Hi,Is it possible to use the ADC to monitor the battery supply voltage down to 1.8V just before the micro stops working. Due to the reference (2.048) I can only correctly read down to 2.4VThanks am
Hi TDK,Changed sample time from ADC_SAMPLETIME_2CYCLES_5 to ADC_SAMPLETIME_640CYCLES_5With VREFBUF set to external voltage ref and final calculation vdda = (1.21 * VBAT * 3) / VREFINTDrum roll ......VDDA: 3.3V, VREFINT: 1443, VBAT: 1309, vdda: 3.290V...
Hi TDKWith VREFBUF set to external voltage ref:VDDA: 3.3V, VREFINT: 1393, VBAT: 923VDDA: 3.0V, VREFINT: 1512, VBAT: 893VDDA: 2.5V, VREFINT: 1900, VBAT: 806VDDA: 2.0V, VREFINT: 1274-1354, VBAT: 772-778With the micro now not in VREF BUF OFF mode - the ...
Hi TDK,Yea I'm not quite getting something, here is what I have:I have the supply VDDA of 3.3V connected to VREF+ input pin of the STM32WB55In CubeMX I have only ticked Vbat channel for ADC1, everything else is DisabledIn CubeMX for VREFBUF Mode I ha...
Hi TDK,As the supply voltage goes below 2.4V the reading starts to go up again and then down, typically at 2.0 volts supply the calculation is 2.5V !The STM32WD55 has only 2 possible references 2.5V and 2.048V - Wheras other ST processors have inter...
