RTCCLKOUTSEL=0, USBSLSRC=0, CLKOUTSEL=000, TIMESRC=00, RMIISRC=0, TRACECLKSEL=0, SDHCSRC=00, TPMSRC=00, FBSL=00, USBSRC=0, LPUARTSRC=00, PLLFLLSEL=00, USBREGEN=0
System Options Register 2
| USBSLSRC | USB Slow Clock Source 0 (0): MCGIRCLK 1 (1): RTC 32.768kHz clock |
| USBREGEN | USB PHY PLL Regulator Enable 0 (0): USB PHY PLL Regulator disabled. 1 (1): USB PHY PLL Regulator enabled. |
| RTCCLKOUTSEL | RTC clock out select 0 (0): RTC 1 Hz clock is output on the RTC_CLKOUT pin. 1 (1): RTC 32.768kHz clock is output on the RTC_CLKOUT pin. |
| CLKOUTSEL | CLKOUT select 0 (000): FlexBus CLKOUT 2 (010): Flash clock 3 (011): LPO clock (1 kHz) 4 (100): MCGIRCLK 5 (101): RTC 32.768kHz clock 6 (110): OSCERCLK0 7 (111): IRC 48 MHz clock |
| FBSL | FlexBus security level 0 (00): All off-chip accesses (instruction and data) via the FlexBus or SDRAM are disallowed. 1 (01): All off-chip accesses (instruction and data) via the FlexBus or SDRAM are disallowed. 2 (10): Off-chip instruction accesses are disallowed. Data accesses are allowed. 3 (11): Off-chip instruction accesses and data accesses are allowed. |
| TRACECLKSEL | Debug trace clock select 0 (0): MCGOUTCLK, divided by the TRACECLK fractional divider as configured by SIM_CLKDIV4[TRACEFRAC, TRACEDIV] 1 (1): Core/system clock |
| PLLFLLSEL | PLL/FLL clock select 0 (00): MCGFLLCLK clock 1 (01): MCGPLLCLK clock 2 (10): USB1 PFD clock 3 (11): IRC48 MHz clock |
| USBSRC | USB clock source select 0 (0): External bypass clock (USB_CLKIN). 1 (1): MCGFLLCLK, or MCGPLLCLK , or IRC48M , or USB1 PFD clock as selected by SOPT2[PLLFLLSEL], and then divided by the USB fractional divider as configured by SIM_CLKDIV2[USBFRAC, USBDIV]. |
| RMIISRC | RMII clock source select 0 (0): EXTAL clock 1 (1): External bypass clock (ENET_1588_CLKIN). |
| TIMESRC | IEEE 1588 timestamp clock source select 0 (00): Core/system clock. 1 (01): MCGFLLCLK , or MCGPLLCLK , or IRC48M , or USB1 PFD clock as selected by SOPT2[PLLFLLSEL]. 2 (10): OSCERCLK clock 3 (11): External bypass clock (ENET_1588_CLKIN). |
| TPMSRC | TPM clock source select 0 (00): Clock disabled 1 (01): MCGFLLCLK , or MCGPLLCLK , or IRC48M , or USB1 PFD clock as selected by SOPT2[PLLFLLSEL], and then divided by the PLLFLLCLK fractional divider as configured by SIM_CLKDIV3[PLLFLLFRAC, PLLFLLDIV]. 2 (10): OSCERCLK clock 3 (11): MCGIRCLK clock |
| LPUARTSRC | LPUART clock source select 0 (00): Clock disabled 1 (01): MCGFLLCLK , or MCGPLLCLK , or IRC48M , or USB1 PFD clock as selected by SOPT2[PLLFLLSEL], and then divided by the PLLFLLCLK fractional divider as configured by SIM_CLKDIV3[PLLFLLFRAC, PLLFLLDIV]. 2 (10): OSCERCLK clock 3 (11): MCGIRCLK clock |
| SDHCSRC | SDHC clock source select 0 (00): Core/system clock. 1 (01): MCGFLLCLK, or MCGPLLCLK , or IRC48M , or USB1 PFD clock as selected by SOPT2[PLLFLLSEL]. 2 (10): OSCERCLK clock 3 (11): External bypass clock (SDHC0_CLKIN) |