Port bit set/reset register (GPIOn_BSRR)
| BS0 | Set bit 0 |
| BS1 | Set bit 1 |
| BS2 | Set bit 1 |
| BS3 | Set bit 3 |
| BS4 | Set bit 4 |
| BS5 | Set bit 5 |
| BS6 | Set bit 6 |
| BS7 | Set bit 7 |
| BS8 | Set bit 8 |
| BS9 | Set bit 9 |
| BS10 | Set bit 10 |
| BS11 | Set bit 11 |
| BS12 | Set bit 12 |
| BS13 | Set bit 13 |
| BS14 | Set bit 14 |
| BS15 | Set bit 15 |
| BR0 | Reset bit 0 |
| BR1 | Reset bit 1 |
| BR2 | Reset bit 2 |
| BR3 | Reset bit 3 |
| BR4 | Reset bit 4 |
| BR5 | Reset bit 5 |
| BR6 | Reset bit 6 |
| BR7 | Reset bit 7 |
| BR8 | Reset bit 8 |
| BR9 | Reset bit 9 |
| BR10 | Reset bit 10 |
| BR11 | Reset bit 11 |
| BR12 | Reset bit 12 |
| BR13 | Reset bit 13 |
| BR14 | Reset bit 14 |
| BR15 | Reset bit 15 |