From Tim And Exti To Adc; From Opamp To Adc; From Ts To Adc; From Vbat To Adc - STMicroelectronics RM0365 Reference Manual

Peripheral interconnect matrix
7.3.4

From TIM and EXTI to ADC

General-purpose timers (TIM2/TIM3/TIM4), basic timers (TIM6), advanced-control timer
(TIM1), general-purpose timer (TIM15/TIM16/TIM17) and EXTI can be used to generate an
ADC triggering event.
The output (from timer) is on signal TIMx_TRGO, TIMx_TRGO2 or TIMx_CCx event.
The input (to ADC) is on signal EXT[15:0], JEXT[15:0].
The connection between timers and ADCs or also EXTI & ADCs is provided in:
• Table 87: ADC1 (master) & 2 (slave) - External triggers for regular channels
•
Table 88: ADC1 & ADC2 - External trigger for injected channels
7.3.5

From OPAMP to ADC

There are two interconnection types:
1. Connect OPAMP output reference voltage to an internal ADC channel. This connection
can be used for OPAMP calibration. For more details, please refer to the Section
Calibration in the OPAMP chapter.
Section 15.3.11: Channel selection (SQRx, JSQRx)
to be used.
1. Only in STM32F302xB/C/D/E.
2. OPAMPx output, x = 1, 2 can be connected to ADCy channels, y= 1, 2 through the
GPIOs. See summary in the table below. Refer to
outputs as ADC
1. Only in STM32F302xB/C/D/E.
7.3.6

From TS to ADC

Internal temperature sensor (VTS) is connected internally to ADC1_IN16. Refer to
Section 15.3.30: Temperature
7.3.7

From VBAT to ADC

VBAT/2 output voltage can be converted using ADC1_IN17. This interconnection is
explained in
91/1080

Table 17. VREFOPAMPx to ADC channel

VREFOPAMPx
(1)
VREFOPAMP1
VREFOPAMP2
inputs.

Table 18. OPAMP output to ADC input

OPAMPx output
(1)
OPAMP1_VOUT
OPAMP2_VOUT
sensor.
Section 15.3.31: VBAT supply
DocID025202 Rev 7
provides the exact ADC channels
ADC channel
ADC1_IN15
ADC2_IN17
Section 18.3.4: Using the OPAMP
ADC channel
ADC1_IN3
(1)
ADC2_IN3
monitoring.
RM0365
(1)
Used pins
PA2
PA6