Monitoring The Internal Voltage Reference; Figure 109. Vbat Channel Block Diagram; Figure 110. Vrefint Channel Block Diagram - STMicroelectronics RM0365 Reference Manual

Analog-to-digital converters (ADC)
Note: The VBATEN bit must be set to enable the conversion of internal channel ADC1_IN17
(V ).
BATEN
15.3.32

Monitoring the internal voltage reference

It is possible to monitor the internal voltage reference (V
evaluating the ADC V
The internal voltage reference is internally connected to the input channel 18 of the two
ADCs (ADCx_IN18).
Refer to the electrical characteristics section of the STM32F302xx datasheet for the
sampling time value to be applied when converting the internal voltage reference voltage.
Figure 109
Note: The VREFEN bit into ADC12_CCR register must be set to enable the conversion of internal
channels ADC1_IN18 or ADC2_IN18 (V
353/1080
Figure 109. V
voltage level.
REF+
shows the block diagram of the V
Figure 110. V
DocID025202 Rev 7
channel block diagram
BAT
REFINT
sensing feature.
REFINT
channel block diagram
REFINT
).
REFINT
RM0365
) to have a reference point for