You might want to improve your probing technique, then. :)
GPIO's usually looks quite squarey if you don't introduce parasitic reactances into the circuit with your test setup.
GPIO's usually looks quite squarey if you don't introduce parasitic reactances into the circuit with your test setup.
A spectrum analyser has probes!?!? This might be where I am going wrong... But the bench scope is largely in agreement about the distinct phases of a cycle at RF freq.