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STMPE321 Fiches technique(PDF) 30 Page - STMicroelectronics

No de pièce STMPE321
Description  3-channel capacitive touchkey controller
PDF  40 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STMPE321 Fiches technique(HTML) 30 Page - STMicroelectronics

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Capacitive touch module registers
STMPE321
30/40
Doc ID 15791 Rev 3
TVR
Touch variance setting
Address:
0x30 - 0x32
Type:
R/W
Reset:
0x08
Description:
Touch variance setting
EVR
Environmental variance
Address:
0x40
Type:
R/W
Reset:
0x04
Description:
Environmental variance setting.
STRENGTH_THRESHOLD
Strength threshold
Address:
0x50 - 0x52
Type:
R/W
Reset:
0x01
Description:
Strength threshold.
76
543
2
1
0
RESERVED
TVR
[7] RESERVED
[6:0] TVR:
Setting TVR between 0-99
A high TVR value decreases sensitivity of the sensor, but increases its tolerance to ambient
noise
A small TVR value increases the sensitivity
76
543
2
1
0
RESERVED
TVR
[7] RESERVED
[6] EVR:
EVR is used to detect "Non-Touch" condition
76
543
2
1
0
STRENGTH_THRESHOLD
[7:0] STRENGTH_THRESHOLD:
Setting threshold to be used in AFS mode to determine valid touch



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