Kontron KTAM3874-pITX - Manual (Page 41)

KTD-S0051-D Page 37 Power Supply
KTAM3874/pITX User's Guide
15.4 Power Front Panel Header
The power button and other power signals are available through the pin header J2102 (10 pins).
Header Pin Signal Description Type
1 RST_BTN+ Reset button (positive) I-33
2 PWR_BTN+ Power button (positive) I-33
3 RST_BTN- Reset button (negative) = GND PWR
4 PWR_BTN- Power button (negative) = GND PWR
5 POWER_LED1- Power LED1 (negative) = GND ---
6 POWER_LED2- Power LED2 (negative) = GND ---
7 POWER_LED1+ Power LED1 (positive) PWR
8 POWER_LED2+ Power LED2 (positive) PWR
9 GND Ground PWR
1 2
9 10
10 GND Ground PWR
CAUTION!
If you apply a discrete logic circuit instead the standard buttons to control the
reset respectively power button inputs then you should use open drain outputs
without a resistor for the RESET and with a pullup resistor for the POWER button.
15.4.1 Power LEDs
The following picture illustrates the onboard wiring.
+3.3V
220R
C
o
nn
e
c
to
r
+
-
Power LED -
Power LED +