GPIO port bit set/reset register
| BS0 | Port x set bit y (y= 0…15) |
| BS1 | Port x set bit y (y= 0…15) |
| BS2 | Port x set bit y (y= 0…15) |
| BS3 | Port x set bit y (y= 0…15) |
| BS4 | Port x set bit y (y= 0…15) |
| BR0 | Port x set bit y (y= 0…15) |
| BR1 | Port x reset bit y (y = 0…15) |
| BR2 | Port x reset bit y (y = 0…15) |
| BR3 | Port x reset bit y (y = 0…15) |
| BR4 | Port x reset bit y (y = 0…15) |