Data direction register for port n
| IO0 | Selects pin x as input or output (x = 0 to 11). 0 = Pin PIOn_x is configured as input. 1 = Pin PIOn_x is configured as output. |
| IO1 | Selects pin x as input or output (x = 0 to 11). 0 = Pin PIOn_x is configured as input. 1 = Pin PIOn_x is configured as output. |
| IO2 | Selects pin x as input or output (x = 0 to 11). 0 = Pin PIOn_x is configured as input. 1 = Pin PIOn_x is configured as output. |
| IO3 | Selects pin x as input or output (x = 0 to 11). 0 = Pin PIOn_x is configured as input. 1 = Pin PIOn_x is configured as output. |
| IO4 | Selects pin x as input or output (x = 0 to 11). 0 = Pin PIOn_x is configured as input. 1 = Pin PIOn_x is configured as output. |
| IO5 | Selects pin x as input or output (x = 0 to 11). 0 = Pin PIOn_x is configured as input. 1 = Pin PIOn_x is configured as output. |
| IO6 | Selects pin x as input or output (x = 0 to 11). 0 = Pin PIOn_x is configured as input. 1 = Pin PIOn_x is configured as output. |
| IO7 | Selects pin x as input or output (x = 0 to 11). 0 = Pin PIOn_x is configured as input. 1 = Pin PIOn_x is configured as output. |
| IO8 | Selects pin x as input or output (x = 0 to 11). 0 = Pin PIOn_x is configured as input. 1 = Pin PIOn_x is configured as output. |
| IO9 | Selects pin x as input or output (x = 0 to 11). 0 = Pin PIOn_x is configured as input. 1 = Pin PIOn_x is configured as output. |
| IO10 | Selects pin x as input or output (x = 0 to 11). 0 = Pin PIOn_x is configured as input. 1 = Pin PIOn_x is configured as output. |
| IO11 | Selects pin x as input or output (x = 0 to 11). 0 = Pin PIOn_x is configured as input. 1 = Pin PIOn_x is configured as output. |
| RESERVED | Reserved |