The device has some pins dedicated for specific purposes. GPIO pin routing and configuration is flexible. Some pins have limitations or recommendations for configuration and use.
| Function or peripheral | Description |
|---|---|
| GRTC | Has dedicated pins for clock and PWM output. |
| SWD | The debug interface has dedicated pins. With some restrictons, these pins can also be used as GPIO pins as described in the following section. |
| Weak pull-ups | A set of GPIO pins have additional pull-up options, all enabled by a single registers. For more details, see GPIO — General purpose input/output. |