Datasheet

77
32072H–AVR32–10/2012
AT32UC3A3
7.6.19 Reset Cause Register
Name: RCAUSE
Access Type: Read-only
Offset: 0x140
Reset Value: 0x00000000
• BOD33: Brown-out 3V3 Reset
The CPU was reset due to the supply voltage 3V3 being lower than the brown-out threshold level.
• OCDRST: OCD Reset
The CPU was reset because the RES strobe in the OCD Development Control register has been written to one.
• CPUERR: CPU Error
The CPU was reset because it had detected an illegal access.
• JTAG: JTAG reset
The CPU was reset by setting the bit RC_CPU in the JTAG reset register.
• WDT: Watchdog Reset
The CPU was reset because of a watchdog timeout.
• EXT: External Reset Pin
The CPU was reset due to the RESET pin being asserted.
• BOD: Brown-out Reset
The CPU was reset due to the supply voltage 1V8 being lower than the brown-out threshold level.
• POR Power-on Reset
The CPU was reset due to the supply voltage being lower than the power-on threshold level.
31 30 29 28 27 26 25 24
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23 22 21 20 19 18 17 16
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15 14 13 12 11 10 9 8
-----BOD33-OCDRST
76543210
CPUERR - - JTAG WDT EXT BOD POR