user65894: When I examine the datasheet for the Arduino Micro (couldn't find the Pro Micro on their site, btw) then I see some data pins annotated with a ~ character, and some are not.
For instance, D9 has a ~ annotation, D8 does not.
What does this annotation mean?


user4143: It means the pin can be a PWM output for use with analogWrite().

65894: <p>When I examine the datasheet for the Arduino Micro (couldn't find the Pro Micro on their site, btw) then I see some data pins annotated with a ~ character, and some are not.</p>

<p>For instance, D9 has a ~ annotation, D8 does not.</p>

<p>What does this annotation mean?</p>

<p><a href="https://i.stack.imgur.com/EFqLY.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/EFqLY.png" alt="pinout"></a></p>
 4143: <p>It means the pin can be a PWM output for use with <code>analogWrite()</code>.</p>
