Datasheet

101

SAM9263 [DATASHEET]

Atmel-6249N-ATARM-SAM9263-Datasheet_14-Mar-16

Figure 12-6. Serial DataFlash Download

12.5 SD Card Boot

The SD Card Boot program searches for a valid application in the SD Card memory.

(Boot ROM does not support high capacity SDCards.)

It looks for a boot.bin file in the root directory of a FAT12/16/32 formatted SD Card. If a valid file is found, this

application is loaded into internal SRAM and executed by branching at address 0x0000_0000 after remap. This

application may be the application code or a second-level bootloader.

End

Read the first 7 instructions (28 bytes).

Decode the sixth ARM vector

Yes

Read the DataFlash into the internal SRAM.

(code size to read in vector 6)

Restore the reset value for the peripherals.

Set the PC to 0 and perform the REMAP

to jump to the downloaded application

Send status command

7 vectors

(except vector 6) are LDR

or Branch instruction

Yes

Start

Is status OK ?

Jump to next boot

solution