Compaq SmartCore Express SMA200 - Manual (Page 27)

DIGITAL-LOGIC AG SMA200 Manual V1.0
27
5.4.3. LVDS
Signal BUS Type Description
On Module
Termination Ext. Ter-
mination
Needed Max.
Length
in mm
Ohm
Matched
Length in
mm
LVDS_DDCCLK LVDS 3.3V DDC signal PU 10k to
3.3V - 150 55
LVDS_DDCDAT LVDS 3.3V DDC signal PU 10k to
3.3V - 150 55
LVDS_DATA[0..3] +/- LVDS Dif
Out
LVDS data signal
Connected directly to the
display. - - 150 100 0.5
LVDS_CLK +/- LVDS Dif
Out
LVDS clock signal
Connected directly to the
display. - - 150 100 0.5
LVDS_VDDEN LVDS 3.3V
Out
LVDS control signal
To switch on/off the VDD
of the LVDS display. 100k pull
down - 150 55
LVDS_BKLCTL LVDS 3.3V
Out
Connected to the LVDS
display’s PWM-based
backlight inverter
module. No multi-bus
master mode is
supported. - 150 55
LVDS_BKLEN LVDS 3.3V
Out
Connected to the LVDS
display’s backlight
inverter module switch. 100k pull
down - 150 55
LVDS_CTLA_CLK LVDS 3.3V
I/O
Connected to the LVDS
display’s PWM-based
backlight inverter
module. No multi bus
master mode supported. PU 4.7k to
3.3V - 150 55
LVDS_CTLB_DATA LVDS 3.3V
I/O
Connected to the LVDS
display’s PWM-based
backlight inverter
module. PU 4.7k to
3.3V - 150 55
If the signals are not used:
All these LVDS signals may be left open.
Remarks:
For the DDC signals, a voltage translator to 3.3V or 5V is needed.
Pair to Pair spacing: 35mil = 0.9mm
Pair to Pair matching: better than 25mm
Bus to Bus spacing: 20mil = 0.5mm
Maximum via count: 0 2.
EMV/EMI filters: