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STMPE1801BJR Datasheet(PDF) 3 Page - STMicroelectronics

Part # STMPE1801BJR
Description  Xpander Logic??18-bit enhanced port expander with keypad controller
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STMPE1801BJR Datasheet(HTML) 3 Page - STMicroelectronics

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STMPE1801
Contents
Doc ID 17884 Rev 3
3/60
8
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Clocking system 22
8.0.1
Clock source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
8.0.2
Power mode programming sequence . . . . . . . . . . . . . . . . . . . . . . . . . . 23
9
Interrupt system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
9.1
Interrupt system register map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
9.2
Interrupt latency for the GPIO hot keys . . . . . . . . . . . . . . . . . . . . . . . . . . 25
9.3
Programming sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
10
GPIO controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
10.1
GPIO control registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
10.1.1
Bit description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
10.2
Hotkey feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
10.2.1
Programming sequence for Hotkey . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
10.2.2
Minimum pulse width . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
11
Keypad controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
11.1
Keypad configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
11.2
Keypad controller registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
11.3
Data registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
11.4
Keypad combination key registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
11.5
Using the keypad controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
11.5.1
Ghost key handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
11.5.2
Key detection priority . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
11.5.3
Keypad wakeup from Hibernate mode . . . . . . . . . . . . . . . . . . . . . . . . . . 52
11.5.4
Keypad controller combination key interrupt . . . . . . . . . . . . . . . . . . . . . 52
12
Miscellaneous features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
12.1
Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
13
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
14
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59


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