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Groups > comp.arch.embedded > #13351

Re: AREF bypass capacitance on ATMega2560?

From Joerg <invalid@invalid.invalid>
Newsgroups sci.electronics.design, comp.arch.embedded
Subject Re: AREF bypass capacitance on ATMega2560?
Date 2013-09-07 10:59 -0700
Organization Consultant
Message-ID <b917s1F2k40U1@mid.individual.net> (permalink)
References (7 earlier) <l0dggl$i7r$1@dont-email.me> <b8v5o1Fk9f7U1@mid.individual.net> <l0e8cm$2i7$1@dont-email.me> <b90u09Fj0uU1@mid.individual.net> <l0fm8f$uts$1@dont-email.me>

Cross-posted to 2 groups.

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rickman wrote:
> On 9/7/2013 11:10 AM, Joerg wrote:
>> rickman wrote:
>>> On 9/6/2013 7:10 PM, Joerg wrote:
>>>>
>>>> That is often the problem. Sometimes a buck fifty is the pain
>>>> threshold.
>>>> Not in this ATMega case, the 2560 is very expensive but comes with lots
>>>> of ADC and analog muxes and all that. Things that will cost extra
>>>> with a
>>>> FPGA solution and eat real estate.
>>>>
>>>>
>>>>    For $3 however, you can get a
>>>>> chip large enough for a CPU (with math) and room for your special
>>>>> logic.
>>>>>
>>>>
>>>> For $3 I can get a big DSP.
>>>
>>> What "big" DSP can you get for $3? ...
>>
>>
>> For example, this:
>>
>> http://www.ti.com/lit/ds/symlink/tms320c5535.pdf
> 
> I don't see it for $3.  Did you get a quote for your project?  TI says
> it is $5 to $8 at qty 1k depending on the flavor.  You still need to add
> Flash.
> 

1k qty is $3.67 at Digikey:

http://www.digikey.com/product-detail/en/TMS320C5532AZHH10/296-32741-ND/2749713

$3.02 with 12wks leadtime at Arrow:

http://components.arrow.com/part/detail/51425505S8988412N7713?region=na

ROM is included.


> 
>>>                           ... It has been a while since I looked
>>> hard at DSP chips, but I don't recall any I would call remotely "big"
>>> for $3.  The TI chips that would be "big" are the TMS6xxx line which
>>> start somewhere around $20 the last time I looked and that requires all
>>> memory and I/O to be separate.  The smaller DSP chips that you can get
>>> for the $3 range are not "big" in any sense and only a very few of them
>>> include Flash memory.  So you still need another chip.
>>>
>>
>> It has tons of memory on board.
> 
> Yes, and many FPGAs have "tons" of memory on board although not for
> $3... but then this isn't a $3 part either...
> 

It is a $3 part. See above.

> 
>>> Even a "small" FPGA can run rings around a DSP when it comes to
>>> performance.  Usually "big" in DSPs means fast and when you want really
>>> fast DSP you use an FPGA with all the parallelism you can handle.  DSPs
>>> can't touch FPGAs for speed, even with low power.
>>>
>>
>> Most of the really powerful FPGA that I connected to or had to review
>> designs with them in there were painfully expensive.
> 
> Because you were looking at FPGAs that were "painfully" large I'm sure.
>  How many pins, 256, 400+...?  20,000 LUTs, 40,000 LUTs?
> 

Sure, that's why I wrote "powerful". The less powerful ones have never
impressed me much but I have to admit that I haven't looked the last
five years. So, tell us, which FPGA can fully replace the above DSP for
three bucks and where could one buy it off the shelf?


> 
>>>> It's the same with myself. For many assigments I could as well live on
>>>> East Rarotonga. But not for EMC or noise fixing jobs with larger
>>>> installations.
>>>
>>> I'm confused.  Are you saying that on most jobs you don't care where the
>>> programmer lives and works? ...
>>
>>
>> Yes, on most but _not_ all. That's key.
> 
> So you could use FPGA instead of an MCU on most of your designs?  I'm
> still confused.  Are you saying if you can't use a part on all of your
> designs you don't want to use it on any?
> 

No, what I am saying is the it doesn't matter much which parts I use (my
clients decide that anyhow) but that finding a programmer locally can be
important. Some projects will not really come off the ground if the
programmer isn't local. Or it can take forever.

