5.10.4.1 Input Clocks / Oscillators
- The source of the internal system clock (SYS_CLK1) could be either:
- A CMOS clock that enters on the xi_osc0 ball (with xo_osc0 left unconnected on the CMOS clock case).
- A crystal oscillator clock managed by xi_osc0 and xo_osc0.
- The source of the internal system clock (SYS_CLK2) could be either:
- A CMOS clock that enters on the xi_osc1 ball (with xo_osc1 left unconnected on the CMOS clock case).
- A crystal oscillator clock managed by xi_osc1 and xo_osc1.
- The source of the internal system clock (FUNC_32K_CLK) could be either:
- A CMOS clock that enters on the rtc_osc_xi_clkin32 ball and supports external LVCMOS clock generators
- A crystal oscillator clock managed by rtc_osc_xi_clkin32 and rtc_osc_xo.
SYS_CLK1 is received directly from oscillator OSC0. For more information about SYS_CLK1, see Power, Reset, and Clock Management chapter in the device TRM.