Datasheet

277
32117D–AVR-01/12
AT32UC3C
• BODHYST: 1.8V Brown Out Detector Hysteresis
0: The BOD18 hysteresis is disabled.
1: The BOD18 hysteresis is enabled.
• BODLEVEL: 1.8V Brown Out Detector Trigger Level
This controls the voltage trigger level for the BOD18.
When the flash fuse calibration is done (SCIF.BOD.FCD is set):
SCIF.BOD.LEVEL is loaded to 0x28 if the BODLEVEL fuses are greater than 0xA.
SCIF.BOD.LEVEL is loaded to (BODLEVEL x 4) if the BODLEVEL fuses are lower or equal to 0xA.
Refer to See ”Electrical Characteristics” on page 1248.
• UPROT, SECURE, BOOTPROT, EPFL, LOCK
These are Flash controller fuses and are described in the FLASHC section.
15.9.2 Default Fuse Value
The devices are shipped with the FGPFRLO register value: 0xF877FFFF:
• BOD33EN fuses set to 11. BOD33 is disabled.
• BODEN fuses set to 11. BOD18 is disabled.
• BODHYST fuse set to 1. The BOD18 hysteresis is enabled.
• BODLEVEL fuses set to 0000. This is the minimum voltage level for BOD18.
• UPROT fuse set to 1
• SECURE fuses set to 11
• BOOTPROT fuses set to 011. The bootloader protected size is 8 KBytes.
• EPFL fuse set to 1. External privileged fetch is not locked.
• LOCK fuses set to 1111111111111111. No region locked.
See also the AT32UC3C Bootloader user guide document.
After the JTAG or aWire chip erase command, the FGPFRLO register value is 0xFFFFFFFF.