Datasheet

36
AT32UC3A
11. Fuses Settings
The flash block contains a number of general purpose fuses. Some of these fuses have defined
meanings outside the flash controller and are described in this section.
The general purpose fuses are erase by a JTAG chip erase.
11.1 Flash General Purpose Fuse Register (FGPFRLO)
BODEN: Brown Out Detector Enable
BODHYST: Brown Out Detector Hysteresis
BODLEVEL: Brown Out Detector Trigger Level
This controls the voltage trigger level for the Brown out detector. Refer to sectionTable 38-6 on
page 765 for values description. If the BODLEVEL is set higher than VDDCORE and enabled by
fuses, the part will be in constant reset. To recover from this situation, apply an external voltage
on VDDCORE that is higher than the BOD level and disable the BOD.
Table 11-1. FGPFR Register Description
31 30 29 28 27 26 25 24
GPF31 GPF30 GPF29 BODEN BODHYST BODLEVEL[5:4]
23 22 21 20 19 18 17 16
BODLEVEL[3:0] BOOTPROT EPFL
15 14 13 12 11 10 9 8
LOCK[15:8]
7 6 5 4 3 2 1 0
LOCK[7:0]
Table 11-2. BODEN Field Description
BODEN Description
0x0 BOD disabled
0x1 BOD enabled, BOD reset enabled
0x2 BOD enabled, BOD reset disabled
0x3 BOD disabled
Table 11-3. BODEN Field Description
BODHYST
Description
0b
The Brown out detector hysteresis is disabled
1b he Brown out detector hysteresis is enabled.
32058K
AVR32-01/12