configuration register 1
| MEM_MAP_SEL | Memory mapping selection bits |
| PA11_12_RMP | PA11/PA12 pins remapping bit |
| IR_POL | Infrared output polarity selection |
| IR_SRC_SEL | Infrared modulation envelope signal source selection |
| PB14_UH | PB14 Ultra high sourcing/sinking strength |
| PB13_UH | PB13 Ultra high sourcing/sinking strength |
| PB9_UH | PB9 Ultra high sourcing/sinking strength |
| PB8_UH | PB8 Ultra high sourcing/sinking strength |