Kontron KTHM76-mITX - Manual (Page 41)

KTQM77 – KTHM76 Users Guide
KTD-N0850-F Page 41
6.4.2 LVDS Flat Panel Connector (LVDS) (J20)
The LVDS connector is based on 40 pole connector type Don Connex C44-40BSB1-G.
Note Type Signal PIN Signal Type Note
Max. 0.5A PWR +12V 1 2 +12V PWR Max. 0.5A
Max. 0.5A PWR +12V 3 4 +12V PWR Max. 0.5A
Max. 0.5A PWR +12V 5 6 GND PWR Max. 0.5A
Max. 0.5A PWR +5V 7 8 GND PWR Max. 0.5A
Max. 0.5A PWR LCDVCC 9 10 LCDVCC PWR Max. 0.5A
2K2Ω, 3.3V OT DDC CLK 11 12 DDC DATA OT 2K2Ω, 3.3V
3.3V level OT BKLTCTL 13 14 VDD ENABLE OT 3.3V level
3.3V level OT BKLTEN# 15 16 GND PWR Max. 0.5A
LVDS LVDS A0- 17 18 LVDS A0+ LVDS
LVDS LVDS A1- 19 20 LVDS A1+ LVDS
LVDS LVDS A2- 21 22 LVDS A2+ LVDS
LVDS LVDS ACLK- 23 24 LVDS ACLK+ LVDS
LVDS LVDS A3- 25 26 LVDS A3+ LVDS
Max. 0.5A PWR GND 27 28 GND PWR Max. 0.5A
LVDS LVDS B0- 29 30 LVDS B0+ LVDS
LVDS LVDS B1- 31 32 LVDS B1+ LVDS
LVDS LVDS B2- 33 34 LVDS B2+ LVDS
LVDS LVDS BCLK- 35 36 LVDS BCLK+ LVDS
LVDS LVDS B3- 37 38 LVDS B3+ LVDS
Max. 0.5A PWR GND 39 40 GND PWR Max. 0.5A
Note: The KTQM77 on-board LVDS connector supports single and dual channel, 18/24bit SPWG
panels up to the resolution 1600x1200 or 1920x1080 and with limited frame rate some
1920x1200.
Signal Description – LVDS Flat Panel Connector:
Signal Description
LVDS A0..A3 LVDS A Channel data
LVDS ACLK LVDS A Channel clock
LVDS B0..B3 LVDS B Channel data
LVDS BCLK LVDS B Channel clock
BKLTCTL Backlight control (1), PWM signal to implement voltage in the range 0-3.3V
BKLTEN# Backlight Enable signal (active low) (2)
VDD ENABLE Output Display Enable.
LCDVCC
VCC supply to the display. Power-on/off sequencing depending on selected (in BIOS
setup) display type. 5V or 3.3V selected in BIOS setup. LCDVCC is shared with eDP
connector. Maximum load is 1A at both voltages.
DDC CLK DDC Channel Clock
Notes: Windows API will be available to operate the BKLTCTL signal. Some Inverters have a limited
voltage range 0- 2.5V for this signal: If voltage is > 2.5V the Inverter might latch up. Some
Inverters generates noise on the BKLTCTL signal, resulting in making the LVDS transmission
failing (corrupted picture on the display). By adding a 1Kohm resistor in series with this signal,
mounted in the Inverter end of the cable kit, the noise is limited and the picture is stable.
If the Backlight Enable is required to be active high then, check the following BIOS Chipset
setting: Backlight Signal Inversion = Enabled.
Internal Connectors