Unused eSDHC Interface Pin Recommendations in P1022 Processor

[prasantahalder]

It is specified in P1022 design checklist that if eSDHC interface is not used SDHC_DAT0/GPIO1_[25], SDHC_DAT[1:2], SDHC_DAT3 should be configured as GPIO Output, leave floating. But SDHC_DAT[1:2] pins cannot be configured as GPIO output. What should be recommendation for unused SDHC_DAT[1:2] pins?

[Pavel]

If pins are configured as SDHC, tie to inactive state through 10–100kpull-up resistors.

It is common practice. To ensure reliable operation, it is highly recommended to connect unused inputs to an appropriate signal level.

Have a great day,
Pavel

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