4 Pinout and Packaging
Each pin is controlled by the I/O Pin Controller (PORT) as a general purpose I/O and alternatively can be assigned to one of the peripheral functions: A, B, C, D, E, G, H, I, J, or K.
The following tables describe the peripheral signals multiplexed to the PORT I/O pins for each package.
CAUTION: I/Os for SERCOM and
I2S peripherals are grouped into I/O sets, listed in their ‘IOSET’
column. For these peripherals, it is mandatory to use I/Os that belong to the same I/O
set. The peripheral’s timings are not guaranteed when I/Os from different I/O sets are
mixed.
The column “Reset State” indicates the reset state of the
line with mnemonics:
- "I/O" or "Peripheral Function" indicates whether the I/O pin resets in I/O mode or in peripheral function mode.
- “I”/”O”/"Hi-Z" indicates whether the I/O is configured as an input, output, or is tri-stated.
- “PU”/“PD” indicates whether pull up, pull down, or nothing is enabled.
Note: The schematic checklist chapter provides the user with the requirements
regarding the different pin connections that must be considered before starting any new
board design as well as information on the minimum hardware resources required to
quickly develop an application.