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Is there a delay function available that does not use millis() which itself makes use of a timer? Does not need to be hyper-exact.

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delayMicroseconds(1000);// maximum delay is 65535 uS

or 

#include <util/delay.h>
_delay_ms(1);
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    delayMicroseconds() does not accept long int (32-bits) but only unsigned int (16-bits), hence the maximum you can pass it is 65535. Commented Aug 3, 2014 at 13:03

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