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megaAVR 0-series
ka7ehk wrote: 2) EVSYS? Can someone describe the broad behavior of this thing? I see a block diagram with gates and flipflops but that does not give me any sense of what it really...
Wednesday, 4 December 2019 - 21:01
megaAVR 0-series
Indeed, but it's very handy for picking up those spare cycles and doesn't have the overhead of an interrupt (enter, load pointers, move data, check end conditions, leave).
Thursday, 21 November 2019 - 08:55
megaAVR 0-series
Lovely parts. The only thing I'd add is some DMA, even a single channel. It's so handy when you need to pump a load of data over a serial bus with minimal overhead.
Wednesday, 20 November 2019 - 11:10
ATTINY1627/26/25/24 availability
Oh, thanks! That looks ideal.   I didn't know they were doing xMEGA... MEGAx... XMEGAMEGA or whatever this is, but I'm glad they have 5V capable parts now.
Wednesday, 20 November 2019 - 10:56
XMEGA DFLL USBSOF needs manual COMP tuning - why?
steve17 wrote: I doubt there would be any more problems with the USB3 ports than the USB2 ports.  I would think USB3 ports must obey USB2 rules when a USB2 device is plugged...
Thursday, 13 June 2019 - 08:33
XMEGA DFLL USBSOF needs manual COMP tuning - why?
Oh, I should clarify, I was not talking about wake-up from sleep, I was talking about the initial plug-in and power up of a bus-powered device with a USB 3.0 port.
Wednesday, 12 June 2019 - 10:21
XMEGA DFLL USBSOF needs manual COMP tuning - why?
steve17 wrote:Actually I find that it is unnecessary to even think about putting the correct value into CALA.  This could be a little more pain than it is worth.  I...
Wednesday, 12 June 2019 - 08:41
Fine tuning a crystal in code
sparrow2 wrote:There is no need to calibrate just a need to know the speed. If I have a board with the AVR, a 5V regulator and 32768Hz crystal and put it in a climate chamber...
Monday, 27 May 2019 - 13:59
Fine tuning a crystal in code
I did try this but it's not great.   First you have to calibrate the crystal. That is tricky because you need to measure the error and the temperature of the crystal...
Friday, 24 May 2019 - 12:36
Fine tuning a crystal in code
I was impressed by the "Wave Ceptor" watches they make. Some are full 6 band, i.e. world-wide coverage of low frequency time codes.   About accuracy, I think millisecond...
Friday, 24 May 2019 - 09:42
Fine tuning a crystal in code
Who-me wrote: mojo-chan wrote: I build something like that years ago. I had an app for a Nokia with Symbian OS that would flash the screen. A photodiode on the clock could read...
Thursday, 23 May 2019 - 07:45
Fine tuning a crystal in code
meslomp wrote:note that you indeed have a 11 minutes change in a year, but you will be adjusting your clock 2 times a year for daylight savings time and back.   I've just...
Wednesday, 22 May 2019 - 09:05

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