4.1 Input/Output Settings
The I/O table displays all available pins and their configuration options.
| Column | Description |
|---|---|
| Pin | The physical pin number or name |
| Designation | The function assigned to the pin (e.g., GPIO, CS0, CLKO, CTS) |
| Direction | Input or Output |
| Option | Additional options for the pin; shows N/A when no options are available |
| Pull-up | Enables or disables the internal pull-up resistor (toggle) |
| Open-Drain | Enables or disables open-drain output mode (toggle) |
Constraints:
- Pull-Up is disabled when the direction is set to Output
- Open-Drain is disabled when the direction is set to Input or the designation is CLKO or CS0–CS3
Note: The SPI Chip Select pins (CS0–CS3) must be enabled here before they can be configured in the SPI Settings tab.