AN4651 datasheet(28/34 Pages) STMICROELECTRONICS

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Interconnection descriptions

AN4651

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DocID027426 Rev 1

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

generated by the timers.

3.17

From HSE, HSI, LSE, LSI, MCO, RTC to TIM

For all STM32F3 series devices except STM32F37x devices, TIM16 can be used for the

measurement of internal/external clock sources. TIM16 channel1 input capture is connected

to HSE/32, GPIO, RTC clock and MCO to output clocks among (HSE, HSI, LSE, LSI,

SYSCLK, PLLCLK, PLLCLK/2).

The selection is performed through the TI1_RMP [1:0] bits in the TIM16_OR register.

This allows calibrating the HSI/LSI clocks.

TIM14 is used in STM32F37x devices for the same purpose.

3.18

From TIM and EXTI to DAC

A timer counter can be used as a trigger for DAC conversions.

The TRGO event is the internal signal that will trigger conversion.

Table 14 provides a summary of DAC interconnections with timers.

Table 14. Timer and EXTI signals triggering DAC conversions(1)

The gray shading in table cells means Not Applicable.

DAC1

DAC2

TIM8

TIM2

TIM3

TIM4

xx(2)

Only for STM32F37x devices.

TIM6

TIM7

TIM15

x(3)

Not applicable for STM32F37x.

x(3)

TIM18

EXTI line9

AN4651 Datasheet(PDF) 28 Page - STMicroelectronics