Texas Instruments LV32EVK01 Evaluation Kit LV32EVK01/NOPB LV32EVK01/NOPB Datenbogen
Produktcode
LV32EVK01/NOPB
DS92LV3241/3242 Evaluation Kit Users Manual Version 1.0
Troubleshooting
If the demo boards are not performing properly, use the following as a guide for quick
solutions to potential problems. If the problem persists, please contact the local Sales
Representative for assistance.
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. The Serializer board should draw about 150-200 mA with clock and all data
bits switching at 85 MHz in Quad Mode, (R
bits switching at 85 MHz in Quad Mode, (R
PRE
=12 k
Ω). The Deserializer board
should draw about 240-265mA with clock and all data bits switching at 85 MHz in
Quad Mode (8pF RxOUT loading).
Quad Mode (8pF RxOUT loading).
3. Verify input clock and input data signals meet requirements for V
IL
min, V
IL
max,
V
IH
min, V
IH
max, t
STC
, t
HTC
), also verify that data is strobed on the selected
rising/falling (RFB pin) edge of the clock.
4. Check that the Jumpers and Switches are set correctly.
5. Check that the cable is properly connected.
TROUBLESHOOTING CHART
Problem…
5. Check that the cable is properly connected.
TROUBLESHOOTING CHART
Problem…
Solution…
There is only the output clock.
There is no output data.
There is no output data.
Make sure the data is applied to the correct input pin.
Make sure data is valid at the input.
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.
input clock are connected
correctly, but no outputs.
Check the Power Down pins of both Serializer and
Deserializer boards to make sure that the devices are
enabled (/PWDB=V
enabled (/PWDB=V
DD
) for operation. Also check
DEN on the Serializer board and REN on the
Deserializer board is set HIGH.
Deserializer board is set HIGH.
The devices are pulling more
than 1A of current.
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.
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 minimum
power supply is recommended.
power supply is recommended.
National Semiconductor Corporation
Date: 9/28/2009
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