GPIO secure configuration register
| SEC0 | I/O pin of Port x secure bit enable |
| SEC1 | I/O pin of Port x secure bit enable |
| SEC2 | I/O pin of Port x secure bit enable |
| SEC3 | I/O pin of Port x secure bit enable |
| SEC4 | I/O pin of Port x secure bit enable |
| SEC5 | I/O pin of Port x secure bit enable |
| SEC6 | I/O pin of Port x secure bit enable |
| SEC7 | I/O pin of Port x secure bit enable |
| SEC8 | I/O pin of Port x secure bit enable |
| SEC9 | I/O pin of Port x secure bit enable |
| SEC10 | I/O pin of Port x secure bit enable |
| SEC11 | I/O pin of Port x secure bit enable |
| SEC12 | I/O pin of Port x secure bit enable |
| SEC13 | I/O pin of Port x secure bit enable |
| SEC14 | I/O pin of Port x secure bit enable |
| SEC15 | I/O pin of Port x secure bit enable |