CCOMe-C79
CCOMe-C79 - Rev. First Edition: 1.0 - Last Edition: 1.0 - Author: A.R. - Reviewed by E.S. Copyright © 2021 SECO S.p.A.
58
Front Panel Header
To allow the integration of a COM Express module based system inside a box PC-like, there
is a connector on the carrier 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 signalling 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.
Connector CN34 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 Switch GND.
RST_SW_P: Reset switch input signal SYS_RESET#. This signal can 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.
PWR_SW_P: Power switch input signal PWRBTN#. 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.
PWR_SW_N: Power Switch GND.
FP PWR_P/SLP_N: Power/Sleep messaging LED terminal 1 with 510
Ω
pull-up resistor to +5V_ALW voltage. Connect it to an extremity of a dual-colour power LED
for power ON/OF, sleep and message waiting signalling. 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 pull-up resistor to +5V_ALW voltage. Connect it to the other extremity of the dual-colour
power LED above mentioned.
Please be aware that the power switch input signal and the reset switch input signal are also managed directly on the carrier board by the two pushbuttons M2 and
M1 (respectively), so it is not mandatory to connect them externally using CN34.
Switch / LED Header Interface - CN34
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
+5V_RUN
