at91sam9g20-cu ATMEL Corporation, at91sam9g20-cu Datasheet - Page 78

• Manufacturer Part Number: at91sam9g20-cu
• Description: At91 Arm Thumb Microcontrollers
• Manufacturer: ATMEL Corporation

6384B–ATARM–15-Dec-08
If a valid application 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.
The DataFlash boot is configured to be compatible with the future design of the DataFlash.
Figure 13-7. Serial DataFlash Download
Read the DataFlash into the internal SRAM.
Restore the reset value for the peripherals.
Set the PC to 0 and perform the REMAP
Read the first 8 instructions (32 bytes).
to jump to the downloaded application
(code size to read in vector 6)
Decode the sixth ARM vector
(except vector 6) are LDR
Send status command
or Branch instruction
Is status OK ?
8 vectors
Start
End
Yes
Yes
AT91SAM9G20 Preliminary
No
No
Jump to next boot
solution
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