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STMPE1801BJR Datasheet(PDF) 23 Page - STMicroelectronics

No. de pieza STMPE1801BJR
Descripción Electrónicos  Xpander Logic™ 18-bit enhanced port expander with keypad controller
PDF  60 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STMPE1801BJR Datasheet(HTML) 23 Page - STMicroelectronics

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STMPE1801
Clocking system
Doc ID 17884 Rev 3
23/60
8.0.2
Power mode programming sequence
The device enters auto Hibernate mode when there is inactivity for a fixed period of time.
To wake up the device, the host is required to:
–
Send an I2C transaction to the device.
To do a soft reset to the device, the host needs to do the following:
–
Write a '1' to bit 7 of the SYS_CTRL register. This bit is automatically cleared upon
reset.
To come out of the Hibernate mode, the following needs to be done by the host:
–
Assert a system reset
–
Or put a wakeup on the I2C transaction
–
Interrupt activity



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