My wife bought me a Radio Shack version of the Arduino Micro for Valentine's Day ( a woman who really knows my heart). When I saw its small size and ready adaptability to solder right to a circuit board, I decided to replace an Uno in my current project with the Micro. Of course, there are differences in interrupts, timers, etc. and I figured those out to the extent I needed to migrate my software..
But what is weird to me that digital pin 3 wont accept a 100 Hz blink routine (according to oscilloscope), while pin 13 does. The software used was the same, except for renaming the pin from 3 to 13. I had some problem with pin 5 also, which didn't seem to want to function as a digital output. (And yes, I established output with pinMode()).
Of course, various pins have multiple functions, but with the Uno, every digital pin is first and foremost a digital pin. So I'm wondering if the Micro requires some additional instructions to establish the function of some pins.
Thanks in advance for any insights.