Datasheet

AT32UC3A

13.6.13 Bandgap Calibration

• KEY: Register Write protection

This field must be written twice, first with key value 0x55, then 0xAA, for a write operation to have an effect.

• CALIB: Calibration value

Calibration value for Bandgap. See Electrical Characteristics for voltage values.

• FCD: Flash Calibration Done

Set to 1 when the CALIB field has been updated by the Flash fuses after power-on reset or when the Flash fuses are

reprogrammed. The CALIB field will not be updated again by the Flash fuses until a new power-on reset or the FCD field is

written to zero.

31 30 29 28 27 26 25 24

KEY

23 22 21 20 19 18 17 16

- - - - - - - FCD

15 14 13 12 11 10 9 8

- - - - - - - -

7 6 5 4 3 2 1 0

- - - - - CALIB

32058K

AVR32-01/12