Peripheral interconnect matrix

AN4646

10/17

DocID027369 Rev 1

2.2

Analog block

The analog block includes:

•

the ADC block (ADC1)

•

the temperature sensor block.

2.2.1

From temperature sensor to ADC1

On STM32F401/411 devices, the temperature sensor is internally connected to ADC1_IN18

input channel. It is used to convert the sensor output voltage into a digital value.

The Temperature sensor reference manual section describes the connection between

sensor and ADC as well as the procedure to read the converted value.

2.2.2

From Analog block to DMA

Refer to Section 2.6: DMA block.

2.3

Clocks block

The clock block includes:

•

the LSE clock

•

the LSI clock

•

the clock security system (CSS)

•

the real-time clock (RTC)

2.3.1

From CSS to TIM

The CSS can generate system errors. In this case a clock failure event is sent to TIM1 break

inputs.

The purpose of the break function is to protect the power switches driven by PWM signals

generated by the timer.

The list of possible break sources is given in the Using the break function (TIM1) reference

manual section.

2.3.2

From LSE, LSI, RTC to TIM

External clock (LSE), internal clock (LSI) and RTC wakeup interrupt can be input to general-

purpose timer (TIM5 channel 4/TIM11 channel 1).

This feature is described in the following sections of RM0368 and RM0383 reference

manuals:

•

Internal/external clock measurement using TIM5/TIM11

•

TIM5 option register (TIM5_OR)

•

TIM11 option register 1 (TIM11_OR).