topic RT685:eMMC HS400 modes does not work in i.MX RT Crossover MCUs

RT685:eMMC HS400 modes does not work

shaozhongliangs — Fri, 17 Nov 2023 08:06:48 GMT

The eMMC with HS400 mode didn't work in customer board. There was problem on MMC_PollingCardStatusBusy for HS400, but it works for HS200. Do we have HS400 test examples for RT685? Is there any guide for this case?

Re: RT685:eMMC HS400 modes does not work

jingpan — Tue, 21 Nov 2023 02:22:53 GMT

Hi @shaozhongliangs ,

There is no EMMC demo in RT1170 SDK, but you can refer to RT500 SDK(mmccard_fatfs), this is HS400 demo example, the SDHC IP is same.

Regards,

Jing