Using SD Card for booting the MIMXRT1024CAG4B

[sowmiya_a]

Hi,

We are planning to use SD Card for booting the MIMXRT1024CAG4B. Based on the reference manual IMXRT1024RM chapter9.6.6.3, we are assuming that boot operation does not support SDR50 and SDR104. Hope the SD cards with SDR50 and SDR104 are supported for normal operation (Data transfer rate). Is my understanding correct?

[EdwinHz]

No. When booting from an SD card, the processor will execute the boot code from the internal boot ROM to perform hardware initialization, before loading the program image from the SD card.

[EdwinHz]

Hi @sowmiya_a,

Your understanding is correct. Table 9-26. "SD/MMC frequencies" on the RM shows all of the supported frequencies which include SDR50 and SDR104 for normal operation. It is only for boot operation that the neither SDR50 nor SDR104 are supported.

BR,
Edwin

[sowmiya_a]

Thanks for your assistance.

Also, I have a question about the boot up process. Does the system (MIMXRT1024CAG4B) use internal flash memory while booting with SD card?