POSOFF=B_0x0, SSAT=B_0x0, USAT=B_0x0
ADC offset register
| OFFSET | Data offset y for the channel programmed into OFFSETy_CH[4:0] bits These bits are written by software to define the offset y to be subtracted from the raw converted data when converting a channel (regular or injected). The channel to which the data offset y applies must be programmed to the OFFSETy_CH[4:0] bits. The conversion result can be read from in the ADC_DR (regular conversion) or from in the ADC_JDRyi registers (injected conversion). When OFFSETy[21:0] bitfield is reset, the offset compensation is disabled. Note: The software is allowed to write these bits only when ADSTART = 0 and JADSTART = 0 (which ensures that no conversion is ongoing). If several offsets (OFFSETy) point to the same channel, only the offset with the lowest y value is considered for the subtraction. For example, if OFFSET1_CH[4:0] = 4 and OFFSET2_CH[4:0] = 4, this is OFFSET1[25:0] that is subtracted when converting channel 4. |
| POSOFF | offset sign This bit is set and cleared by software to enable the positive offset. Note: The software is allowed to write these bits only when ADSTART = 0 and JADSTART = 0 (which ensures that no conversion is ongoing). 0 (B_0x0): Negative offset 1 (B_0x1): Positive offset |
| USAT | Unsigned saturation enable This bit is written by software to enable or disable the unsigned saturation feature. Note: The software is allowed to write this bit only when ADSTART = 0 and JADSTART = 0 (which ensures that no conversion is ongoing). 0 (B_0x0): Offset is subtracted maintaining data integrity and keeping converted data size 1 (B_0x1): Offset is subtracted and result is saturated to maintain converted data size. |
| SSAT | Signed saturation enable This bit is written by software to enable or disable the Signed saturation feature. (see OFFSETy_CH, OVSS, LSHIFT, USAT, SSAT) for details). Note: The software is allowed to write this bit only when ADSTART = 0 and JADSTART = 0 (which ensures that no conversion is ongoing). 0 (B_0x0): Offset is subtracted maintaining data integrity and extending converted data size (9-bit and 15-bit signed format). 1 (B_0x1): Offset is subtracted and result is saturated to maintain converted data size. |
| OFFSET_CH | Channel selection for the data offset y These bits are written by software to define the channel to which the offset programmed into OFFSETy[25:0] bits applies. Note: The software is allowed to write these bits only when ADSTART = 0 and JADSTART = 0 (which ensures that no conversion is ongoing). If OFFSETy_EN bit is set, it is not allowed to select the same channel in different ADC_OFRy registers. |