HIRC8M_VS=Vcor, PSC=div1, X32K_RDY=not, CKRDY=busy, CCD=non_div, CLKSEL=HIRC, X32M_EN=dis, X32M_RDY=not, X32K_EN=dis
Clock Control.
| PSC | Prescaler Select. This 3 bit field sets the system operating frequency by controlling the prescaler that divides the output of the PLL0. 0 (div1): Divide by 1. 1 (div2): Divide by 2. 2 (div4): Divide by 4. 3 (div8): Divide by 8. 4 (div16): Divide by 16. 5 (div32): Divide by 32. 6 (div64): Divide by 64. 7 (div128): Divide by 128. |
| CLKSEL | Clock Source Select. This 3 bit field selects the source for the system clock. 0 (HIRC): HIRC Clock 2 (XTAL32M): 32MHz Crystal is used for the system clock. 3 (LIRC8): 8kHz LIRC is used for the system clock. 4 (HIRC96): The internal 96 MHz oscillator is used for the system clock. 5 (HIRC8): The internal 8 MHz oscillator is used for the system clock. 6 (XTAL32k): 32kHz is used for the system clock. |
| CKRDY | Clock Ready. This read only bit reflects whether the currently selected system clock source is running. 0 (busy): Switchover to the new clock source (as selected by CLKSEL) has not yet occurred. 1 (ready): System clock running from CLKSEL clock source. |
| CCD | Cryptographic clock divider 0 (non_div): The cryptographic accelerator clock is running in non-divided mode. 1 (div): The cryptographic accelerator clock is running in divided mode. |
| X32M_EN | 32MHz Crystal Oscillator Enable. 0 (dis): Is Disabled. 1 (en): Is Enabled. |
| X32K_EN | 32kHz Crystal Oscillator Enable. 0 (dis): Is Disabled. 1 (en): Is Enabled. |
| HIRC_EN | 60MHz High Frequency Internal Reference Clock Enable. |
| HIRC96M_EN | 96MHz High Frequency Internal Reference Clock Enable. |
| HIRC8M_EN | 8MHz High Frequency Internal Reference Clock Enable. |
| HIRC8M_VS | 8MHz High Frequency Internal Reference Clock Voltage Select. This register bit is used to select the power supply to the HIRC8M. 0 (Vcor): VCore Supply 1 (1V): Dedicated 1v regulated supply. |
| X32M_RDY | 32MHz Crystal Oscillator Ready 0 (not): Is not Ready. 1 (ready): Is Ready. |
| X32K_RDY | 32kHz Crystal Oscillator Ready 0 (not): Is not Ready. 1 (ready): Is Ready. |
| HIRC_RDY | 60MHz HIRC Ready. |
| HIRC96M_RDY | 96MHz HIRC Ready. |
| HIRC8M_RDY | 8MHz HIRC Ready. |