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STMPE821QTR Datasheet(PDF) 2 Page - STMicroelectronics

Part # STMPE821QTR
Description  8-channel capacitive touch key controller
Download  55 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STMPE821QTR Datasheet(HTML) 2 Page - STMicroelectronics

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Contents
STMPE821
2/55
Contents
1
STMPE821 functional overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1
STMPE821 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.2
Pin assignment and function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.3
STMPE821 typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.4
Calibration algorithm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.4.1
Noise filtering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.4.2
Data filtering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.5
Power management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2
Power schemes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3
I2C interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4
Register map and function description . . . . . . . . . . . . . . . . . . . . . . . . . 14
5
System and identification registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
6
Interrupt controller module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
7
GPIO controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
8
Capacitive touch module registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
9
Basic PWM controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
9.1
PWM function register map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
9.2
Interrupt on basic PWM controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
10
Maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
11
Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
12
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
13
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54


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