X86
UDOO X86 User Manual - Rev. First Edition: 1.0 - Last Edition: 1.0 - Author: S.B. - Reviewed by M.B. Copyright © 2017 SECO S.r.l.
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3.3.6
Buttons / LED header
To allow the integration of a UDOO x86 based system inside a box PC-like, there is a
connector on the board that allows to remote signals for the Power Button (to be used to put
the system in a Soft Off State, or awake from it), for the Reset Button, and the signal for
optional LED signaling activity on SATA Channel and Power On states.
The pinout of this connector complies with Intel
®
Front Panel I/O connectivity
Design Guide, Switch/LED Front Panel section, chapter 2.2. It is shown in the
table on the left.
Connector CN25 is an internal 9-pin standard male pin header, p 2.54 mm, 5+4 pin, h=
6mm, type NELTRON p/n 2213S-10G-E10 or equivalent.
Signals Description
HD_LED_P: Hard Disk Activity LED signal
’
s pull-up to +5V_S voltage (510
Ω
pull-up).
HD_LED_N: Hard Disk Activity LED output signal
RST_SW_N: Reset Button GND
RST_SW_P: Reset button input signal. This signal has to be connected to an external momentary pushbutton (contacts normally open). When the pushbutton is
pressed, the pulse of Reset signal will cause the reset of the board. +3.3V_A electrical level with 10k
Ω
pull-up.
PWR_SW_P: Power button input signal, +3.3V_A electrical level with 10k
Ω
pull-up. This signal can be connected to an external momentary pushbutton (contacts
normally open). Upon the pressure of this pushbutton, the pulse of this signal will let the switched voltage rails turn on or off. Please be aware that this signal is also
driven by the momentary pushbutton located on-board, near the Consumer Infrared receiver.
PWR_SW_N: Power button GND
FP PWR_P/SLP_N: Power/Sleep messaging LED terminal 1 with 510
Ω
pull-up resistor to +5V_A voltage. Connect it to an extremity of a dual-color power LED for
power ON/OF, sleep and message waiting signaling. Please refer to Intel
®
Front Panel I/O connectivity Design Guide, chapter 2.2.4, for LED functionalities and
signal meaning.
FP PWR_N/SLP_P: Power/Sleep messaging LED terminal 2 with 510
Ω
pull-up resistor to +5V_A voltage. Connect it to the other extremity of the dual-color power
LED above mentioned.
Buttons / LED Header - CN25
Pin Signal
Pin Signal
1
HD_LED_P
2
FP PWR_P/SLP_N
3
HD_LED_N
4
FP PWR_N/SLP_P
5
RST_SW_N
6
PWR_SW_P
7
RST_SW_P
8
PWR_SW_N
9
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