FT11=B_0x0, FT24=B_0x0, FT22=B_0x0, FT21=B_0x0, FT15=B_0x0, FT7=B_0x0, FT6=B_0x0, FT19=B_0x0, FT8=B_0x0, FT5=B_0x0, FT4=B_0x0, FT1=B_0x0, FT14=B_0x0, FT10=B_0x0, FT0=B_0x0, FT20=B_0x0, FT3=B_0x0, FT17=B_0x0, FT9=B_0x0, FT23=B_0x0, FT2=B_0x0, FT16=B_0x0, FT12=B_0x0, FT18=B_0x0, FT13=B_0x0, FT25=B_0x0
EXTI falling trigger selection register
| FT0 | Falling trigger event configuration bit of configurable event input x When EXTI_SECCFGR.SECx is disabled, FTx can be accessed with non-secure and secure access. When EXTI_SECCFGR.SECx is enabled, FTx can only be accessed with secure access. Non-secure write to this FTx is discarded, non-secure read returns 0. When EXTI_PRIVCFGR.PRIVx is disabled, FTx can be accessed with unprivileged and privileged access. When EXTI_PRIVCFGR.PRIVx is enabled, FTx can only be accessed with privileged access. Unprivileged write to this FTx is discarded, unprivileged read returns 0. Note: FT25, FT24, and FT23 bits are only available on some devices in the STM32U5 Series. Refer to the EXTI line connections table for its availability. If not present, consider this bit as reserved and keep at reset value. 0 (B_0x0): Falling trigger disabled (for event and interrupt) for input line 1 (B_0x1): Falling trigger enabled (for event and interrupt) for input line. |
| FT1 | Falling trigger event configuration bit of configurable event input x When EXTI_SECCFGR.SECx is disabled, FTx can be accessed with non-secure and secure access. When EXTI_SECCFGR.SECx is enabled, FTx can only be accessed with secure access. Non-secure write to this FTx is discarded, non-secure read returns 0. When EXTI_PRIVCFGR.PRIVx is disabled, FTx can be accessed with unprivileged and privileged access. When EXTI_PRIVCFGR.PRIVx is enabled, FTx can only be accessed with privileged access. Unprivileged write to this FTx is discarded, unprivileged read returns 0. Note: FT25, FT24, and FT23 bits are only available on some devices in the STM32U5 Series. Refer to the EXTI line connections table for its availability. If not present, consider this bit as reserved and keep at reset value. 0 (B_0x0): Falling trigger disabled (for event and interrupt) for input line 1 (B_0x1): Falling trigger enabled (for event and interrupt) for input line. |
| FT2 | Falling trigger event configuration bit of configurable event input x When EXTI_SECCFGR.SECx is disabled, FTx can be accessed with non-secure and secure access. When EXTI_SECCFGR.SECx is enabled, FTx can only be accessed with secure access. Non-secure write to this FTx is discarded, non-secure read returns 0. When EXTI_PRIVCFGR.PRIVx is disabled, FTx can be accessed with unprivileged and privileged access. When EXTI_PRIVCFGR.PRIVx is enabled, FTx can only be accessed with privileged access. Unprivileged write to this FTx is discarded, unprivileged read returns 0. Note: FT25, FT24, and FT23 bits are only available on some devices in the STM32U5 Series. Refer to the EXTI line connections table for its availability. If not present, consider this bit as reserved and keep at reset value. 0 (B_0x0): Falling trigger disabled (for event and interrupt) for input line 1 (B_0x1): Falling trigger enabled (for event and interrupt) for input line. |
| FT3 | Falling trigger event configuration bit of configurable event input x When EXTI_SECCFGR.SECx is disabled, FTx can be accessed with non-secure and secure access. When EXTI_SECCFGR.SECx is enabled, FTx can only be accessed with secure access. Non-secure write to this FTx is discarded, non-secure read returns 0. When EXTI_PRIVCFGR.PRIVx is disabled, FTx can be accessed with unprivileged and privileged access. When EXTI_PRIVCFGR.PRIVx is enabled, FTx can only be accessed with privileged access. Unprivileged write to this FTx is discarded, unprivileged read returns 0. Note: FT25, FT24, and FT23 bits are only available on some devices in the STM32U5 Series. Refer to the EXTI line connections table for its availability. If not present, consider this bit as reserved and keep at reset value. 0 (B_0x0): Falling trigger disabled (for event and interrupt) for input line 1 (B_0x1): Falling trigger enabled (for event and interrupt) for input line. |
