I studying the Atmel's ATSAME70Q19 Datasheet and i'm a little confused about boot operation mode from HSMCI.
In Page 892, "38.11 HSMCI Boot Operation Mode" there's a reference which says:
In boot operation mode, the processor can read boot data from the slave (MMC device) by keeping the CMD line low after power-on before issuing CMD1. The data can be read from either the boot area or user area, depending on register setting.
- What is the "boot data"? Binary file? Hex File? or something else?
- Where is "boot area" and "user area" on microSD card?
I realize that it need to store a binary file into the microSD card but how? In formated card (e.g. FAT) or like a raw data?