) 3 GND
1 GND
5.1.1.1 Front Panel Header (2.0 mm Pitch)
This section describes the functions of the front panel header. Table 14 lists the signal
names of the front panel header. Front Panel Header (2.0 mm Pitch) is a connection
diagram for the front panel header.
Table 14. Front Panel Header (2.0 mm Pitch)
Pin
Signal Name
Description
Pin
Signal Name
Description
1
HDD_POWER_LED
Pull-up 750Ω to +5V
2
POWER_LED_MAIN
[Out] Front panel LED (main
color) Pull-up 300Ω to +5V
3 HDD_LED# [Out] HDD activity LED 4 POWER_LED_ALT [Out] Front panel LED (alt
color)
5
GROUND
Ground
6
POWER_SWITCH#
[In] Power switch
7 RESET_SWITCH# [In] Reset switch 8 GROUND Ground
9
+5V_DC (1A) (Vcc)
Power
10
Key
No pin
5.1.1.1.1 Hard Drive Activity LED Header
Pins 1 and 3 can be connected to an LED to provide a visual indicator that data is being
read from or written to a hard drive. Proper LED function requires a SATA hard drive or
optical drive connected to an onboard SATA connector.
5.1.1.1.2 Reset Switch Header
Pins 5 and 7 can be connected to a momentary single pole, single throw (SPST) type
switch that is normally open. When the switch is closed, the board resets and runs the
POST.
5.1.1.1.3 Power/Sleep LED Header
Pins 2 and 4 can be connected to a one- or two-color LED. Table 15 and Table 16 show
the possible LED states.
Table 15. States for a One-Color Power LED
LED State
Description
Off Power off
Blinking
Standby
Steady
Normal operation