STM32L431 datasheet(26/200 Pages) STMICROELECTRONICS

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Functional overview

STM32L431xx

26/200

DocID028800 Rev 1

3.10

Interconnect matrix

Several peripherals have direct connections between them. This allows autonomous

communication between peripherals, saving CPU resources thus power supply

consumption. In addition, these hardware connections allow fast and predictable latency.

Depending on peripherals, these interconnections can operate in Run, Sleep, low-power run

and sleep, Stop 0, Stop 1 and Stop 2 modes.

Table 5. STM32L431xx peripherals interconnect matrix

Interconnect source

Interconnect

destination

Interconnect action

TIMx

Timers synchronization or chaining

ADCx

DACx

Conversion triggers

DMA

Memory to memory transfer trigger

COMPx

Comparator output blanking

TIM15/TIM16

IRTIM

Infrared interface output generation

COMPx

TIM1

TIM2

Timer input channel, trigger, break from

analog signals comparison

LPTIMERx

Low-power timer triggered by analog

signals comparison

(1)

ADCx

TIM1

Timer triggered by analog watchdog

RTC

TIM16

Timer input channel from RTC events

LPTIMERx

Low-power timer triggered by RTC alarms

or tampers

(1)

All clocks sources (internal

and external)

TIM2

TIM15, 16

Clock source used as input channel for

RC measurement and trimming

CSS

CPU (hard fault)

RAM (parity error)

Flash memory (ECC error)

COMPx

PVD

TIM1

TIM15,16

Timer break

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