Table 88. Adc Input/Output Pins; Figure 44. Adc Block Diagram - STMicroelectronics STM32WLEx Reference Manual

RM0461
16.3 ADC functional description
Figure 44
SCANDIR
up/down
CH_SEL[17:0]
single/cont.
V
BAT
V
REFINT
V
dac_out1
ADC_IN[11:0]
Auto-delayed
conversion
stop conversion
TIM1_TRGO2
TIM1_CC4
TIM2_TRGO
TIM2_CH4
TIM2_CH3
EXTI[11]
16.3.1 ADC pins and internal signals
Name
VDDA
VSSA
VREF+
ADC_INx
shows the ADC block diagram and

Figure 44. ADC block diagram

Analog supply
1.62 to 3.6 V
AUTOFF
Auto-off mode
ADEN/ADDIS
CONT
LFTRIG
/3
ADCAL self
Input calibration
selection
TS
& scan
SMP[2:0]
control
sampling
V
IN[x]
time
Start & stop
control
AUTDLY
ADSTART
SW trigger
ADSTP
HW
trigger
EXTEND[1:0]
Trigger enable
and edge
selection
EXTSEL[2:0]
Trigger selection

Table 88. ADC input/output pins

Signal type
Input, analog power
supply
Input, analog supply
ground
Input, analog reference
positive
Analog input signals
Table 88
VREF+
DATA[15:0]
Supply &
reference
SAR ADC
V
IN
CONVERTED
Overs
start
DATA
ampler
OVRMODE
(overrun mode)
ALIGN (left/right)
RES[1:0]
(12, 10, 8 bits)
TOVS
OVSS[3:0]
OVSR[3:0]
OVSE
DISCEN
Discontinuous
mode
Analog power supply and positive reference voltage
for the ADC
Ground for analog power supply
The higher/positive reference voltage for the ADC.
12 external analog input channels
RM0461 Rev 5
Analog-to-digital converter (ADC)
gives the ADC pin description.
AREADY
EOSMP
ADC interrupt IRQ
EOSEQ
EOC
OVR
Master
AWD
AHB
to slave
APB
APB
Master
interface
DMA request
DMAEN
DMACFG
ADC_AWDx_OUT
To analog watchdog
AWDxEN
AWDxSGL
AWDCHx[4:0]
LTx[11:0]
HTx[11:0]
Remarks
CPU
DMA
MSv61353V3
429/1306
486