> 
>>>                        ...  I think that is what you said, but it
>>> sounds like you are trying to disagree with me.
>>>
>>
>> I disagree with the statement "it doesn't matter where the worker is".
>> Because sometimes (not always) it does matter. And when it does, close
>> proximity is very important. Then you need to literally work
>> side-by-side. Done it many times.
>>
>> Our local SW guy sold his horse ranch and moved out of California. Only
>> to Reno which is under 2h drive but that's already a bit far. And in
>> winter you might not get through the pass or can't get back home.
> 
> I have done many jobs remotely and it has *never* been a problem.  If
> debugging is needed in the field, that is not the same thing as saying
> the developer has to be in the field.  You are welcome to disagree on this.
> 

I do disagree.


> I can only remember one time where I iterated through design changes in
> the field and that was actually a case where I could have done it all
> remotely, but I was pleasing the customer to be there.  Turns out he
> wasn't initializing the design right and it was hard to detect.
> 

Well, if you are standing next to a huge roaring engine and this, that
and the other subtle disturbance has to be ironed out it would be a
major problem if the programmer is three time zones away. You don't have
to believe me but that's how it is with some of my assignments.

Just like EMC jobs on large gear can simply not be done remotely. Which
is why I bought the Signalhound analyzer (fits into carry-on).


> One big advantage to FPGAs is the ability to simulate at a low level. it
> is very easy to emulate the I/O in an HDL simulation.  I don't know how
> they do that with MCUs, but in the FPGA world I've never had a problem.
> 

That is undoubtedly true. Plus probably less in errata headaches.

[...]


>>> I've used schematic based tools and both VHDL and Verilog.  I've worked
>>> with the vendor's tools and third party tools including the NeoCAD tools
>>> which became Xilinx tools when Xilinx bought them.
>>>
>>> If anyone tells you they only know one brand of FPGA you are talking to
>>> an FPGA weenie.  I find MCUs to vary a *great* deal more than FPGAs in
>>> terms of usage.  MCUs need all sorts of start up code and peripheral
>>> drivers, clock control, etc, etc, etc.  FPGAs not so much.  They mostly
>>> have the same features and most of that can be inferred from the HDL so
>>> you never need to look too hard under the hood.
>>>
>>> In short, there is a lot of FUD about FPGAs.  Talk to someone who
>>> doesn't buy into the FUD.
>>>
>>
>> Yeah, maybe next time I need major logic we should talk. But better not
>> about politics :-)
> 
> Yeah...  Even if you need minor logic let's talk.  I find the real
> advantage to FPGAs is in the fact that I can do almost *anything* in
> one.  I don't need to add stuff unless it is very application specific
> like the CD quality CODEC on my current production board.  I could get
> CD quality from an FPGA design, but it wouldn't be worth the work to
> save a $3 part.
> 

So far the next project on the books that will contain logic is 2nd half
of next year. It will need a 16-bit audio codec as well but we can use
an external chip for that, PCM29xx series et cetera. Would (probably)
even keep it external with a uC because the 16-bit ADCs on those aren't
very quiet.

> 
>>>> Things quickly unravel when you start relying on real hardware that is
>>>> on uC but not on FPGA. Comparators, ADCs, analog muxes, for example.
>>>
>>> If you really need it all on a single chip, then yes, you won't find
>>> that on so many FPGAs although Microsemi has their Fusion line with
>>> analog.  My cash cow uses a single FPGA and a stereo CODEC.  That was
>>> smaller than any MCU design because the MCU would still require the
>>> CODEC (CD quality) and some of the control logic and interface could not
>>> be done with any conventional MCU.  I had to vary the speed of the CODEC
>>> clock via an ADPLL to synchronize it with an incoming data stream.  I
>>> don't know how to do that with an MCU and no logic.  But I can do it all
>>> with FPGA logic and no MCU.
>>>
>>
>> Hmm, I was looking at audio interfacing just yesterday because I am
>> going to need that on one new project. There's plenty out there that
>> should be directly adressable via MCU. For me it's probably going to be
>> something from the PCM290x series but there's also SPI variants and so
>> on.
>>
>> Anyhow, I am also going to need ADC and comparator, including muxes for
>> them, so this one will likely be a uC case again because otherwise all
>> this has to be added externally.
> 
> You do know that it is not hard to add an ADC to an FPGA?  No need for a
> mux if all the inputs can be connected to separate pins.  It all depends
> on the resolution you need.  8 bits is easy, 16 bits - not so easy.
> 

Mine are never less than 12-bit, often 16-bit.

