I have an Arduino UNO which is connected to an KLZ25 board, the Arduino sends an 1MHz Clock at Pin 9 and now I should write the PDM-Data with 1 Mhz at pin 8. But i don't know how to write with such a speed, because if I write in the Loop:

loop{
digitalWrite(1); 
digitalWrite(0);
}

I get only a frequency of 36Khz, I know it depends on the count of commands in the loop, but I don't know how to write with a certain frequency in my case 1Mhz.

Does anybody know how to write PDM-Data with a 1MHz frequency to an output pin ?

I have an Arduino UNO which is connected to an KLZ25 board, the Arduino sends an 1MHz Clock at Pin 9 and now I should write the PDM-Data with 1 Mhz at pin 8. But i don't know how to write with such a speed, because if I write in the Loop:

loop{
digitalWrite(1); 
digitalWrite(0);
}

I get only a frequency of 36Khz, I know it depends on the count of commands in the loop, but I don't know how to write with a certain frequency in my case 1Mhz.

I get the PDM-Data (pulse density modulation) in form of 1 and 0 from a python script on a Host-PC and now I want to stream the Data with 1MHz to an other developer board which makes further calculation with the PDM-Data. I store the PDM-Data in queues because I have not enough memory to store the whole Data.

Does anybody know how to write PDM-Data with a 1MHz frequency to an output pin ?