Bob Paddock wrote: > On Sat, Oct 2, 2010 at 8:24 AM, Simone Zamboni <simo.zamb...@alice.it> wrote: > > > By the way, a note for me: Bob, how much time does the XMEGA take to > > verify all the code (roughly)? Reading all the flash data seems to take > > a few seconds. > > I will have to measure the time. I'd guess a little less than two > seconds with my current code, at 8 MHz. > I only run the CRC when the PORF bit (Power Applied) is set, rather > than at all resets. > I have to meet some regulations that require the system to be "fully > operational in under one second". > > In the XMega you could switch to the 32 MHz Osc. to run the start up > code, I don't for power reasons. >
Well, i made some brief tests and but didn't find big differences in reading data from flash at different clock speed: it seems that the limit is about the NVM controller not the instructions the MCU has to execute. I can be wrong because I didn't test this very deeply so further investigation may be needed. _______________________________________________ AVR-libc-dev mailing list AVR-libc-dev@nongnu.org http://lists.nongnu.org/mailman/listinfo/avr-libc-dev
