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STMPE2401 Datasheet(PDF) 49 Page - STMicroelectronics

Part # STMPE2401
Description  24-bit Enhanced port expander with Keypad and PWM controller Xpander logic
PDF  55 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STMPE2401 Datasheet(HTML) 49 Page - STMicroelectronics

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STMPE2401
Rotator controller
49/55
The host should do the following on the I2C bus to start the Rotator controller:
1.
The host writes to GPIO Controller to configure the PU/PD bit and select the Rotator
Bits on the relevant IO.
2.
Write Rotator_Control data register to start the rotator controller. A maximum of 2
rotations later, the correct initial state on the rotator FSM is obtained. Scanning for
rotator movement continues.
3.
The host waits for interrupt from the rotator controller.
4.
The host reads Rotator_Buffer
5.
The host can stop rotator controller operation by writing to Rotator_Control register.



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