EXTI pins located at which port pins of STM32H753ZI MCU?

[LPola]

Hi team,

I would like to use the external interrupt for handling peripherals, but i didn't find the exact port pin of MCU. for example EXTI0 is an external interrupt pin which is located at?

[waclawek.jan]

PA0, or PB0, or PC0, etc., as selected by SYSCFG_EXTICR1.EXTI0.

JW

[LPola]

!

[LPola]

Thank you.

1) In PA0 : The alternate functionalites are TIM2_CH1/TIM2_ETR, TIM5_CH1, TIM8_ETR, TIM15_BKIN, USART2_CTS/USART2_ NSS, UART4_TX, SDMMC2_CMD, SAI2_SD_B, ETH_MII_CRS, EVENTOUT.

Additional Functions are ADC1_INP16, WKUP0.

2) In PB0 : The alternate functionalites are TIM1_CH2N, TIM3_CH3, TIM8_CH2N, DFSDM1_CKOUT, UART4_CTS, LCD_R3, OTG_HS_ULPI_D1, ETH_MII_RXD2, LCD_G1, EVENTOUT

Additional Functions are ADC12_INN5, ADC12_INP9, OPAMP1_VINP, COMP1_INP.

3) In PC0 : The alternate functionalites are DFSDM1_CKIN0, DFSDM1_DATIN4, SAI2_FS_B, OTG_HS_ULPI_STP, FMC_SDNWE, LCD_R5, EVENTOUT.

Additional Functions are ADC123_ INP10.

Of these multi functionalities which of them is external interrupt?

[waclawek.jan]

> Of these multi functionalities which of them is external interrupt?

None; external interrupt is independent from the alternate functions, and can be used simultaneously with them.

JW

[LPola]

Thank you,

You mean to use the concept of external interrupt we can connect to any of the pins and can be configured by using the registers you specified SYSCFG_EXTICR1.EXTI0?

[waclawek.jan · Accepted solution]

Yes, unless the given pin is set to Analog mode.

SYSCFG_EXTICR1.EXTI0 is specifically for EXTI0, other EXTI have their respective fields in other SYSCFG_EXTICRx registers, refer to the SYSCFG chapter in RM.

JW

[LPola]

Thank you so much.