Hello, I have hard times to understand what the datasheet is trying to interpret in timings for reset from different state of the AVR ATTiny13A. Particularly I am interested when the internal RC oscillator is used for clocking the chip. As I understood I can set up different delay when comes up from powered down mode. It ads additional 14 CK to the 6 CK normal start-up time + can set further 4ms or 64ms. What is not clear when is this delay added to the normal start-up time? Only at POR, or also when waking up from power down sleep mode? Also could not figure out from the datasheet the timing of waking up the MCU from idle mode? In addition to this grey cloud I could not find information of this 6 CK startup time? I guess ones the oscillator is up and stable then it counts to 6 and this is this this 6 CK startup time, but how long does it take to the oscillator circuit to be started up into a stable condition when this 6 CK starts counting? Especially regarding this to different thermal and power supply conditions? If you could point me to a link or which documentation shall I read on this subject, it would be much appreciated. Thanks, Tamas -- http://www.mcuhobby.com -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist