RM0312 datasheet(54/275 Pages) STMICROELECTRONICS

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Interrupt controller (ITC)

RM0312

54/275

DocID022352 Rev 3

5.9.7

External interrupt status register 2 (EXTI_SR2)

Address offset: 0x04

Reset value: 0x00

5.9.8

External interrupt port select register (EXTI_CONF)

Address offset: 0x05

Reset value: 0x00

654

3210

Reserved

PDF

PBF

rc_w1

Bits 7:2 Reserved

Bit 1 PDF: Port D external interrupt flag

This bit is set by hardware when an interrupt event occurs on the corresponding pin. It is cleared by

writing a ‘1’ by software.

0: No interrupt

1: External interrupt pending

Bit 0 PBF: Port B external interrupt flag

This bit is set by hardware when an interrupt event occurs on the corresponding pin.It is cleared by

writing a ‘1’ by software.

0: No interrupt

1: External interrupt pending

654

3210

Reserved

PDHIS

PDLIS

PBHIS

PBLIS

Bits 7:4 Reserved

Bit 3 PDHIS: Port D[7:4] external interrupt select

It selects pins PD[7:4] for EXTID interrupt.

0: PD[7:4] are used for EXTI7-EXTI4 interrupt generation

1: PD[7:4] are used for EXTID interrupt generation

Bit 2 PDLIS: Port D[3:0] external interrupt select

It selects pins PD[3:0] for EXTID interrupt.

0: PD[3:0] are used for EXTI3-EXTI0 interrupt generation

1: PD[3:0] are used for EXTID interrupt generation

Bit 1 PBHIS: Port B[7:4] external interrupt select

It selects pins PB[7:4] for EXTIB interrupt.

0: PB[7:4] are used for EXTI7-EXTI4 interrupt generation

1: PB[7:4] are used for EXTIB interrupt generation

Bit 0 PBLIS: Port B[3:0] external interrupt select

It selects pins PB[3:0] for EXTIB interrupt.

0: PB[3:0] are used for EXTI3-EXTI0 interrupt generation

1: PB[3:0] are used for EXTIB interrupt generation

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