RCC internal clock source calibration register
| HSICAL | HSI48 clock calibration This bitfield directly acts on the HSI48 clock frequency. Its value is a sum of an internal factory-programmed number and the value of the HSITRIM[6:0] bitfield. In the factory, the internal number is set to calibrate the HSI48 clock frequency to 48 MHz (with HSITRIM[6:0] left at its reset value). Refer to the device datasheet for HSI48 calibration accuracy and for the frequency trimming granularity. Note: The trimming effect presents discontinuities at HSICAL[7:0] multiples of 64. |
| HSITRIM | HSI48 clock trimming The value of this bitfield contributes to the HSICAL[7:0] bitfield value. It allows HSI48 clock frequency user trimming. The HSI48 frequency accuracy as stated in the device datasheet applies when this bitfield is left at its reset value. |