Datasheet

72
32072H–AVR32–10/2012
AT32UC3A3
7.6.14 RC Oscillator Calibration Register
Name: RCCR
Access Type: Read/Write
Offset: 0xC0
Reset Value: 0x00000000
• 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.
• FCD: Flash Calibration Done
Set to 1 when CTRL, HYST, and LEVEL fields have been updated by the Flash fuses after power-on reset, or after Flash fuses
are reprogrammed. The CTRL, HYST and LEVEL values will not be updated again by the Flash fuses until a new power-on
reset or the FCD field is written to zero.
• CALIB: Calibration Value
Calibration Value for the RC oscillator.
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
------ CALIB
76543210
CALIB