| FT4 | Falling trigger event configuration bit of configurable event input x When EXTI_SECCFGR.SECx is disabled, FTx can be accessed with non-secure and secure access. When EXTI_SECCFGR.SECx is enabled, FTx can only be accessed with secure access. Non-secure write to this FTx is discarded, non-secure read returns 0. When EXTI_PRIVCFGR.PRIVx is disabled, FTx can be accessed with unprivileged and privileged access. When EXTI_PRIVCFGR.PRIVx is enabled, FTx can only be accessed with privileged access. Unprivileged write to this FTx is discarded, unprivileged read returns 0. Note: FT25, FT24, and FT23 bits are only available on some devices in the STM32U5 Series. Refer to the EXTI line connections table for its availability. If not present, consider this bit as reserved and keep at reset value. 0 (B_0x0): Falling trigger disabled (for event and interrupt) for input line 1 (B_0x1): Falling trigger enabled (for event and interrupt) for input line. |
| FT5 | Falling trigger event configuration bit of configurable event input x When EXTI_SECCFGR.SECx is disabled, FTx can be accessed with non-secure and secure access. When EXTI_SECCFGR.SECx is enabled, FTx can only be accessed with secure access. Non-secure write to this FTx is discarded, non-secure read returns 0. When EXTI_PRIVCFGR.PRIVx is disabled, FTx can be accessed with unprivileged and privileged access. When EXTI_PRIVCFGR.PRIVx is enabled, FTx can only be accessed with privileged access. Unprivileged write to this FTx is discarded, unprivileged read returns 0. Note: FT25, FT24, and FT23 bits are only available on some devices in the STM32U5 Series. Refer to the EXTI line connections table for its availability. If not present, consider this bit as reserved and keep at reset value. 0 (B_0x0): Falling trigger disabled (for event and interrupt) for input line 1 (B_0x1): Falling trigger enabled (for event and interrupt) for input line. |
| FT6 | Falling trigger event configuration bit of configurable event input x When EXTI_SECCFGR.SECx is disabled, FTx can be accessed with non-secure and secure access. When EXTI_SECCFGR.SECx is enabled, FTx can only be accessed with secure access. Non-secure write to this FTx is discarded, non-secure read returns 0. When EXTI_PRIVCFGR.PRIVx is disabled, FTx can be accessed with unprivileged and privileged access. When EXTI_PRIVCFGR.PRIVx is enabled, FTx can only be accessed with privileged access. Unprivileged write to this FTx is discarded, unprivileged read returns 0. Note: FT25, FT24, and FT23 bits are only available on some devices in the STM32U5 Series. Refer to the EXTI line connections table for its availability. If not present, consider this bit as reserved and keep at reset value. 0 (B_0x0): Falling trigger disabled (for event and interrupt) for input line 1 (B_0x1): Falling trigger enabled (for event and interrupt) for input line. |
| FT7 | Falling trigger event configuration bit of configurable event input x When EXTI_SECCFGR.SECx is disabled, FTx can be accessed with non-secure and secure access. When EXTI_SECCFGR.SECx is enabled, FTx can only be accessed with secure access. Non-secure write to this FTx is discarded, non-secure read returns 0. When EXTI_PRIVCFGR.PRIVx is disabled, FTx can be accessed with unprivileged and privileged access. When EXTI_PRIVCFGR.PRIVx is enabled, FTx can only be accessed with privileged access. Unprivileged write to this FTx is discarded, unprivileged read returns 0. Note: FT25, FT24, and FT23 bits are only available on some devices in the STM32U5 Series. Refer to the EXTI line connections table for its availability. If not present, consider this bit as reserved and keep at reset value. 0 (B_0x0): Falling trigger disabled (for event and interrupt) for input line 1 (B_0x1): Falling trigger enabled (for event and interrupt) for input line. |
