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xmega A3U TOSC pins
Quote:Could you, please, confirm that the following configuration is correct? 16MHz - XTAL1/XTAL2 (PR1/PR0) 32.768kHz - TOSC1/TOSC2 (PE6/PE7) Atmel technical support confirmed...
Sunday, 9 June 2013 - 04:59
XMEGA External Oscillator Selection
Quote:Then if I select 10 ppm 8 MHz oscillator, will it have 40 ppm at 32 MHz after PLL ? Am I better off selecting 16 MHz ? It's best to use a crystal that is directly used by...
Sunday, 9 June 2013 - 04:51
Event System
I've always thought an interesting feature of the event system is increasing the clock prescaler divide ratio. Most peripherals have a limited range, but the event system can...
Tuesday, 4 June 2013 - 01:01
Causes of programming error
1) Can you read the fuses? This will verify if the interface from programmer to mcu is working properly. 2) Try reading out the program and use diff to compare. This will show if...
Tuesday, 4 June 2013 - 00:52
Internal ADC input offset voltage
For ADCs, absolute accuracy is always tricky. The problem with comparing the measured reference voltage using a super high accuracy calibrated voltmeter is that it is a DC/low...
Tuesday, 4 June 2013 - 00:43
Help with PWM frequency
Depending on if your application allows it, you could modulate between different OCR1A values. For example, if you want 92.4, then in a given period, half the time OCR1A is 160...
Monday, 3 June 2013 - 21:55
What is Port R ??
TOSC1 and TOSC2 are not on PR0 and PR1. Some places in the datasheets mention that, but in other places it shows TOSC1 and TOSC2 are on PORTE. In my case using the atxmega64a3u,...
Wednesday, 15 May 2013 - 13:39
Metal coil detector for food industry using ATmega32
Your description is very vague. Lots of things could be wrong: 1) Are you putting the output of the AD9832 directly on the coil? It probably won't be able to drive such a low...
Saturday, 4 May 2013 - 12:58
Xmega32E5 timer in "CTC" mode (closed)
Looks like the period TCC4_PER should be changed from 0xFFFF to the same value as TCC4_CCA? That way it should definitely reset when it hits the capture value.
Tuesday, 30 April 2013 - 01:43
XMega128A4U ADC Calibration
Absolute accuracy might be tough with the ADC pipeline architecture. This architecture is good for medium power, medium resolution, medium conversion rate. Best architecture of...
Friday, 26 April 2013 - 01:19
Where's the DFU bootloader?
I never found the source either. The package you point to has source code for including the bootloader in your project. I think I also read somewhere that atmel used iar to...
Thursday, 25 April 2013 - 10:06
Full Speed USB on XMega
There are many factors affecting the speed if you use CDC. Here are some: 1) CDC is a bulk class transfer which means data integrity is guaranteed, but promptness is not (it gets...
Thursday, 25 April 2013 - 10:03