XMEGA A4 vs A4U

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Just a container to indicate the difference between these two families. Please add any other difference, I'm sure I will be missing some.

Features added to the A4U:
1) USB Module
2) CRC Module
3) 16 bit timers can be split in 2 8 bit timers

Other notes:
1) Greatly reduced errata on actual devices datasheets, of particular interest is the ADC.

Is the A4 a subset of the A4U?

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Quote:

Is the A4 a subset of the A4U?


See this:

https://www.avrfreaks.net/index.p...

it's more like the "U"s are "Xmega2"

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Gabriel,

I'll be sending my Xprotolabs back for "refurbishing" :wink:

JC

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Here's another new feature of the U series:

Quote:
Other digital peripherals, such as USART, SPI, and timer/counters, can be remapped to selectable pin locations in order to optimize pin-out versus
application needs. Other digital peripherals, such as USART, SPI, and timer/counters, can be remapped to selectable pin locations in order to optimize pin-out versus application needs.
(doc8331.pdf)

Very handy if you wanted to use DMA SPI in Master Mode - no need to physically swap pins anymore if your device is wired to the SPI (as opposed to the UART) :)

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DocJC wrote:
I'll be sending my Xprotolabs back for "refurbishing" :wink:JC
You caught me!, I am working on my next hardware rev... But I still have to wait until the new parts are available.

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Just what I needed, a migrating document, which also lists the differences: http://www.atmel.com/dyn/resources/prod_documents/doc8417.pdf

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Last Edited: Thu. Nov 17, 2011 - 07:01 AM
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- Hires extension has resolution of ~4ns (1/256MHz) !!
- Each DAC has TWO independent and continuous-time channels
- ADC has internal VCC/2 reference option and divide by two gain setting
- AC has two constant current sources
- 4 new instructions: XCH, LAS, LAC, LAT
- ...

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I see Studio 5 will handle these, but what about Studio 4.18 SP2 ... ? I can't find anything about this... :?

1) Studio 4.18 build 716 (SP3)
2) WinAvr 20100110
3) PN, all on Doze XP... For Now
A) Avr Dragon ver. 1
B) Avr MKII ISP, 2009 model
C) MKII JTAGICE ver. 1

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Quote:

but what about Studio 4.18 SP2 ...

Since that was released before the chips were a glint in Atmel's eye it would have taken nothing short of divine intervention!

4.19 appears to know of some x-u chips

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Thanks Clawson and I know confirmed that ATXMEGA32A4U is 1 of them . Atmel's search function's not acting right from the main page . It just goes to a page that's mostly 'white space' and the links there don't go anywhere . :cry:

1) Studio 4.18 build 716 (SP3)
2) WinAvr 20100110
3) PN, all on Doze XP... For Now
A) Avr Dragon ver. 1
B) Avr MKII ISP, 2009 model
C) MKII JTAGICE ver. 1

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Quote:

4.19 appears to know of some x-u chips

Yes, the new XMEGA USB devices are supported in AVRStudio 4.19.

- Dean :twisted:

Make Atmel Studio better with my free extensions. Open source and feedback welcome!