STMPE2401 datasheet(22/55 Pages) STMICROELECTRONICS

部件名	STMPE2401

功能描述	24-bit Enhanced port expander with Keypad and PWM controller Xpander logic

PDF	55 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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22 / 55 page

Interrupt system

STMPE2401

22/55

Interrupt system

STMPE2401 uses a highly flexible interrupt system. It allows host system to configure the

type of system events that should result in an interrupt, and pinpoints the source of interrupt

by status register. The INT pin could be configured as ACTIVE HIGH, or ACTIVE LOW.

32KHz clock input or crystal must be available for the interrupt system to be functional.

INT pin is 3.3V tolernat.

Once asserted, the INT pin would de-assert only if the corresponding bit in the

InterruptStatus register is cleared.

Figure 7.

Interrupt system

9.1

Table 20. Register map of interrupt system

Address

Description

Auto-Increment

(during sequential R/W)

0x10

ICR_msb

Interrupt Control Register

Yes

0x11

ICR_lsb

Yes

0x12

IER_msb

Interrupt Enable Mask Register

Yes

0x13

IER_lsb

Yes

0x14

ISR_msb

Interrupt Status Register

Yes

0x15

ISR_lsb

Yes

0x16

IEGPIOR_msb

Interrupt Enable GPIO Mask

Yes

0x17

IEGPIOR_mid

Yes

0x18

IEGPIOR_lsb

Yes

0x19

IEGPIOR_msb

Interrupt Status GPIO Register

Yes

0x1A

ISGPIOR_mid

Yes

0x1B

ISGPIOR_lsb

Yes

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