Adc Calibration Factors (Adcx_Calfact, X=1 - STMicroelectronics RM0365 Reference Manual

Analog-to-digital converters (ADC)
Bits 31:19 Reserved, must be kept at reset value.
Bits 18:16 DIFSEL[18:16]: Differential mode for channels 18 to 16.
These bits are read only. These channels are forced to single-ended input mode (either connected to a
single-ended I/O port or to an internal channel).
Bits 15:1 DIFSEL[15:1]: Differential mode for channels 15 to 1
These bits are set and cleared by software. They allow to select if a channel is configured as single
ended or differential mode.
DIFSEL[i] = 0: ADC analog input channel-i is configured in single ended mode
DIFSEL[i] = 1: ADC analog input channel-i is configured in differential mode
Note: Software is allowed to write these bits only when the ADC is disabled (ADCAL=0,
JADSTART=0, JADSTP=0, ADSTART=0, ADSTP=0, ADDIS=0 and ADEN=0).
Note: It is mandatory to keep cleared ADC1_DIFSEL[15] (connected to an internal single ended
channel)
Bit 0 Reserved, must be kept at reset value.
15.5.21

ADC Calibration Factors (ADCx_CALFACT, x=1

Address offset: 0xB4
Reset value: 0x0000 0000
31 30 29
Res. Res. Res. Res.
15 14 13
Res. Res. Res. Res.
Bits 31:23 Reserved, must be kept at reset value.
Bits 22:16 CALFACT_D[6:0]: Calibration Factors in differential mode
These bits are written by hardware or by software.
Once a differential inputs calibration is complete, they are updated by hardware with the calibration
factors.
Software can write these bits with a new calibration factor. If the new calibration factor is different
from the current one stored into the analog ADC, it will then be applied once a new differential
calibration is launched.
Note: Software is allowed to write these bits only when ADEN=1, ADSTART=0 and JADSTART=0
(ADC is enabled and no calibration is ongoing and no conversion is ongoing).
Bits 15:7 Reserved, must be kept at reset value.
Bits 6:0 CALFACT_S[6:0]: Calibration Factors In Single-Ended mode
These bits are written by hardware or by software.
Once a single-ended inputs calibration is complete, they are updated by hardware with the
calibration factors.
Software can write these bits with a new calibration factor. If the new calibration factor is different
from the current one stored into the analog ADC, it will then be applied once a new single-ended
calibration is launched.
Note: Software is allowed to write these bits only when ADEN=1, ADSTART=0 and JADSTART=0
(ADC is enabled and no calibration is ongoing and no conversion is ongoing).
383/1080
28 27 26 25
Res. Res. Res.
12 11 10 9
Res. Res. Res.
24 23 22
Res. Res.
rw
8 7 6
Res. Res.
rw
DocID025202 Rev 7
2)
..
21 20 19 18
CALFACT_D[6:0]
rw rw rw rw
5 4 3 2
CALFACT_S[6:0]
rw rw rw rw
RM0365
17 16
rw rw
1 0
rw rw