5 backlight, Ktt20/pitx user's guide, 1 power connector backlight pins – Kontron KTT20-pITX User Manual
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KTD-S0044-G Page
16
Graphics Processing Unit
KTT20/pITX User's Guide
7.5
Backlight
Backlight is available through the connector J1700. The backlight voltage can be supplied from the on-
board +5V voltage if you set one or two short circuit jumper on connector J401. For backlight voltages
differing from +5V use pin 9 and/or 11 on connector J401 to supply the backlight (pins 7 and 8 represent
the associated ground, identical with board ground).
7.5.1
Power Connector Backlight Pins
The following table is an extract of the J401 connector overview. For further details about pin 1 see chapter
'Default Power Configuration'.
Pin
Signal
Description
Type
9
VDD
1)
External backlight voltage input
PWR IN
10
VCC5
1)
Onboard power +5V
PWR
11
VDD
1)
External backlight voltage input
PWR IN
12
VCC5
1)
Onboard power +5V
PWR
7
GND
Backlight ground
PWR
8
GND
Backlight ground
PWR
19
1
2
20
Onboard +5V
backlight voltage
System
Backlight
(with short
circuit jumper)
19
20
2
1
GND
External Backlight
Power Supply
+
--
OR
Backlight Voltage
Top view
CAUTION!
If you use an external backlight power supply do not forget the three
System links (pin 13 to 18) otherwise the board does not start.