Xilinx ZC702 and ZC706 boards do not compensate for channel skew in the Maxim MAX13035E level translator resulting in possible violation of the 2.0ns input hold time as defined in the SDIO specification.
This can lead to a CRC error during write to an SD card that requires the maximum hold time.
This issue has been observed only with Swissbit SD cards.
On some ZC702 and ZC706 boards, the data hold time measured near J30 (SD connector) has been observed to be 1.8 ns which is marginal to the value mentioned in the SDIO specification and might cause data CRC errors while attempting to write to SD device.
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