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General Purpose Input/Output Port:
Peripheral pin remapping
on-line
 

A special feature, called Peripheral Pin Select, allows the software to configure the input or output pins that are used by a specific peripheral. Without the ability to remap the pins of a digital peripheral, especially for the low pin count devices, it would be very difficult to manage all the conflicts that may occur.

Not all the digital peripherals may have the input or output pins remapped because some of the peripheral modules requires special circuitry on the input/output pins (I2C or USB, for example). Also, keep in mind that no peripheral module with analog inputs can have the inputs or outputs remappable.

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