> 
>>>> Last week I reviewed a design with some larger FPGA on there. What I
>>>> found fairly disgusting was how much they had to be babied with the
>>>> power sequencing. uCs don't have that problem.
>>>
>>> If you want to work with the wrong device, then you will find it hard to
>>> work with.  There are still single voltage devices on the market.  If
>>> this was an old design, most likely it was a Spartan 3 or similar era
>>> device when they (for still unknown reasons) used three, yes, count
>>> them, *three* voltages on the FPGA.  The 2.5 volt aux supply was there
>>> solely for the configuration interface which was normally to a 3.3 volt
>>> device!  Only from Xilinx...
>>>
>>> If this was a new device, then I guess they picked one based on
>>> something other than ease of use, eh?  Don't assume all FPGAs are the
>>> same.
>>>
>>
>> Well, this guy is a real expert on high-end FPGA and the project
>> requires stuff with tons of horsepower.
> 
> That's fine, just don't judge all FPGAs by the ones you have seen.  If
> the only MCU you had worked with were ARM 11s using 3 Watts and running
> a cell phone down in 8 hours, would you think the PIC MCUs were the same?
> 

Well, give us all here an example of a FPGA that can fully emulate a
TSM320 and costs $3 :-)

> 
>>> You are aware that there are Flash based FPGAs that don't require the
>>> external Flash chip, right?
>>>
>>
>> Same with uCs, since a very long time :-)
> 
> You are missing my point.
> 

I guess then I don't see your point. Flash is available on almost
everything nowadays.

