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UC3 DAC slew rate - what is it?
Is there a slew rate associated with the UC3(C) DAC? I know the sample rate is 1MSPS to a continuous channel, but I don't think the DAC can go from Vout(min) to Vout(max) before...
Wednesday, 12 December 2012 - 21:42
UC3C PWM skipping a value after duty cycle = 0
A picture is worth a thousand words in this situation I think. Anytime the duty cycle of my PWM output is 0, the following value is output as N - 1 instead of N. For example:...
Sunday, 9 December 2012 - 02:16
UC3C: memory to PWM - PDCA ring buffer not working
I'm trying to generate a sine wave using the PWM peripheral and a low pass filter. Everything works fine while using PDCA with interrupts, but I want to do this with zero...
Saturday, 8 December 2012 - 14:21
UC3C SCIF unlock sequence not working
I'm trying to turn off the internal 3.3V regulator in a UC3C0512C because I'm supplying 3.3V externally. When I try to unlock the VREGCTRL register by writing the key and address...
Sunday, 2 December 2012 - 17:56
Upgraded AS6 to 1996, ASF stuck on 2.11
I upgraded to 1996, but now the versions of ASF in the project properties dropdown are not selectable. I can see 2.11.1, 3.30, 3.40, and 3.50, but only 2.11.1 will actually...
Wednesday, 21 November 2012 - 06:03
Interrupt vector unhandled code exception
UC3C0512C I'm in the process of turning on features on a new board I made for a client. The buttons work as expected electrically, but the program is doing something unexpected...
Wednesday, 21 November 2012 - 01:59
shift xmega dac signal to start from 0V
Unfortunately, the DAC on the Xmega A4U only goes down to 0.15V. That plus the list of other issues makes it basically useless to me, but I realized if I could get it down to 0V (...
Wednesday, 5 September 2012 - 02:58
FETs with built-in pullup/pulldown resistors
Does anyone know of a FET with a built-in pullup/pulldown resistor other than the LMN200? It works for my application, but I'm looking to buy 10k at a time and I was hoping there...
Monday, 27 August 2012 - 00:44
Electret microphone connected to XmegaA4U ADC w/ gain
Is there any information available regarding an electret microphone connected directly to an Xmega? Usually I use an opamp with 50-60x gain, but I'd like to be able to bypass it...
Wednesday, 15 August 2012 - 13:59
SDRAMC and SMC at the same time?
The AT32UC3C-EK development kit shows a TFT LCD connected via SMC and a 256 Mbit SDRAM connected via SDRAMC. Since they both need EBI access, I thought I'd dig around in the ASF...
Saturday, 4 February 2012 - 17:41
JTAGICE MKII Broken & Fixed, google fodder post
I somehow broke my JTAGICE MKII last week. Initially I decided it wasn't worth my time to try to fix, but after looking at the front end interface, it seemed simple enough. I...
Wednesday, 4 January 2012 - 19:15
AVRDude FT232R via D2XX instead of a COM port
Does anyone know if AVRDude can communicate with FTDI UART bridges via native USB instead of using a VCP? I tried asking on the AVRDude mailing list and it has been over a week,...
Saturday, 31 December 2011 - 21:20

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