| FT8 | Falling trigger event configuration bit of configurable event input x When EXTI_SECCFGR.SECx is disabled, FTx can be accessed with non-secure and secure access. When EXTI_SECCFGR.SECx is enabled, FTx can only be accessed with secure access. Non-secure write to this FTx is discarded, non-secure read returns 0. When EXTI_PRIVCFGR.PRIVx is disabled, FTx can be accessed with unprivileged and privileged access. When EXTI_PRIVCFGR.PRIVx is enabled, FTx can only be accessed with privileged access. Unprivileged write to this FTx is discarded, unprivileged read returns 0. Note: FT25, FT24, and FT23 bits are only available on some devices in the STM32U5 Series. Refer to the EXTI line connections table for its availability. If not present, consider this bit as reserved and keep at reset value. 0 (B_0x0): Falling trigger disabled (for event and interrupt) for input line 1 (B_0x1): Falling trigger enabled (for event and interrupt) for input line. |
| FT9 | Falling trigger event configuration bit of configurable event input x When EXTI_SECCFGR.SECx is disabled, FTx can be accessed with non-secure and secure access. When EXTI_SECCFGR.SECx is enabled, FTx can only be accessed with secure access. Non-secure write to this FTx is discarded, non-secure read returns 0. When EXTI_PRIVCFGR.PRIVx is disabled, FTx can be accessed with unprivileged and privileged access. When EXTI_PRIVCFGR.PRIVx is enabled, FTx can only be accessed with privileged access. Unprivileged write to this FTx is discarded, unprivileged read returns 0. Note: FT25, FT24, and FT23 bits are only available on some devices in the STM32U5 Series. Refer to the EXTI line connections table for its availability. If not present, consider this bit as reserved and keep at reset value. 0 (B_0x0): Falling trigger disabled (for event and interrupt) for input line 1 (B_0x1): Falling trigger enabled (for event and interrupt) for input line. |
| FT10 | Falling trigger event configuration bit of configurable event input x When EXTI_SECCFGR.SECx is disabled, FTx can be accessed with non-secure and secure access. When EXTI_SECCFGR.SECx is enabled, FTx can only be accessed with secure access. Non-secure write to this FTx is discarded, non-secure read returns 0. When EXTI_PRIVCFGR.PRIVx is disabled, FTx can be accessed with unprivileged and privileged access. When EXTI_PRIVCFGR.PRIVx is enabled, FTx can only be accessed with privileged access. Unprivileged write to this FTx is discarded, unprivileged read returns 0. Note: FT25, FT24, and FT23 bits are only available on some devices in the STM32U5 Series. Refer to the EXTI line connections table for its availability. If not present, consider this bit as reserved and keep at reset value. 0 (B_0x0): Falling trigger disabled (for event and interrupt) for input line 1 (B_0x1): Falling trigger enabled (for event and interrupt) for input line. |
| FT11 | Falling trigger event configuration bit of configurable event input x When EXTI_SECCFGR.SECx is disabled, FTx can be accessed with non-secure and secure access. When EXTI_SECCFGR.SECx is enabled, FTx can only be accessed with secure access. Non-secure write to this FTx is discarded, non-secure read returns 0. When EXTI_PRIVCFGR.PRIVx is disabled, FTx can be accessed with unprivileged and privileged access. When EXTI_PRIVCFGR.PRIVx is enabled, FTx can only be accessed with privileged access. Unprivileged write to this FTx is discarded, unprivileged read returns 0. Note: FT25, FT24, and FT23 bits are only available on some devices in the STM32U5 Series. Refer to the EXTI line connections table for its availability. If not present, consider this bit as reserved and keep at reset value. 0 (B_0x0): Falling trigger disabled (for event and interrupt) for input line 1 (B_0x1): Falling trigger enabled (for event and interrupt) for input line. |
| FT12 | Falling trigger event configuration bit of configurable event input x When EXTI_SECCFGR.SECx is disabled, FTx can be accessed with non-secure and secure access. When EXTI_SECCFGR.SECx is enabled, FTx can only be accessed with secure access. Non-secure write to this FTx is discarded, non-secure read returns 0. When EXTI_PRIVCFGR.PRIVx is disabled, FTx can be accessed with unprivileged and privileged access. When EXTI_PRIVCFGR.PRIVx is enabled, FTx can only be accessed with privileged access. Unprivileged write to this FTx is discarded, unprivileged read returns 0. Note: FT25, FT24, and FT23 bits are only available on some devices in the STM32U5 Series. Refer to the EXTI line connections table for its availability. If not present, consider this bit as reserved and keep at reset value. 0 (B_0x0): Falling trigger disabled (for event and interrupt) for input line 1 (B_0x1): Falling trigger enabled (for event and interrupt) for input line. |
