Type in the full discussion title or a part of it.
Discussion Title Created date
External 32KHz oscillator takes 500ms to start
I noticed something odd when trying to wake up from Power Save mode with the CPU clock set to use the external 32.768KHz crystal on the TOSC pins. I use an async pin edge...
Friday, 21 June 2013 - 09:43
Dataflash lies! Page erase fails to set the busy bit
My Dataflash chip is lying to me! I have an AT45DB081D chip and am sending page erase (0x81) commands to it. The datasheet says that after the page erase command the busy bit in...
Thursday, 20 June 2013 - 11:07
Maximum interrupt latency
Hi, me again :-) I have been trying to work out a worst case scenario for interrupt latency on an XMEGA. According to the manual: 1. Trigger time, 0 to 1 cycles 2. Finish...
Tuesday, 4 June 2013 - 08:14
Internal ADC input offset voltage
I have noticed that the internal ADC inputs (bandgap, SCALEDVCC) have a fairly large offset error, typically in the order of 60-70mV. Why is this? External measurements have an...
Monday, 3 June 2013 - 09:00
Hide annoying dependencies section from solution explorer?
Simple question: is it possible to hide that annoying dependencies section from the solution explorer? It seems to open itself up at random and is huge. It can be removed, can't...
Thursday, 16 May 2013 - 07:53
CRC error during installation of AS6.1
Hi. See the attached file, I get a CRC error during installation of AS6.1. I re-downloaded the installer from Atmel's site and got the same error on the same file. Installed on a...
Thursday, 2 May 2013 - 10:29
Setting the external clock source at runtime with ASF
Hi. I am trying to get the ASF to switch between a 16MHz crystal connected to the XOSC pins and a 32KHz watch crystal connected to the TOSC pins. If I hit the registers directly...
Wednesday, 1 May 2013 - 09:20
USB and SPI on the same port
I want to make use of both USB and SPI on the same port. I only need MOSI on the SPI port (no MISO, SCLK or SS) which is on pin 5. Pins 6 and 7 are used by USB. Has anyone tried...
Monday, 18 February 2013 - 16:53
ADC input sources with 2 ADCs
I'm looking for some clarification on the XMEGA manual. In the A3U and A1U datasheets in section 28.3, page 357, it says: " In devices with two ADCs, PORTA pins can be input to...
Monday, 11 February 2013 - 14:09
Maximum total current for an XMEGA
Hi. I know variations of this question have been asked before, but exactly how much current can I expect to source or sink with an XMEGA in total? The A1U datasheet says maximum...
Thursday, 24 January 2013 - 12:03
DFLL from external clock on A3U
Hi. In the A3U manual section 7.7 it says that the following may be selected as the reference clock for DFLL: - 32KHz internal oscillator - 32Khz crystal on TOSC pins - External...
Wednesday, 23 January 2013 - 15:03
Unable to read fuses with NVM controller
Hi. I am having trouble reading fuse values on an XMEGA128A3U and 128D3. When I read the fuses I get 0x00 for fuses 0, 1 and 2. Fuses 4 and 5 give me the correct values. I have...
Friday, 4 January 2013 - 15:31

Pages