Arduino Reference - DelayMicroseconds

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## delayMicroseconds()

#### Description

Pauses the program for the amount of time (in microseconds) specified as parameter. There are a thousand microseconds in a millisecond, and a million microseconds in a second.

Currently, the largest value that will produce an accurate delay is 16383. This could change in future Arduino releases. For delays longer than a few thousand microseconds, you should use delay() instead.

#### Syntax

delayMicroseconds(us)

#### Parameters

us: the number of microseconds to pause (unsigned int)

#### Returns

None

#### Example

    int outPin = 8;                 // digital pin 8

    void setup()
    {
      pinMode(outPin, OUTPUT);      // sets the digital pin as output
    }

    void loop()
    {
      digitalWrite(outPin, HIGH);   // sets the pin on
      delayMicroseconds(50);        // pauses for 50 microseconds
      digitalWrite(outPin, LOW);    // sets the pin off
      delayMicroseconds(50);        // pauses for 50 microseconds
    }

configures pin number 8 to work as an output pin. It sends a train of pulses with 100 microseconds period.

#### Caveats and Known Issues

This function works very accurately in the range 3 microseconds and up. We cannot assure that delayMicroseconds will perform precisely for smaller delay-times.

As of Arduino 0018, delayMicroseconds() no longer disables interrupts.

#### See also

- millis()
- micros()
- delay()

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