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STMPE1801BJR Datasheet(PDF) 21 Page - STMicroelectronics

Part # STMPE1801BJR
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

STMPE1801BJR Datasheet(HTML) 21 Page - STMicroelectronics

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STMPE1801
System controller
Doc ID 17884 Rev 3
21/60
Any keypad activity, interrupt event, hotkey activity or VALID I2C transaction wakes up the
device from Hibernate mode and switches to operational mode automatically.
7.2.2
Keypress detect in the Hibernate mode
When in Hibernate mode, any keypress detected causes the system to go into operational
mode (~48 µs). The system will then de-bounce the key to detect a valid key. If the keypress
detected is valid, the system stays in operation mode. If the key detected is invalid, the
system goes back into Hibernate mode.



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