#define dataPin 4
#define outPin 6
#define MICROSECOND_NOPS "nop\nnop\nnop\nnop\nnop\nnop\nnop\nnop\nnop\nnop\nnop\nnop\nnop\nnop\nnop\nnop\n"   //Assembly for 1/6 microsecond using clock pulses

void setup()

{
  pinMode(outPin, OUTPUT);
  pinMode(dataPin, INPUT);
  attachInterrupt(digitalPinToInterrupt(dataPin), falling_edge, FALLING); //attach interrupt function
}

void loop()
{
//empty
}

void falling_edge()
{
  asm volatile( MICROSECOND_NOPS MICROSECOND_NOPS
                MICROSECOND_NOPS MICROSECOND_NOPS
                MICROSECOND_NOPS MICROSECOND_NOPS
                MICROSECOND_NOPS MICROSECOND_NOPS
                MICROSECOND_NOPS MICROSECOND_NOPS
                MICROSECOND_NOPS MICROSECOND_NOPS );
  digitalReadFast(dataPin)?
  digitalWriteFast(outPin, HIGH):
  digitalWriteFast(outPin, LOW);
}