| FT13 | Falling trigger event configuration bit of configurable event input x When EXTI_SECCFGR.SECx is disabled, FTx can be accessed with non-secure and secure access. When EXTI_SECCFGR.SECx is enabled, FTx can only be accessed with secure access. Non-secure write to this FTx is discarded, non-secure read returns 0. When EXTI_PRIVCFGR.PRIVx is disabled, FTx can be accessed with unprivileged and privileged access. When EXTI_PRIVCFGR.PRIVx is enabled, FTx can only be accessed with privileged access. Unprivileged write to this FTx is discarded, unprivileged read returns 0. Note: FT25, FT24, and FT23 bits are only available on some devices in the STM32U5 Series. Refer to the EXTI line connections table for its availability. If not present, consider this bit as reserved and keep at reset value. 0 (B_0x0): Falling trigger disabled (for event and interrupt) for input line 1 (B_0x1): Falling trigger enabled (for event and interrupt) for input line. |
| FT14 | Falling trigger event configuration bit of configurable event input x When EXTI_SECCFGR.SECx is disabled, FTx can be accessed with non-secure and secure access. When EXTI_SECCFGR.SECx is enabled, FTx can only be accessed with secure access. Non-secure write to this FTx is discarded, non-secure read returns 0. When EXTI_PRIVCFGR.PRIVx is disabled, FTx can be accessed with unprivileged and privileged access. When EXTI_PRIVCFGR.PRIVx is enabled, FTx can only be accessed with privileged access. Unprivileged write to this FTx is discarded, unprivileged read returns 0. Note: FT25, FT24, and FT23 bits are only available on some devices in the STM32U5 Series. Refer to the EXTI line connections table for its availability. If not present, consider this bit as reserved and keep at reset value. 0 (B_0x0): Falling trigger disabled (for event and interrupt) for input line 1 (B_0x1): Falling trigger enabled (for event and interrupt) for input line. |
| FT15 | Falling trigger event configuration bit of configurable event input x When EXTI_SECCFGR.SECx is disabled, FTx can be accessed with non-secure and secure access. When EXTI_SECCFGR.SECx is enabled, FTx can only be accessed with secure access. Non-secure write to this FTx is discarded, non-secure read returns 0. When EXTI_PRIVCFGR.PRIVx is disabled, FTx can be accessed with unprivileged and privileged access. When EXTI_PRIVCFGR.PRIVx is enabled, FTx can only be accessed with privileged access. Unprivileged write to this FTx is discarded, unprivileged read returns 0. Note: FT25, FT24, and FT23 bits are only available on some devices in the STM32U5 Series. Refer to the EXTI line connections table for its availability. If not present, consider this bit as reserved and keep at reset value. 0 (B_0x0): Falling trigger disabled (for event and interrupt) for input line 1 (B_0x1): Falling trigger enabled (for event and interrupt) for input line. |
| FT16 | Falling trigger event configuration bit of configurable event input x When EXTI_SECCFGR.SECx is disabled, FTx can be accessed with non-secure and secure access. When EXTI_SECCFGR.SECx is enabled, FTx can only be accessed with secure access. Non-secure write to this FTx is discarded, non-secure read returns 0. When EXTI_PRIVCFGR.PRIVx is disabled, FTx can be accessed with unprivileged and privileged access. When EXTI_PRIVCFGR.PRIVx is enabled, FTx can only be accessed with privileged access. Unprivileged write to this FTx is discarded, unprivileged read returns 0. Note: FT25, FT24, and FT23 bits are only available on some devices in the STM32U5 Series. Refer to the EXTI line connections table for its availability. If not present, consider this bit as reserved and keep at reset value. 0 (B_0x0): Falling trigger disabled (for event and interrupt) for input line 1 (B_0x1): Falling trigger enabled (for event and interrupt) for input line. |
