STM32F303VB Просмотр технического описания (PDF) - STMicroelectronics

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STM32F303VB

ARM Cortex-M4F 32b MCU+FPU, up to 256KB Flash+48KB SRAM 4 ADCs, 2 DAC ch., 7 comp, 4 PGA, timers, 2.0-3.6 V operation

STMicroelectronics 

STM32F302xx/STM32F303xx

Functional overview

3.12.3

3.12.4

VBAT battery voltage monitoring

This embedded hardware feature allows the application to measure the VBAT battery voltage

using the internal ADC channel ADC_IN17. As the VBAT voltage may be higher than VDDA,

and thus outside the ADC input range, the VBAT pin is internally connected to a bridge

divider by 2. As a consequence, the converted digital value is half the VBAT voltage.

OPAMP reference voltage (VOPAMP)

Every OPAMP reference voltage can be measured using a corresponding ADC internal

channel: VOPAMP1 connected to ADC1 channel 15, VOPAMP2 connected to ADC2

channel 17, VOPAMP3 connected to ADC3 channel 17, VOPAMP4 connected to ADC4

channel 17.

Doc ID 023353 Rev 5

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