[SOLVED] Voltage needed for PIC16F877A PIN Input goes high

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Hi guys,

i using sensor sends data into the PIC16F877A. How much voltage need to provide to PIC in order for the PIC to pin goes high from low when it is detect the sensor such as coding [If (RA0==1)].
 

Thanks Barry, I Found it inside datasheet !!! i don't know inside datasheet have it.
 

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