Using RX/TX on a ATmega4808

Other Hardware 3rd Party Boards
1

Hello

I am using an ATmega4808 on a project and UNBELIEVABLY I have run out of pins again.

I usually leave the RX and TX pins alone (PA4 and PA5).
If I use these as inputs with pulldown 10k resistors, am I going to get programming issues?

I have a CH340N attached as shown for programming.

68747470733a2f2f692e696d6775722e636f6d2f7a5879577669312e706e67
68747470733a2f2f692e696d6775722e636f6d2f7a5879577669312e706e671920×1047 180 KB

CH340n
CH340n474×602 44.2 KB

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