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Low ESR caps
I'm working on a new Xmega design I'll be running off a 5V supply, so I figured I'd put a 3.3V regulator by the CPU to provide its Vcc. All the parts I'm finding, though, require...
Wednesday, 1 June 2011 - 05:31
Solder pad footprints (specifically TQFP44)
Can someone point me to Atmel's official repository of these? I can find other TQFP44s online, and they're pretty consistent, but I'd feel better laying out a new xmega A4 board...
Wednesday, 25 May 2011 - 23:20
32MHz internal oscillator experiences
I'm evaluating Xmega for a new project and really like the idea of a fast (32MHz) internal oscillator. If I can get by with +/- 1.5% accuracy (per the datasheet), are there any...
Saturday, 21 May 2011 - 18:27
A4 availability
I'm evaluating Xmega for a new project and the A4 variants seem best suited for my needs. On Mouser and Digikey, however, these don't seem well-represented (the 128A4 isn't...
Saturday, 21 May 2011 - 18:22
Timing issue on ATmega328
I'm running the 328 at 20 MHz and use the following code to drive Timer0 to generate an overflow every 1 msec., so it should produce a 500 kHz square wave (low for 1 msec., hi for...
Friday, 20 May 2011 - 21:23
I'm evaluating Xmega for a new project and was wondering what the pros and cons of these two debug interfaces were (having only used JTAG and debugWire before). PDI looks...
Wednesday, 18 May 2011 - 17:51
Interfacing Xmega with 5V logic
Can someone point me to a discussion of the issues and techniques? Thanks.
Tuesday, 17 May 2011 - 15:46
Unable to write to UDR1 on ATMega2561
I'm trying to write several values to UDR1 to send out the USART1 on an ATMega2561 using JTAG ICE MkII and AVR Studio 4.18, but they never show up in the register, even if I...
Thursday, 28 April 2011 - 03:30
Odd simulator behavior (AVR Studio) [solved]
I'm posting here because I'm guessing this is a source code problem. Furthermore, even though I use ICCAVR, I'm also guessing this is a generic C problem. I'm not exactly a newb...
Wednesday, 27 April 2011 - 21:10
AVRISP Mk II, JTAG ICE Mk II, and Windows 7, 64-bit
I'm thinking of getting a new PC based on the 64-bit version of Windows 7. Has anyone had any luck getting AVRISP Mk II, JTAG ICE Mk II, and AVR Studio, for that matter, running...
Saturday, 15 May 2010 - 20:51
Skipping over an instruction while using JTAGICE mkII
Is this possible, or do I have to comment it out in the source, recompile, and reload the .cof? Thanks.
Sunday, 28 June 2009 - 04:49
Why does running a timer produce erratic input?
I have a DC motor turning a disc at around 5 rpm. I use a hall effect gear tooth sensor to monitor its position. Periodically, based on the sensor input, my ATMega2561 stops the...
Thursday, 25 June 2009 - 00:14