I have a data logger project, and wherever possible I have been replaced 'delay' statements with 15ms sleeps using the rocket scream library that was modified by one of the forum members here to support the 1284p. This works well for anything 15ms or longer, but I still have a few 1 to 5ms delays in the scrip for things like eeprom page writes, analog reads, etc.
Is there any way to put these units into low power/sleep modes for times as short as one millisecond?