configuration register 1
| MEM_MODE | Memory mapping selection bits |
| ADC_DMA_RMP | ADC DMA remapping bit |
| USART1_TX_DMA_RMP | USART1_TX DMA remapping bit |
| USART1_RX_DMA_RMP | USART1_RX DMA request remapping bit |
| TIM16_DMA_RMP | TIM16 DMA request remapping bit |
| TIM17_DMA_RMP | TIM17 DMA request remapping bit |
| I2C_PB6_FM | Fast Mode Plus (FM plus) driving capability activation bits. |
| I2C_PB7_FM | Fast Mode Plus (FM+) driving capability activation bits. |
| I2C_PB8_FM | Fast Mode Plus (FM+) driving capability activation bits. |
| I2C_PB9_FM | Fast Mode Plus (FM+) driving capability activation bits. |
| I2C1_FM_plus | FM+ driving capability activation for I2C1 |
| I2C2_FM_plus | FM+ driving capability activation for I2C2 |
| SPI2_DMA_RMP | SPI2 DMA request remapping bit |
| USART2_DMA_RMP | USART2 DMA request remapping bit |
| USART3_DMA_RMP | USART3 DMA request remapping bit |
| I2C1_DMA_RMP | I2C1 DMA request remapping bit |
| TIM1_DMA_RMP | TIM1 DMA request remapping bit |
| TIM2_DMA_RMP | TIM2 DMA request remapping bit |
| TIM3_DMA_RMP | TIM3 DMA request remapping bit |