External Clock Input; Notes On The External Clock Input - Renesas RX100 Series User Manual

RX13T Group
9.3.2

External Clock Input

Figure 9.4 shows connection of an external clock. Set the MOFCR.MOSEL bit to 1 and open the XTAL pin to operate
the oscillator by inputting an external clock signal.
Figure 9.4 Connection Example of External Clock
9.3.3

Notes on the External Clock Input

The frequency of the external clock input can only be changed while the main clock oscillator is stopped. Do not change
the frequency of the external clock input while the setting of the main clock oscillator stop bit (MOSCCR.MOSTP) is 0
(main clock oscillator is operating).
R01UH0822EJ0100 Rev.1.00
Jul 31, 2019
EXTAL
XTAL
External clock input
Open
9. Clock Generation Circuit
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