user50378: What is the least value of time that I could measure(count) using micros()?

user13432: 
What is the least value of time that I could measure(count) using micro() in Arduino board?

The answer is 64 clock cycles or 4 us @ 16 MHz. Please see the Arduino AVR core[1] for more details. 
Cheers!
Ref. [1] https://github.com/arduino/ArduinoCore-avr/blob/master/cores/arduino/wiring.c#L25

50378: <p>What is the least value of time that I could measure(count) using <code>micros()</code>?</p>
 13432: <blockquote>
  <p>What is the least value of time that I could measure(count) using micro() in Arduino board?</p>
</blockquote>

<p>The answer is 64 clock cycles or 4 us @ 16 MHz. Please see the Arduino AVR core[1] for more details. </p>

<p>Cheers!</p>

<p>Ref. [1] <a href="https://github.com/arduino/ArduinoCore-avr/blob/master/cores/arduino/wiring.c#L25" rel="nofollow noreferrer">https://github.com/arduino/ArduinoCore-avr/blob/master/cores/arduino/wiring.c#L25</a></p>
