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Can't connect to JTAGICE3
I have been using the JTAGICE3 for several years, and have two of them.   After using them with no problems, I suddenly cannot connect to either one!   In particular, I...
Thursday, 21 January 2016 - 04:03
Fastest practical USB with XMega?
What is a realistic upper limit for USB transfers using an Xmega to a desktop PC?   There is a video from Atmel saying that it is 8.7 Mbps, but it is unclear how "real world...
Monday, 7 September 2015 - 17:16
DFLL enable sometimes doesn't work
Why would the following DFFL enable code work when single-stepping, but not in run mode? DFLLRC32M.CTRL = DFLL_ENABLE_bm; I have a design using the Xmega 32A4U, and enable the...
Monday, 3 March 2014 - 19:46
Transients in ADC values [SOLVED]
I am seeing strange, random spikes in the data I am collecting. I am using the ADC in a XMega 32A4U in differential mode with gain, sampling at about 240 Hz. Between samples, I...
Tuesday, 12 November 2013 - 23:27
Pin voltage limits when powered down?
Do the absolute maximum pin voltages (Vcc + 0.5V)apply even when the chip is powered down? That is, do I risk damage if 3 V is applied to one of the I/O pins before power is...
Tuesday, 1 October 2013 - 21:54
Frequent hangs in debugger
I am using Atmel Studio 6.0 build 1996 service pack 2. About once every half hour when starting debugging using JTAGIC3 I get an error: "An ongoing operation is taking longer than...
Sunday, 9 June 2013 - 03:31
Enable Brown out detector in software?
Is it possible to enable (and disable) the brown out detector in software? I would like to avoid the power hit when running normally, but use it when doing a controlled, gradual,...
Wednesday, 17 April 2013 - 00:14
DFLL - COMP0 Compare register questions?
I am going to try the DFLL to calibrate the 32M RC oscillator. I am trying to figure out the difference between the 8 bit COMP0 register, and the 16 bit COMP1/COMP2 register....
Friday, 5 April 2013 - 05:20
Code fails with uncommenting line later in code
I have a very strange problem in Atmel Studio 6. I am trying to debug a problem on an XMega32A4. I have a breakpoint at the beginning of a routine, at "flashInit()". When I...
Wednesday, 30 January 2013 - 23:45
Overvoltage on pin when "disconnected"
Do the maximum voltages on the I/O pins (Vcc + 0.5 V) apply even when the pin is internally "disconnected", and the voltage is connected through a 200K resistor? It seems that if...
Tuesday, 17 April 2012 - 20:06
Strange 32.768kHz crystal results
I am using an xmega 32A4 in my design, with an external 32.768k crystal as a clock. On the previous board revision, I wrote some code to test the clock frequency, toggling a pin...
Wednesday, 8 February 2012 - 01:56
ADC: What value for AREF when diff input with gain?
I am using an XMega 32A4, and using differential input via PA0 and PA4. PA4 is set at 1/2 my analog max voltage, AVCC, and the value of PA0 can swing from GND to AVCC. What...
Friday, 11 November 2011 - 20:13

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