AT91SAM9260-EK SAM-BA Recovery

Reference documentation

You also have a brief AT91SAM9260-EK Bootstrap Recovery Procedure chapter in the AT91Bootstrap application note.

In brief

On AT91SAM9260-EK platform, there is no way to disconnect the on board DataFlash. If valid code is present in the first DataFlash page the chip will execute it before connecting to SAM-BA. FirstBoot features a recovery method :
An erase of the first DataFlash page is performed if button BP4 on the board is pressed after reset.

To erase the first dataflash page :

• Push the button BP4
• Push the reset button while BP4 is pressed
• The following message is displayed on the serial console :

INFO : Low Level Init : OK
Init Data flash
BP4 is pressed, erasing First Sector
SPI data Flash CS0 or CS1
Please reboot