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STMPE321 Fiches technique(PDF) 23 Page - STMicroelectronics

No de pièce STMPE321
Description  3-channel capacitive touchkey controller
PDF  40 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STMPE321 Fiches technique(HTML) 23 Page - STMicroelectronics

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STMPE321
GPIO controller
Doc ID 15791 Rev 3
23/40
The function of each bit is shown inTable 9:
Table 9.
GPIO control bits function
Register name
Function
GPIO monitor pin state
Reading this bit yields the current state of the bit. Writing has no
effect.
GPIO set pin state
Writing '1' to this bit causes the corresponding GPIO to go to '1' state
Writing '0' to this bit causes the corresponding GPIO to go to '0' state
GPIO set pin direction
'0' sets the corresponding GPIO to input state, and '1' sets it to output
state. All bits are '0' on reset.
GPIO function
'1' sets the corresponding GPIO to function as GPIO, and '0' sets it to
touchkey mode.



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