STMPE821 datasheet(26/55 Pages) STMICROELECTRONICS

部件名	STMPE821

功能描述	8-bit Xpander Logic??with touchkey controller

PDF	55 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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26 / 55 page

Capacitive touch module registers

STMPE821

26/55

FEATURE_SELECT

Feature select

Address:

0x20

Type:

R/W

Reset:

0x04

Description:

Controls AFS (advanced filtering system and second level filtering feature

ETC_WAIT

Wait time setting

Address:

0x21

Type:

R/W

Reset:

0x27

Description:

Sets the wait time between the calibration and the last button touch

7654

RESERVED

AFS3

AFS2

AFS1

Filter EN

[7:4] RESERVED

[3] AFS3:

Write '1' to enable AFS mode 3

[2] AFS2:

Write '1' to enable AFS mode 2

[1] AFS1:

Write '1' to enable AFS mode 1

[0] Filter EN:

Write '1' to enable filter

7654

ETC_WAIT[7:0]

[7:0] ETC_WAIT[7:0]:

ETC wait time = ETC_Wait[7:0] *64 + sensor clock period

A "non-touch" condition must persist for this wait time, before an ETC operation is carried out.

Range: 800 mS - 12.8 S

STMPE821 数据表(PDF) 26 Page - STMicroelectronics

STMPE821 数据表(HTML) 26 Page - STMicroelectronics

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