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3.3.8
Switch / LED header interface
Switch / LED Header Interface - CN20
Pin
Signal
Pin
1
HD_LED_P
3
HD_LED_N
5
RST_SW_N
7
RST_SW_P
9
---
utilisation of them:
HD_LED_P: Hard Disk Activity LED signal's pull-up to +5V_S voltage (510Ω 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, open drain. 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 510Ω pull-
up resistor to +5V_A 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 510Ω pull-
up resistor to +5V_A voltage. Connect it to the
power LED above mentioned.
CQ7-A42
CQ7-A42 - Rev. First Edition: 1.0 - Last Edition: 2.0 - Author: S.B. - Reviewed by G.G. Copyright © 2016 SECO S.r.l.
To allow the integration of a CQ7-A42 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
Signal
optional LED signalling activity on SATA Channel and Power On states.
2
FP PWR_P/SLP_N
Connector CN20 is an internal 9-pin standard male pin header, p 2.54 mm, 5+4 pin, h=
4
FP PWR_N/SLP_P
6mm, type NELTRON p/n 2213S-10G-E10 or equivalent.
6
PWR_SW_P
The pinout of this connector complies with Intel
Design Guide, Switch/LED Front Panel section, chapter 2.2. It is shown in the
8
PWR_SW_N
table on the left.
Here following the signals description, and also an example schematic for a possible
other extremity of the dual-colour
®
D1
CN1
1
2
HD_LED_P
551-0407F
HD_LED_N
3
4
5
6
7
8
9
2213S-10G-E10
Front Panel I/O connectivity
D2
1
2
PWR_P/SLP_N
551-3107F
PWR_N/SLP_P
M1
1
3
PWR_BTN#
4
2
Pushbutton SMD
M2
1
3
RST_BTN#
4
2
Pushbutton SMD
35
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