TXB0108: Can not test the good signal.

Lian Wu

Genius 5250 points

Part Number: TXB0108

Dears:

Could you kindly help to check the below schematic:

The signal line is FPGA<--->TXB0108<--->SPI FLASH.

FPGA_E_SPI_CLK is coming from FPGA and the frequency is 1MHz.

If there is no TXB0108 the CLK is OK.

Now when we welded TXB0108 we test the FPGA_E_SPI_CLK is in disorder.

Could you kindly help to give some advice?

Thanks a lot!

Best regards

Luck Wu

over 6 years ago

0 Clemens Ladisch over 6 years ago

Guru 243820 points

What exactly do you mean with "in disorder"? Do you have an oscilloscope trace?

The TXB has very weak output drivers; are there any pull-up/-down resistors on the lines? Furthermore, the edge accelerators are designed for loads up to 70 pF; do you have long lines or connectors that could exceed this?

0 Michael J Schultis over 6 years ago in reply to Clemens Ladisch

TI__Mastermind 24485 points

Hello Lian,

Can you please provide more information about what is not working?
Do you have a scope shot to share?

Best,
Michael

0 Lian Wu over 6 years ago in reply to Michael J Schultis

Genius 5250 points

Hi Michael:
It is handled for we have some problem about FPGA 's code.
And we update the code, the single is OK.
Many thanks for your help!

Best regards
Luck Wu

0 Michael J Schultis over 6 years ago in reply to Lian Wu

TI__Mastermind 24485 points

Hello Lian,

Glad you were able to figure it out!
Please let us know how we can help in the future by continuing to post your questions here on the forums.

Best,
Michael

Logic

Logic forum

TXB0108: Can not test the good signal.