AD9249: FMC connector

Hi,
In the project I'm working on, a connection must be made between a zynq ZC702 (Xilinx Zynq-7000 SoC ZC702 Evaluation Kit, www.xilinx.com/.../ek-z7-zc702-g.html) and an analog devices board AD9249 (www.analog.com/.../EVAL-AD9249.html. To test the use of both boards, a connection must be made between the two boards in order to verify that the vhdl code allows the zynq to synchronize with the ad9249 and acquire data. For this purpose I wanted to understand if it is possible to make a direct connection between the two fmc connectors (male in the AD9249 and female in the ZC702) or it is necessary to use an intermediate board capable of connecting only a few pins of both connectors like: fmchub.github.io/.../FMC_LPC_BREAKOUT_datasheet.html My doubt is due to the fact that looking at the pinouts of both connectors there would seem to be pins dedicated to gnd, power supplies or others (like CLK0_M2C that I dont’t understand what is used for. Can you provide some references explaning the purpose of all the pins in the fmc connector of the ad9249?) . So connecting the two fmc to each other could short-circuit the gnd and / or other of the two boards leading to failure. I would like to understand if it is possible to connect the two fmc connectors directly by placing fpga and adc on top of each other.

At the following link you can find the schematic of the AD9249 including the pinouts of the fmc connector: wiki.analog.com/.../ad9249_fmc_brd_designfiles.zip

Here instead, on page 71, the pinouts of the ZC702 are available:
www.xilinx.com/.../ug850-zc702-eval-bd.pdf

Thanks

  • 0
    •  Analog Employees 
    on Jan 13, 2020 6:35 PM

    Hi Pietrom,

    You have linked to the AD9249 evaluation board schematic, which contains the connections to the FMC connector. You should have the information you need to determine if it is compatible with the ZC702.

    I believe the breakout board is used for probing and observing particular pins and would not be used as an interposer board to connect two different boards.

    CLK0_M2C is not used on the AD9249 so you do not need to worry about it for AD9249. Do you have any other questions about specific signals?

    The VITA standard has certain pins designated for general signal types. When using boards the conform to the standard, there should be no danger of shorting power to ground, but it is always a good idea to double-check and verify.

    Thank you.

    Doug