| FT17 | Falling trigger event configuration bit of configurable event input x When EXTI_SECCFGR.SECx is disabled, FTx can be accessed with non-secure and secure access. When EXTI_SECCFGR.SECx is enabled, FTx can only be accessed with secure access. Non-secure write to this FTx is discarded, non-secure read returns 0. When EXTI_PRIVCFGR.PRIVx is disabled, FTx can be accessed with unprivileged and privileged access. When EXTI_PRIVCFGR.PRIVx is enabled, FTx can only be accessed with privileged access. Unprivileged write to this FTx is discarded, unprivileged read returns 0. Note: FT25, FT24, and FT23 bits are only available on some devices in the STM32U5 Series. Refer to the EXTI line connections table for its availability. If not present, consider this bit as reserved and keep at reset value. 0 (B_0x0): Falling trigger disabled (for event and interrupt) for input line 1 (B_0x1): Falling trigger enabled (for event and interrupt) for input line. |
| FT18 | Falling trigger event configuration bit of configurable event input x When EXTI_SECCFGR.SECx is disabled, FTx can be accessed with non-secure and secure access. When EXTI_SECCFGR.SECx is enabled, FTx can only be accessed with secure access. Non-secure write to this FTx is discarded, non-secure read returns 0. When EXTI_PRIVCFGR.PRIVx is disabled, FTx can be accessed with unprivileged and privileged access. When EXTI_PRIVCFGR.PRIVx is enabled, FTx can only be accessed with privileged access. Unprivileged write to this FTx is discarded, unprivileged read returns 0. Note: FT25, FT24, and FT23 bits are only available on some devices in the STM32U5 Series. Refer to the EXTI line connections table for its availability. If not present, consider this bit as reserved and keep at reset value. 0 (B_0x0): Falling trigger disabled (for event and interrupt) for input line 1 (B_0x1): Falling trigger enabled (for event and interrupt) for input line. |
| FT19 | Falling trigger event configuration bit of configurable event input x When EXTI_SECCFGR.SECx is disabled, FTx can be accessed with non-secure and secure access. When EXTI_SECCFGR.SECx is enabled, FTx can only be accessed with secure access. Non-secure write to this FTx is discarded, non-secure read returns 0. When EXTI_PRIVCFGR.PRIVx is disabled, FTx can be accessed with unprivileged and privileged access. When EXTI_PRIVCFGR.PRIVx is enabled, FTx can only be accessed with privileged access. Unprivileged write to this FTx is discarded, unprivileged read returns 0. Note: FT25, FT24, and FT23 bits are only available on some devices in the STM32U5 Series. Refer to the EXTI line connections table for its availability. If not present, consider this bit as reserved and keep at reset value. 0 (B_0x0): Falling trigger disabled (for event and interrupt) for input line 1 (B_0x1): Falling trigger enabled (for event and interrupt) for input line. |
| FT20 | Falling trigger event configuration bit of configurable event input x When EXTI_SECCFGR.SECx is disabled, FTx can be accessed with non-secure and secure access. When EXTI_SECCFGR.SECx is enabled, FTx can only be accessed with secure access. Non-secure write to this FTx is discarded, non-secure read returns 0. When EXTI_PRIVCFGR.PRIVx is disabled, FTx can be accessed with unprivileged and privileged access. When EXTI_PRIVCFGR.PRIVx is enabled, FTx can only be accessed with privileged access. Unprivileged write to this FTx is discarded, unprivileged read returns 0. Note: FT25, FT24, and FT23 bits are only available on some devices in the STM32U5 Series. Refer to the EXTI line connections table for its availability. If not present, consider this bit as reserved and keep at reset value. 0 (B_0x0): Falling trigger disabled (for event and interrupt) for input line 1 (B_0x1): Falling trigger enabled (for event and interrupt) for input line. |
| FT21 | Falling trigger event configuration bit of configurable event input x When EXTI_SECCFGR.SECx is disabled, FTx can be accessed with non-secure and secure access. When EXTI_SECCFGR.SECx is enabled, FTx can only be accessed with secure access. Non-secure write to this FTx is discarded, non-secure read returns 0. When EXTI_PRIVCFGR.PRIVx is disabled, FTx can be accessed with unprivileged and privileged access. When EXTI_PRIVCFGR.PRIVx is enabled, FTx can only be accessed with privileged access. Unprivileged write to this FTx is discarded, unprivileged read returns 0. Note: FT25, FT24, and FT23 bits are only available on some devices in the STM32U5 Series. Refer to the EXTI line connections table for its availability. If not present, consider this bit as reserved and keep at reset value. 0 (B_0x0): Falling trigger disabled (for event and interrupt) for input line 1 (B_0x1): Falling trigger enabled (for event and interrupt) for input line. |