-- 
Regards, Joerg

http://www.analogconsultants.com/

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Thread

AREF bypass capacitance on ATMega2560? Joerg <invalid@invalid.invalid> - 2013-08-19 13:14 -0700
  Re: AREF bypass capacitance on ATMega2560? John Devereux <john@devereux.me.uk> - 2013-08-20 20:16 +0100
  Re: AREF bypass capacitance on ATMega2560? Vladimir Vassilevsky <nospam@nowhere.com> - 2013-08-21 14:47 -0500
    Re: AREF bypass capacitance on ATMega2560? Jim Stewart <jstewart@jkmicro.com> - 2013-08-21 13:18 -0700
    Re: AREF bypass capacitance on ATMega2560? Joerg <invalid@invalid.invalid> - 2013-08-21 16:38 -0700
      Re: AREF bypass capacitance on ATMega2560? "Tim Williams" <tmoranwms@charter.net> - 2013-08-21 21:30 -0500
        Re: AREF bypass capacitance on ATMega2560? Joerg <invalid@invalid.invalid> - 2013-08-22 10:51 -0700
          Re: AREF bypass capacitance on ATMega2560? rickman <gnuarm@gmail.com> - 2013-09-06 16:26 -0400
            Re: AREF bypass capacitance on ATMega2560? Joerg <invalid@invalid.invalid> - 2013-09-06 13:33 -0700
              Re: AREF bypass capacitance on ATMega2560? rickman <gnuarm@gmail.com> - 2013-09-06 17:12 -0400
                Re: AREF bypass capacitance on ATMega2560? Joerg <invalid@invalid.invalid> - 2013-09-06 16:10 -0700
                Re: AREF bypass capacitance on ATMega2560? rickman <gnuarm@gmail.com> - 2013-09-06 23:59 -0400
                Re: AREF bypass capacitance on ATMega2560? Joerg <invalid@invalid.invalid> - 2013-09-07 08:10 -0700
                Re: AREF bypass capacitance on ATMega2560? rickman <gnuarm@gmail.com> - 2013-09-07 13:03 -0400
                Re: AREF bypass capacitance on ATMega2560? Joerg <invalid@invalid.invalid> - 2013-09-07 10:59 -0700
                Re: AREF bypass capacitance on ATMega2560? rickman <gnuarm@gmail.com> - 2013-09-07 14:54 -0400
                Re: AREF bypass capacitance on ATMega2560? Joerg <invalid@invalid.invalid> - 2013-09-07 12:39 -0700
                Re: AREF bypass capacitance on ATMega2560? rickman <gnuarm@gmail.com> - 2013-09-07 16:44 -0400
                Re: AREF bypass capacitance on ATMega2560? Joerg <invalid@invalid.invalid> - 2013-09-07 14:48 -0700
                Re: AREF bypass capacitance on ATMega2560? "Tim Williams" <tmoranwms@charter.net> - 2013-09-07 17:10 -0500
                Re: AREF bypass capacitance on ATMega2560? Joerg <invalid@invalid.invalid> - 2013-09-07 15:34 -0700
                Re: AREF bypass capacitance on ATMega2560? Stef <stef33d@yahooI-N-V-A-L-I-D.com.invalid> - 2013-09-08 00:57 +0200
                Re: AREF bypass capacitance on ATMega2560? Joerg <invalid@invalid.invalid> - 2013-09-07 16:56 -0700
                Re: AREF bypass capacitance on ATMega2560? Stef <stef33d@yahooI-N-V-A-L-I-D.com.invalid> - 2013-09-09 17:07 +0200
                Re: AREF bypass capacitance on ATMega2560? Joerg <invalid@invalid.invalid> - 2013-09-09 10:19 -0700
                Re: AREF bypass capacitance on ATMega2560? Paul <paul@pcserviceselectronics.co.uk> - 2013-09-09 20:27 +0100
                Re: AREF bypass capacitance on ATMega2560? Joerg <invalid@invalid.invalid> - 2013-09-09 12:55 -0700
                Re: AREF bypass capacitance on ATMega2560? Stef <stef33d@yahooI-N-V-A-L-I-D.com.invalid> - 2013-09-11 09:44 +0200
                Re: AREF bypass capacitance on ATMega2560? Joerg <invalid@invalid.invalid> - 2013-09-11 07:27 -0700
                Re: AREF bypass capacitance on ATMega2560? Stef <stef33d@yahooI-N-V-A-L-I-D.com.invalid> - 2013-09-13 12:42 +0200
                Re: AREF bypass capacitance on ATMega2560? Joerg <invalid@invalid.invalid> - 2013-09-14 11:56 -0700
                Re: AREF bypass capacitance on ATMega2560? rickman <gnuarm@gmail.com> - 2013-09-07 19:38 -0400
                Re: AREF bypass capacitance on ATMega2560? Paul Rubin <no.email@nospam.invalid> - 2013-09-07 17:39 -0700
                Re: AREF bypass capacitance on ATMega2560? rickman <gnuarm@gmail.com> - 2013-09-07 23:20 -0400
