Texas Instruments Evaluation Kit for FPD-Link Family of Serializer and Deserializer LVDS Devices FLINK3V8BT-85/NOPB FLINK3V8BT-85/NOPB 데이터 시트

FPD-Link Evaluation Kit User’s Manual 

 

National Semiconductor Corporation 

 

Rev 3.0 
Date: 9/25/2007 
Page 21 of 25 

 

If the demo boards are not performing properly, use the following as a guide for 
quick solutions to potential problems.   
 
QUICK CHECKS: 
1.  Check that Power and Ground are connected to both Tx AND Rx boards. 
2.  Check the supply voltage (typical 3.3V) and also current draw with both Tx and 

Rx boards (should be about 200mA with clock and one data bit at 66MHz). 

3.  Verify input clock and input data signals meet requirements (VIL, VIH, tset, 

thold), Also verify that data is strobed on the selected rising/falling (R_FB pin) 
edge of the clock. 

4.  Check that the Jumpers are set correctly. 
5.  Check that the cable is properly connected. 
 
TROUBLESHOOTING CHART 
Problem… 

  Solution… 

There is only the output clock.  
There is no output data. 

 
 

 

 

Make sure the data is applied to the correct input pin. 
 
Make sure data is valid at the input. 

No output data and clock. 

  Make sure Power is on.  Input data and clock are 

active and connected correctly. 
 

 

  Make sure that the cable is secured to both demo 

boards. 

Power, ground, input data and 
input clock are connected 
correctly, but no outputs. 

  Check the Power Down pins of both boards and 

make sure that the devices are enabled (/PD=Vcc) for 
operation. 

The devices are pulling more 
than 1A of current. 

  Check for shorts in the cables connecting the TX and 

RX boards. 

After powering up the demo 
boards, the power supply 
reads less than 3V when it is 
set to 3.3V. 

  Use a larger power supply that will provide enough 

current for the demo boards, a 500mA power supply 
is recommended.