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Registered: ‎09-16-2019

Bi directional communication on FMC 105 Debug Card?

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Hello, 

I'm trying to test a flash memory IC and I'm connecting to it using some pins on the FMC 105 debug card. The memory device uses bi-directional pins for communication. Can I do this on the FMC105 card or is there something about it that stops me from doing bi-directional signaling? 

 

Thank you, 

 

David H 

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Registered: ‎01-22-2015

Re: Bi directional communication on FMC 105 Debug Card?

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Hi David,

The image below of the FMC 105 board is from UG537.   This board is essentially a breakout from the FMC connector, (1), to the many other connectors on the board.  The board also has a clock generator, U2, and IIC EEPROM, (15), and a bunch of LEDs.

So, as far as the board is concerned, many of the connections are just wires and are therefore bidirectional.

FMC105_board.jpg

Also, on many of the Xilinx boards, there is a direct connection from the FPGA to the FMC connector.  This means that the FPGA-to-FMC connections are also often bidirectional.  However, this direct-connect to the FPGA makes it easy to damage the FPGA - so, caution and good ESD practice is needed.

Cheers,
Mark

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Registered: ‎01-22-2015

Re: Bi directional communication on FMC 105 Debug Card?

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Hi David,

The image below of the FMC 105 board is from UG537.   This board is essentially a breakout from the FMC connector, (1), to the many other connectors on the board.  The board also has a clock generator, U2, and IIC EEPROM, (15), and a bunch of LEDs.

So, as far as the board is concerned, many of the connections are just wires and are therefore bidirectional.

FMC105_board.jpg

Also, on many of the Xilinx boards, there is a direct connection from the FPGA to the FMC connector.  This means that the FPGA-to-FMC connections are also often bidirectional.  However, this direct-connect to the FPGA makes it easy to damage the FPGA - so, caution and good ESD practice is needed.

Cheers,
Mark

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Registered: ‎09-16-2019

Re: Bi directional communication on FMC 105 Debug Card?

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Thank you for the confirmation. 

 

-David 

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