EXTI3=B_0x00, EXTI2=B_0x00, EXTI0=B_0x00, EXTI1=B_0x00
EXTI external interrupt selection register
| EXTI0 | EXTI0 GPIO port selection These bits are written by software to select the source input for EXTI0 external interrupt. When EXTI_SECCFGR.SEC0 is disabled, EXTI0 can be accessed with non-secure and secure access. When EXTI_SECCFGR.SEC0 is enabled, EXTI0 can only be accessed with secure access. Non-secure write is discarded and non-secure read returns 0. When EXTI_PRIVCFGR.PRIV0 is disabled, EXTI0 can be accessed with privileged and unprivileged access. When EXTI_PRIVCFGR.PRIV0 is enabled, EXTI0 can only be accessed with privileged access. Unprivileged write to this bit is discarded. Others: reserved 0 (B_0x00): PA0 pin 1 (B_0x01): PB0 pin |
| EXTI1 | EXTI1 GPIO port selection These bits are written by software to select the source input for EXTI1 external interrupt. When EXTI_SECCFGR.SEC1 is disabled, EXTI1 can be accessed with non-secure and secure access. When EXTI_SECCFGR.SEC1 is enabled, EXTI1 can only be accessed with secure access. Non-secure write is discarded and non-secure read returns 0. When EXTI_PRIVCFGR.PRIV1 is disabled, EXTI1 can be accessed with privileged and unprivileged access. When EXTI_PRIVCFGR.PRIV1 is enabled, EXTI1 can only be accessed with privileged access. Unprivileged write to this bit is discarded. Others: reserved 0 (B_0x00): PA1 pin 1 (B_0x01): PB1 pin |
| EXTI2 | EXTI2 GPIO port selection These bits are written by software to select the source input for EXTI2 external interrupt. When EXTI_SECCFGR.SEC2 is disabled, EXTI2 can be accessed with non-secure and secure access. When EXTI_SECCFGR.SEC2 is enabled, EXTI2 can only be accessed with secure access. Non-secure write is discarded and non-secure read returns 0. When EXTI_PRIVCFGR.PRIV2 is disabled, EXTI2 can be accessed with privileged and unprivileged access. When EXTI_PRIVCFGR.PRIV2 is enabled, EXTI2 can only be accessed with privileged access. Unprivileged write to this bit is discarded. Others: reserved 0 (B_0x00): PA2 pin 1 (B_0x01): PB2 pin |
| EXTI3 | EXTI3 GPIO port selection These bits are written by software to select the source input for EXTI3 external interrupt. When EXTI_SECCFGR.SEC3 is disabled, EXTI3 can be accessed with non-secure and secure access. When EXTI_SECCFGR.SEC3 is enabled, EXTI3 can only be accessed with secure access. Non-secure write is discarded and non-secure read returns 0. When EXTI_PRIVCFGR.PRIV3 is disabled, EXTI3 can be accessed with privileged and unprivileged access. When EXTI_PRIVCFGR.PRIV3 is enabled, EXTI3 can only be accessed with privileged access. Unprivileged write to this bit is discarded. Others: reserved 0 (B_0x00): PA3 pin 1 (B_0x01): PB3 pin 7 (B_0x07): PH3 pin |