                Re: AREF bypass capacitance on ATMega2560? Joerg <invalid@invalid.invalid> - 2013-09-08 07:41 -0700
                Re: AREF bypass capacitance on ATMega2560? krw@attt.bizz - 2013-09-07 11:17 -0400
                Re: AREF bypass capacitance on ATMega2560? rickman <gnuarm@gmail.com> - 2013-09-07 13:23 -0400
                Re: AREF bypass capacitance on ATMega2560? krw@attt.bizz - 2013-09-08 11:19 -0400
                Re: AREF bypass capacitance on ATMega2560? rickman <gnuarm@gmail.com> - 2013-09-08 14:03 -0400
                Re: AREF bypass capacitance on ATMega2560? krw@attt.bizz - 2013-09-08 19:42 -0400
                Re: AREF bypass capacitance on ATMega2560? Paul Rubin <no.email@nospam.invalid> - 2013-09-08 17:18 -0700
                Re: AREF bypass capacitance on ATMega2560? krw@attt.bizz - 2013-09-09 13:13 -0400
                Re: AREF bypass capacitance on ATMega2560? rickman <gnuarm@gmail.com> - 2013-09-10 20:21 -0400
                Re: AREF bypass capacitance on ATMega2560? krw@attt.bizz - 2013-09-10 23:42 -0400
                Re: AREF bypass capacitance on ATMega2560? John Devereux <john@devereux.me.uk> - 2013-09-07 09:24 +0100
                Re: AREF bypass capacitance on ATMega2560? rickman <gnuarm@gmail.com> - 2013-09-07 10:00 -0400
                Re: AREF bypass capacitance on ATMega2560? krw@attt.bizz - 2013-09-07 11:32 -0400
                Re: AREF bypass capacitance on ATMega2560? rickman <gnuarm@gmail.com> - 2013-09-07 13:35 -0400
                Re: AREF bypass capacitance on ATMega2560? krw@attt.bizz - 2013-09-08 11:30 -0400
                Re: AREF bypass capacitance on ATMega2560? Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2013-09-09 09:56 -0400
                Re: AREF bypass capacitance on ATMega2560? Robert Wessel <robertwessel2@yahoo.com> - 2013-09-12 11:50 -0500
                Re: AREF bypass capacitance on ATMega2560? Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2013-09-12 15:06 -0400
                Re: AREF bypass capacitance on ATMega2560? Piotr Wyderski <peter.pan@neverland.mil> - 2013-09-12 14:57 +0200
                Re: AREF bypass capacitance on ATMega2560? rickman <gnuarm@gmail.com> - 2013-09-13 00:21 -0400
                Re: AREF bypass capacitance on ATMega2560? Piotr Wyderski <peter.pan@neverland.mil> - 2013-09-13 14:08 +0200
                Re: AREF bypass capacitance on ATMega2560? Tom Gardner <spamjunk@blueyonder.co.uk> - 2013-09-13 15:15 +0100
                Re: AREF bypass capacitance on ATMega2560? rickman <gnuarm@gmail.com> - 2013-09-13 11:46 -0400
                Re: AREF bypass capacitance on ATMega2560? Piotr Wyderski <peter.pan@neverland.mil> - 2013-09-13 18:43 +0200
                Re: AREF bypass capacitance on ATMega2560? Piotr Wyderski <peter.pan@neverland.mil> - 2013-09-13 19:14 +0200
                Re: AREF bypass capacitance on ATMega2560? rickman <gnuarm@gmail.com> - 2013-09-13 15:26 -0400
                Re: AREF bypass capacitance on ATMega2560? rickman <gnuarm@gmail.com> - 2013-09-13 15:24 -0400
                Re: AREF bypass capacitance on ATMega2560? David Brown <david.brown@removethis.hesbynett.no> - 2013-09-13 20:22 +0200
                Re: AREF bypass capacitance on ATMega2560? Joerg <invalid@invalid.invalid> - 2013-09-07 09:32 -0700
                Re: AREF bypass capacitance on ATMega2560? rickman <gnuarm@gmail.com> - 2013-09-07 13:44 -0400
                Re: AREF bypass capacitance on ATMega2560? Joerg <invalid@invalid.invalid> - 2013-09-07 12:46 -0700
                Re: AREF bypass capacitance on ATMega2560? Paul Rubin <no.email@nospam.invalid> - 2013-09-07 13:33 -0700
                Re: AREF bypass capacitance on ATMega2560? Joerg <invalid@invalid.invalid> - 2013-09-07 13:46 -0700
                Re: AREF bypass capacitance on ATMega2560? rickman <gnuarm@gmail.com> - 2013-09-07 17:05 -0400
                Re: AREF bypass capacitance on ATMega2560? Joerg <invalid@invalid.invalid> - 2013-09-07 15:23 -0700
