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STMPE821 Datasheet(PDF) 2 Page - STMicroelectronics

Part # STMPE821
Description  8-bit Xpander Logic??with touchkey controller
Download  55 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STMPE821 Datasheet(HTML) 2 Page - STMicroelectronics

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Contents
STMPE821
2/55
Contents
1
STMPE821 functional overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.1
STMPE821 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2
Pin assignment and function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.3
STMPE821 typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2
Capacitive compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1
Calibration algorithm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1.1
Noise filtering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.1.2
Data filtering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.2
Power management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3
Power schemes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4I2C interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5
Register map and function description . . . . . . . . . . . . . . . . . . . . . . . . . 13
6
System and identification registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
7
Interrupt controller module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
8
GPIO controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
9
Capacitive touch module registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
10
Basic PWM controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
10.1
PWM function register map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
10.2
Interrupt on basic PWM controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
11
Maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
12
Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
13
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49


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