i.MX RT Crossover MCUsのトピックRe: RT1050 bootROM eMMC5.1 support

RT1050 bootROM eMMC5.1 support

mateuszpiesta — Tue, 17 Jul 2018 07:16:29 GMT

The question is if bootROM will be able to boot from eMMC 5.0 - 5.1 version card ? We are designing product in which we are planning to boot from eMMC, RM says that uSDHC supports JEDEC 4.5 and as far as I know 5.0/1 versions are backward compatible with 4.5 so it should work. Could you confirm this ?

Thank you in advance

Mateusz Piesta

Re: RT1050 bootROM eMMC5.1 support

Carlos_Musich — Thu, 19 Jul 2018 20:30:23 GMT

Hi Mateusz,

there are no plans to support eMMC5.1 in i.MXRT1050. But if you want I can investigate if future releases of i.MXRT family will.

Carlos

Re: RT1050 bootROM eMMC5.1 support

mateuszpiesta — Fri, 20 Jul 2018 05:27:10 GMT

Hi Carlos,

by saying that eMMC5.1 is not supported you mean bootROM won't be able to boot from eMMC5.0/5.1 cards or it will fallback to 4.5 standard and boot properly ?

Mateusz

Re: RT1050 bootROM eMMC5.1 support

Carlos_Musich — Mon, 23 Jul 2018 16:38:37 GMT

Hi Mateusz,

The EMMC 4.5 or EMMC 5.0 /5.1 is backward-compatible with eMMC4.4, we can use it in eMMC4.4 mode to enable eMMC4.4 functionality and performance on the i.MXRT platform. Booting from an eMMC 4.5 device or higher version is not supported, boot ROM will fall back to the eMMC4.4 standard when a eMMC4.5 or higher version capable device is detected.