                Re: AREF bypass capacitance on ATMega2560? rickman <gnuarm@gmail.com> - 2013-09-07 19:02 -0400
                Re: AREF bypass capacitance on ATMega2560? Joerg <invalid@invalid.invalid> - 2013-09-07 16:45 -0700
                Re: AREF bypass capacitance on ATMega2560? rickman <gnuarm@gmail.com> - 2013-09-07 23:16 -0400
                Re: AREF bypass capacitance on ATMega2560? Joerg <invalid@invalid.invalid> - 2013-09-08 08:05 -0700
                Re: AREF bypass capacitance on ATMega2560? rickman <gnuarm@gmail.com> - 2013-09-08 14:27 -0400
                Re: AREF bypass capacitance on ATMega2560? Joerg <invalid@invalid.invalid> - 2013-09-08 12:56 -0700
                Re: AREF bypass capacitance on ATMega2560? rickman <gnuarm@gmail.com> - 2013-09-10 23:07 -0400
                Re: AREF bypass capacitance on ATMega2560? Tom Gardner <spamjunk@blueyonder.co.uk> - 2013-09-11 10:05 +0100
                Re: AREF bypass capacitance on ATMega2560? Joerg <invalid@invalid.invalid> - 2013-09-11 07:49 -0700
                Re: AREF bypass capacitance on ATMega2560? Paul <paul@pcserviceselectronics.co.uk> - 2013-09-11 16:54 +0100
                Re: AREF bypass capacitance on ATMega2560? "Tim Williams" <tmoranwms@charter.net> - 2013-09-11 11:25 -0500
                Re: AREF bypass capacitance on ATMega2560? Joerg <invalid@invalid.invalid> - 2013-09-11 09:49 -0700
                Re: AREF bypass capacitance on ATMega2560? krw@attt.bizz - 2013-09-08 11:40 -0400
                Re: AREF bypass capacitance on ATMega2560? krw@attt.bizz - 2013-09-08 11:38 -0400
                Re: AREF bypass capacitance on ATMega2560? Joerg <invalid@invalid.invalid> - 2013-09-08 09:34 -0700
                Re: AREF bypass capacitance on ATMega2560? rickman <gnuarm@gmail.com> - 2013-09-08 14:29 -0400
                Re: AREF bypass capacitance on ATMega2560? Joerg <invalid@invalid.invalid> - 2013-09-08 13:01 -0700
                Re: AREF bypass capacitance on ATMega2560? krw@attt.bizz - 2013-09-08 16:22 -0400
                Re: AREF bypass capacitance on ATMega2560? rickman <gnuarm@gmail.com> - 2013-09-10 23:09 -0400
                Re: AREF bypass capacitance on ATMega2560? krw@attt.bizz - 2013-09-08 16:15 -0400
                Re: AREF bypass capacitance on ATMega2560? Joerg <invalid@invalid.invalid> - 2013-09-08 14:20 -0700
                Re: AREF bypass capacitance on ATMega2560? krw@attt.bizz - 2013-09-08 18:15 -0400
                Re: AREF bypass capacitance on ATMega2560? Joerg <invalid@invalid.invalid> - 2013-09-08 15:57 -0700
                Re: AREF bypass capacitance on ATMega2560? krw@attt.bizz - 2013-09-08 19:46 -0400
                Re: AREF bypass capacitance on ATMega2560? Joerg <invalid@invalid.invalid> - 2013-09-08 17:15 -0700
                Re: AREF bypass capacitance on ATMega2560? krw@attt.bizz - 2013-09-08 20:20 -0400
                Re: AREF bypass capacitance on ATMega2560? Joerg <invalid@invalid.invalid> - 2013-09-09 07:17 -0700
                Re: AREF bypass capacitance on ATMega2560? Joerg <invalid@invalid.invalid> - 2013-09-09 12:17 -0700
                Re: AREF bypass capacitance on ATMega2560? krw@attt.bizz - 2013-09-09 19:30 -0400
                Re: AREF bypass capacitance on ATMega2560? Joerg <invalid@invalid.invalid> - 2013-09-09 16:38 -0700
                Re: AREF bypass capacitance on ATMega2560? krw@attt.bizz - 2013-09-10 14:02 -0400
                Re: AREF bypass capacitance on ATMega2560? rickman <gnuarm@gmail.com> - 2013-09-10 23:41 -0400
                Re: AREF bypass capacitance on ATMega2560? krw@attt.bizz - 2013-09-11 00:04 -0400
                Re: AREF bypass capacitance on ATMega2560? Joerg <invalid@invalid.invalid> - 2013-09-11 07:53 -0700
                Re: AREF bypass capacitance on ATMega2560? krw@attt.bizz - 2013-09-11 21:50 -0400
                Re: AREF bypass capacitance on ATMega2560? Joerg <invalid@invalid.invalid> - 2013-09-12 09:58 -0700
                Re: AREF bypass capacitance on ATMega2560? krw@attt.bizz - 2013-09-12 18:54 -0400
