Datasheet

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SAM9X25 [DATASHEET]
11054E–ATARM–10-Mar-2014
8.3 Peripheral Signal Multiplexing on I/O Lines
The SAM9X25 features four PIO Controllers (PIOA, PIOB, PIOC and PIOD) which multiplex the I/O lines of the
peripheral set.
Each PIO Controller controls 32 lines, 19 lines, 32 lines and 22 lines respectively for PIOA, PIOB, PIOC and PIOD. Each
line can be assigned to one of three peripheral functions, A, B or C. Refer to Section 4. “Package and Pinout”, Table 4-3
to see the PIO assignments.