6.5.1.3 XTAL1
The XTAL1 signal on the AVR device is routed to this pin. If the CLOCK switch is set to the INT position, this pin can be used to apply an external clock signal.
The XTAL1 signal on the AVR device is routed to this pin. If the CLOCK switch is set to the INT position, this pin can be used to apply an external clock signal.
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