User talk:Ipper

Fuse settings for Sanguinololu

Hi. Thanks for your comments on the Sanguinololu page. I have checked what you wrote there, as you requested. My observations are as follows (also noted on the page): The lfuse setting controls the oscillator, not hfuse. The only functional difference between your setting D6 (nominally for ceramic resonator) and the Gen7 setting F7 (nominally for crystal oscillator) is that D6 only allows 258 clock cycles for the resonator to stabilise on start-up, while F7 allows 16000 clock cycles. Furthermore, note that the ATmega data sheet specifies that D6 "should only be used when not operating close to the maximum frequency of the device, and only if frequency stability at start-up is not important for the application". In all cases (ceramic and crystal), F7 should be at least as reliable, the only downside being a ~1 ms delay in start-up time. For simplicity, I would suggest using the Gen7 settings (which I have confirmed working) in all cases. Given the large degree of confusion surrounding fuse settings, I will edit the page to remove all the conflicting information and settle on the Gen7 settings in a few days unless I see an objection. I welcome any further comments you may have. --Scwimbush (talk) 01:49, 5 February 2016 (PST)

==

I'd just like to confirm we are talking about a Sanguinololu 1.3a and Atmega 1284p? Thanks for checking!