AT572D940HF_14 Datasheet, PDF (86/745 Pages) ATMEL Corporation – High Performance MagicV VLIW DSP

Figure 9-6. Serial DataFlash Download
Start
Send status command
Is status OK ?
No
Yes
Read the first 7 instructions (32 bytes).
Decode the sixth ARM vector
Jump to next boot
solution
7 vectors
(except vector 6) are LDR
No
or Branch instruction
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
End
9.6 SAM-BA Boot
If no valid DataFlash device has been found during the DataFlash boot sequence, the SAM-BA
boot program is performed.
The SAM-BA boot principle is to:
– Check if the USB Device enumeration has occured.
– Check if the characters have been received on the DBGU.
86 AT572D940HF Preliminary
7010A–DSP–07/08