SYSCFG configuration register 2
| FWDISEN | Firewall disable bit |
| CAPA | Configuration of internal VLCD rail connection to optional external capacitor |
| I2C_PB6_FMP | Fm+ drive capability on PB6 enable bit |
| I2C_PB7_FMP | Fm+ drive capability on PB7 enable bit |
| I2C_PB8_FMP | Fm+ drive capability on PB8 enable bit |
| I2C_PB9_FMP | Fm+ drive capability on PB9 enable bit |
| I2C1_FMP | I2C1 Fm+ drive capability enable bit |
| I2C2_FMP | I2C2 Fm+ drive capability enable bit |