786LCD/mITX Family
KTD-00629-K
Public User Manual
Date: 2009-10-13 Page
20 of 77
4.2 Power Connector (ATXPWR)
The 786LCD/mITX is designed to be supplied from a standard ATX power supply.
Power Connector 786LCD/mITX
Note
Pull
U/D
Ioh/Iol
Type
Signal
PIN
Signal
Type
Ioh/Iol
Pull
U/D
Note
-
-
PWR
+12V 10 20
5V
PWR
-
-
-
-
PWR
SB5V 9 19
5V
PWR
-
-
4K7
-
I
P_OK 8 18
-5V
PWR
-
-
1
-
-
PWR
GND 7 17
GND
PWR
-
-
-
-
PWR
5V 6
16
GND
PWR
-
-
-
-
PWR
GND 5 15
GND
PWR
-
-
-
-
PWR
5V 4
14 PSON#
OC
-
-
-
-
PWR
GND 3 13
GND
PWR
-
-
-
-
PWR
3V3 2
12
-12V
PWR
-
-
-
-
PWR
3V3 1
11
3V3
PWR
-
-
Note: -5V supply is not used onboard.
The requirements to the supply voltages are as follows (also refer to ATX specification):
Supply
Min
Max
Tolerance
3V3 3.14V
3.46V +/-5%
5V 4.75V
5.25V +/-5%
SB5V 4.75V
5.25V +/-5%
+12V 11.4V
12.6V +/-5%
–12V –13.2V
–10.8V +/-10%
Control signal description:
Signal
Description
P_OK
Active high signal from the power supply indicating that the 5V and 3V3 supplies are within
operating limits. It is strongly recommended to use an ATX supply with the 786LCD/mITX
boards, in order to implement the supervision of the 5V and 3V3 supplies. These supplies are
not supervised onboard the 786LCD/mITX boards.
PS_ON#
Active low open drain signal from the board to the power supply to turn on the power supply
outputs. Signal must be pulled high by the power supply.
