Analog-to-digital converter (ADC) RM0390
356/1328 RM0390 Rev 4
13.3.1 ADC on-off control
The ADC is powered on by setting the ADON bit in the ADC_CR2 register. When the ADON
bit is set for the first time, it wakes up the ADC from the Power-down mode.
Conversion starts when either the SWSTART or the JSWSTART bit is set.
You can stop conversion and put the ADC in power down mode by clearing the ADON bit. In
this mode the ADC consumes almost no power (only a few µA).
Table 84. ADC pins
Name Signal type Remarks
V
REF+
Input, analog reference
positive
The higher/positive reference voltage for the ADC,
1.8 V V
REF+
V
DDA
V
DDA
Input, analog supply
Analog power supply equal to V
DD
and
2.4 V V
DDA
V
DD
(3.6 V) for full speed
1.8 V V
DDA
V
DD
(3.6 V) for reduced speed
V
REF–
Input, analog reference
negative
The lower/negative reference voltage for the ADC,
V
REF–
=
V
SSA
V
SSA
Input, analog supply
ground
Ground for analog power supply equal to V
SS
ADCx_IN[15:0] Analog input signals 16 analog input channels
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