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STMPE1801 Datasheet(PDF) 46 Page - STMicroelectronics

Part # STMPE1801
Description  Xpander Logic™ 18-bit enhanced port expander with keypad controller
PDF  60 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STMPE1801 Datasheet(HTML) 46 Page - STMicroelectronics

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STMPE1801
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Doc ID 17884 Rev 3
11.3
Data registers
The KPC_DATA register contains five bytes of information. The first three bytes store the key
coordinates and status of any three keys from the normal key matrix, while the fourth byte
stores the status of special function keys and the fifth byte consists of the status of
dedicated keys.
Note:
When accessing the KPC DATA FIFO, it is mandatory to read all five bytes of KPC_Data
registers together consecutively.



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