> Anyway, the fact that the I/O pin i written in phase > 4 of the instruction and read in phase 1 of the next, > makes the issue worse, of cours. Adding a single NOP > actualy makes the time from the write to the read *5* > times longer (adding four cycles)... :-) Fun issues I'm glad not to have in AVR land :) One instruction, one cycle, (mostly). Phases?! We don't need no steenkin phases! -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist