Datasheet

289
32142D–06/2013
ATUC64/128/256L3/4U
14.6.19 Supply Monitor 33 Calibration Register
Name:
SM33
Access Type: Read/Write
Reset Value: -
• SAMPFREQ: Sampling Frequency
Selects the sampling mode frequency of the 3.3V supply monitor. In sampling mode, the SM33 performs a measurement every
2
(SAMPFREQ+5)
cycles of the internal 32kHz RC oscillator.
• ONSM: Supply Monitor On Indicator
0: The supply monitor is disabled.
1: The supply monitor is enabled.
This bit is read-only. Writing to this bit has no effect.
• SFV: Store Final Value
0: The register is read/write
1: The register is read-only, to protect against further accidental writes.
This bit is cleared after a reset.
• FCD: Flash Calibration Done
This bit is cleared after a reset.
This bit is set when CALIB field has been updated after a reset.
• CALIB: Calibration Value
Calibration Value for the SM33.
• FS: Force Sampling Mode
0: Sampling mode is enabled in DeepStop and Static mode only.
1: Sampling mode is always enabled.
• CTRL: Supply Monitor Control
31 30 29 28 27 26 25 24
---- SAMPFREQ
23 22 21 20 19 18 17 16
-----ONSMSFVFCD
15 14 13 12 11 10 9 8
---- CALIB
76543210
FS - - - CTRL