5.9.4.1 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.
SYS_CLK1 is received directly from oscillator OSC0. For more information about SYS_CLK1, see the Power, Reset, and Clock Management section in the device TRM.