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STMPE821 Folha de dados(PDF) 26 Page - STMicroelectronics

Nome de Peças STMPE821
Descrição Electrónicos  8-bit Xpander Logic??with touchkey controller
PDF  55 Pages
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STMPE821 Folha de dados(HTML) 26 Page - STMicroelectronics

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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
3
2
1
0
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
3
2
1
0
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



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