SBC-C41-pITX
SBC-C41-pITX User Manual - Rev. First Edition: 1.0 - Last Edition: 1.1 - Author: A.R./S.B. - Reviewed by M.B. Copyright © 2021 SECO S.p.A.
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3.3.4
Buttons / LED Header
To allow the integration of the SBC-C41 board 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 CN12 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_RUN 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_ALW electrical level with 10k
Ω
pull-up.
PWR_SW_P: Power button input signal, +3.3V_ALW electrical level with 10k
Ω
pull-up. This signal has to 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.
PWR_SW_N: Power button GND
FP PWR_P/SLP_N: Power/Sleep messaging LED terminal 1, +5V_ALW 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, +5V_ALW voltage. Connect it to the
other extremity of the dual-color power LED above mentioned.
Buttons / LED Header CN12
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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