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STMPE821 Fiches technique(PDF) 32 Page - STMicroelectronics

No de pièce STMPE821
Description  8-bit Xpander Logic??with touchkey controller
PDF  55 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STMPE821 Fiches technique(HTML) 32 Page - STMicroelectronics

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Capacitive touch module registers
STMPE821
32/55
FILTER_PERIOD
Filter period
Address:
0x28
Type:
R/W
Reset:
0x00
Description:
Filter period.
7654
3
2
1
0
FILTER_COUNT
[7:0] FILTER_COUNT:
Additional filter to stabilize touch output in AFS mode.
AFS touch output is monitored for Filter Count [7:0] times every integration time. For each time
a "touch status" is detected, an internal "Filter Counter" is incremented once. This counter
value is then compared with Filter Threshold (register 0x3E)



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