Atmel AT32UC3C0128C, Руководство пользователя

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32166A–AVR32806–06/11
Atmel AVR32806
6.3 Boot process
After reset, the boot process starts at 80000000h:
•
If the ISP_FORCE configuration bit is 1 (see
Table 6-1
), the USB DFU ISP is immediately
started
• If the ISP_FORCE configuration bit is 0:
–
If external events (power-on reset, external reset, OCD reset, JTAG reset, or JTAG
hardware reset) are among the reset causes, the boot process checks if the
ISP_IO_COND_EN configuration bit is 1, and if so, launches either the USB DFU
ISP or the application according to the ISP I/O configuration specified by the user
page Configuration Word2. If ISP_IO_COND_EN is 0, the application is launched.
– If the watchdog timer (WDT) is one of the reset causes, the boot process launches
the application. The watchdog timer is not stopped if the application was running
before reset.
– If an error (BOD or CPU error) is one of the reset causes, the boot process launches
either the USB DFU ISP or the application according to which one was running
before the reset.