SBC-992-pITX
SBC-992-pITX User Manual - Rev. First Edition: 1.0 - Last Edition: 2.0 - Author: S.B. - Reviewed by G.G Copyright © 2016 SECO S.r.l.
33
3.3.7
Switch / LED header interface
To allow the integration of a SBC-992-pITX 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 CN4 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.
As already written in the previous paragraph dedicated to Audio interface, it is possible to buy
SECO
’
s dedicated front panel module, which offers standard connections: two standard audio jacks, two pushbuttons (for reset and power on) and two LEDs, for
SATA activity and Power status signaling.
This adapter module is also contained inside the dedicated cable kit (CABKIT992) for SBC-992-pITX board. Please also check chapter 5.2.1for further details.
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 Switch GND
RST_SW_P: Reset switch 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.
PWR_SW_P: Power switch input signal, +3.3V_A 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 Switch 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.
Switch / LED Header Interface - CN4
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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