EXTI halfPort possible values Values are coded as following:

• Bit 7: 0 => the half port is in EXTI_CONF1 register 1 => the half port is in EXTI_CONF2 register
• Bits[6:0] => the half port selection mask.

EXTI Port possible values Values are coded in 0xXY format where X: the register index X = 0: EXTI_CR3 X = 1: EXTI_CR4 Y: the number of shift to be performed.

EXTI PinNum possible values Values are coded in 0xXY format where X: the register index X = 0: EXTI_CR1 X = 1: EXTI_CR2 Y: the number of shift to be performed.

EXTI IT pending bit possible values Values are coded in 0xXY format where X: the register index X = 00: EXTI_SR1 X = 01: EXTI_SR2 Y: the IT pending bit mask.