STMPE1801 datasheet(28/60 Pages) STMICROELECTRONICS

部件名	STMPE1801

功能描述	Xpander Logic™ 18-bit enhanced port expander with keypad controller

PDF	60 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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28 / 60 page

Interrupt system

STMPE1801

28/60

Doc ID 17884 Rev 3

INT_STA

Interrupt status register

Address:

08, 09

Type:

Reset:

0x00

Description:

The interrupt status register monitors the status of the interruption from a particular

interrupt source to the host. The INT_STA bits are constantly updated regardless

whether the INT_EN bits are enabled or not.

98765

43210

INT_STA_HIGH

INT_STA _LOW

RESERVED

IS4

IS3

IS2

IS1

IS0

RRRRRRRR

00000

00001

[15:4] RESERVED

[4:0] IS[x]

Interrupt status (where x = 3 to 0)

Read:

IS0: Wake-up interrupt status

IS1: Keypad controller interrupt status

IS2: Keypad controller FIFO overflow interrupt status

IS3: GPIO controller interrupt status

IS4: Combination key interrupt status

Reading the INT_STA register clears all interrupt status bits to ‘0’ which had been set to ‘1’

prior to the read event.

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