It looks like all the El Escudo Dos digital pins are loaded with a series diode & 390 ohm resistor. I have an Arduino Uno. If I use the El Escudo Dos, am I losing the ability to use the external interrupts available on D2 and D3 (I'm trying to add an interrupt driven rotary encoder on the same project)?
If so, is there a way on the El Escudo Dos, if I don't need ELA and ELB, that I can recover the use of D2 and D3 without cutting traces, for instance. I'm thinking of cutting the shield pins for D2 and D3 as the most practical, reversible solution.
A Leonardo is attractive, but I'd like to keep serial available for debugging.