Datasheet

159
32133D–11/2011
UC3D
13.6.12 Voltage Regulator Calibration Register
Name: VREGCR
Access Type: Read/Write
Offset: 0x0030
Reset Value: 0x00000000
• SFV: Store Final Value
0: The register is read/write
1: The register is read-only, to protect against further accidental writes.
• FCD: Flash Calibration Done
Set to 1 when the CALIB and SLEEPCALIB fields have been updated by the Flash fuses after power-on reset or when the Flash
fuses are reprogrammed. The CALIB and SLEEPCALIB fields will not be updated again by the Flash fuses until a new power-on
reset or the FCD field is written to zero.
• SLEEPCALIB: SLEEP Calibration value
Calibration value for Voltage Regulator in Sleep Static and DeepStop modes, and also in Stop mode if the VREGCTRL.DMD is
set to 0.
• CALIB: Calibration value
Calibration value for Voltage Regulator. See Electrical Characteristics for voltage values.
Note that this register is protected by a lock. To write to this register the UNLOCK register has to be written first. Please
refer to the UNLOCK register description for details.
31 30 29 28 27 26 25 24
SFV-------
23 22 21 20 19 18 17 16
-------FCD
15 14 13 12 11 10 9 8
----- SLEEPCALIB
76543210
----- CALIB