clock sources

13.2.1 Clock Sources 13.2.1.1 External Oscillator Clock Area The external oscillator includes an external high-speed oscillator (main clock oscillator) and an external low-speed oscillator (sub-clock oscillator). Main Clock Oscillator (MOSC): Main clock oscillator RA6M5/RA4M2 connects to an external 8~24MHz high-speed crystal oscillator (connected to pins EXTAL, XTAL); RA2L1 connects to an external 1~20MHz high-speed crystal … Read more