| FT22 | Falling trigger event configuration bit of configurable event input x When EXTI_SECCFGR.SECx is disabled, FTx can be accessed with non-secure and secure access. When EXTI_SECCFGR.SECx is enabled, FTx can only be accessed with secure access. Non-secure write to this FTx is discarded, non-secure read returns 0. When EXTI_PRIVCFGR.PRIVx is disabled, FTx can be accessed with unprivileged and privileged access. When EXTI_PRIVCFGR.PRIVx is enabled, FTx can only be accessed with privileged access. Unprivileged write to this FTx is discarded, unprivileged read returns 0. Note: FT25, FT24, and FT23 bits are only available on some devices in the STM32U5 Series. Refer to the EXTI line connections table for its availability. If not present, consider this bit as reserved and keep at reset value. 0 (B_0x0): Falling trigger disabled (for event and interrupt) for input line 1 (B_0x1): Falling trigger enabled (for event and interrupt) for input line. |
| FT23 | Falling trigger event configuration bit of configurable event input x When EXTI_SECCFGR.SECx is disabled, FTx can be accessed with non-secure and secure access. When EXTI_SECCFGR.SECx is enabled, FTx can only be accessed with secure access. Non-secure write to this FTx is discarded, non-secure read returns 0. When EXTI_PRIVCFGR.PRIVx is disabled, FTx can be accessed with unprivileged and privileged access. When EXTI_PRIVCFGR.PRIVx is enabled, FTx can only be accessed with privileged access. Unprivileged write to this FTx is discarded, unprivileged read returns 0. Note: FT25, FT24, and FT23 bits are only available on some devices in the STM32U5 Series. Refer to the EXTI line connections table for its availability. If not present, consider this bit as reserved and keep at reset value. 0 (B_0x0): Falling trigger disabled (for event and interrupt) for input line 1 (B_0x1): Falling trigger enabled (for event and interrupt) for input line. |
| FT24 | Falling trigger event configuration bit of configurable event input x When EXTI_SECCFGR.SECx is disabled, FTx can be accessed with non-secure and secure access. When EXTI_SECCFGR.SECx is enabled, FTx can only be accessed with secure access. Non-secure write to this FTx is discarded, non-secure read returns 0. When EXTI_PRIVCFGR.PRIVx is disabled, FTx can be accessed with unprivileged and privileged access. When EXTI_PRIVCFGR.PRIVx is enabled, FTx can only be accessed with privileged access. Unprivileged write to this FTx is discarded, unprivileged read returns 0. Note: FT25, FT24, and FT23 bits are only available on some devices in the STM32U5 Series. Refer to the EXTI line connections table for its availability. If not present, consider this bit as reserved and keep at reset value. 0 (B_0x0): Falling trigger disabled (for event and interrupt) for input line 1 (B_0x1): Falling trigger enabled (for event and interrupt) for input line. |
| FT25 | Falling trigger event configuration bit of configurable event input x When EXTI_SECCFGR.SECx is disabled, FTx can be accessed with non-secure and secure access. When EXTI_SECCFGR.SECx is enabled, FTx can only be accessed with secure access. Non-secure write to this FTx is discarded, non-secure read returns 0. When EXTI_PRIVCFGR.PRIVx is disabled, FTx can be accessed with unprivileged and privileged access. When EXTI_PRIVCFGR.PRIVx is enabled, FTx can only be accessed with privileged access. Unprivileged write to this FTx is discarded, unprivileged read returns 0. Note: FT25, FT24, and FT23 bits are only available on some devices in the STM32U5 Series. Refer to the EXTI line connections table for its availability. If not present, consider this bit as reserved and keep at reset value. 0 (B_0x0): Falling trigger disabled (for event and interrupt) for input line 1 (B_0x1): Falling trigger enabled (for event and interrupt) for input line. |