                Re: AREF bypass capacitance on ATMega2560? Piotr Wyderski <peter.pan@neverland.mil> - 2013-09-12 16:17 +0200
                Re: AREF bypass capacitance on ATMega2560? Joerg <invalid@invalid.invalid> - 2013-09-12 10:03 -0700
                Re: AREF bypass capacitance on ATMega2560? Piotr Wyderski <peter.pan@neverland.mil> - 2013-09-12 19:24 +0200
                Re: AREF bypass capacitance on ATMega2560? Tauno Voipio <tauno.voipio@notused.fi.invalid> - 2013-09-12 20:38 +0300
                Re: AREF bypass capacitance on ATMega2560? Joerg <invalid@invalid.invalid> - 2013-09-12 11:23 -0700
                Re: AREF bypass capacitance on ATMega2560? Tauno Voipio <tauno.voipio@notused.fi.invalid> - 2013-09-12 22:36 +0300
                Re: AREF bypass capacitance on ATMega2560? Joerg <invalid@invalid.invalid> - 2013-09-12 12:41 -0700
                Re: AREF bypass capacitance on ATMega2560? Tauno Voipio <tauno.voipio@notused.fi.invalid> - 2013-09-12 23:08 +0300
                Re: AREF bypass capacitance on ATMega2560? Joerg <invalid@invalid.invalid> - 2013-09-12 11:19 -0700
                Re: AREF bypass capacitance on ATMega2560? krw@attt.bizz - 2013-09-12 18:59 -0400
                Re: AREF bypass capacitance on ATMega2560? Piotr Wyderski <peter.pan@neverland.mil> - 2013-09-13 13:00 +0200
                Re: AREF bypass capacitance on ATMega2560? Joerg <invalid@invalid.invalid> - 2013-09-14 12:05 -0700
                Re: AREF bypass capacitance on ATMega2560? rickman <gnuarm@gmail.com> - 2013-09-12 16:03 -0400
                Re: AREF bypass capacitance on ATMega2560? Joerg <invalid@invalid.invalid> - 2013-09-12 14:42 -0700
                Re: AREF bypass capacitance on ATMega2560? rickman <gnuarm@gmail.com> - 2013-09-13 00:24 -0400
                Re: AREF bypass capacitance on ATMega2560? Piotr Wyderski <peter.pan@neverland.mil> - 2013-09-13 14:27 +0200
                Re: AREF bypass capacitance on ATMega2560? Joerg <invalid@invalid.invalid> - 2013-09-14 12:07 -0700
                Re: AREF bypass capacitance on ATMega2560? rickman <gnuarm@gmail.com> - 2013-09-15 02:26 -0400
                Re: AREF bypass capacitance on ATMega2560? krw@attt.bizz - 2013-09-15 09:51 -0400
                Re: AREF bypass capacitance on ATMega2560? krw@attt.bizz - 2013-09-13 20:06 -0400
                Re: AREF bypass capacitance on ATMega2560? rickman <gnuarm@gmail.com> - 2013-09-07 16:50 -0400
                Re: AREF bypass capacitance on ATMega2560? Paul Rubin <no.email@nospam.invalid> - 2013-09-07 14:33 -0700
                Re: AREF bypass capacitance on ATMega2560? rickman <gnuarm@gmail.com> - 2013-09-07 19:07 -0400
                Re: AREF bypass capacitance on ATMega2560? Paul Rubin <no.email@nospam.invalid> - 2013-09-07 16:31 -0700
                Re: AREF bypass capacitance on ATMega2560? rickman <gnuarm@gmail.com> - 2013-09-07 23:38 -0400
                Re: AREF bypass capacitance on ATMega2560? Paul Rubin <no.email@nospam.invalid> - 2013-09-08 20:19 -0700
                Re: AREF bypass capacitance on ATMega2560? rickman <gnuarm@gmail.com> - 2013-09-10 23:36 -0400
                Re: AREF bypass capacitance on ATMega2560? krw@attt.bizz - 2013-09-08 11:46 -0400
                Re: AREF bypass capacitance on ATMega2560? krw@attt.bizz - 2013-09-08 11:36 -0400
                Re: AREF bypass capacitance on ATMega2560? John Devereux <john@devereux.me.uk> - 2013-09-08 09:04 +0100
                Re: AREF bypass capacitance on ATMega2560? rickman <gnuarm@gmail.com> - 2013-09-08 13:42 -0400
                Re: AREF bypass capacitance on ATMega2560? John Devereux <john@devereux.me.uk> - 2013-09-08 19:04 +0100
                Re: AREF bypass capacitance on ATMega2560? rickman <gnuarm@gmail.com> - 2013-09-08 07:29 -0400
                Re: AREF bypass capacitance on ATMega2560? John Devereux <john@devereux.me.uk> - 2013-09-09 08:56 +0100
                Re: AREF bypass capacitance on ATMega2560? rickman <gnuarm@gmail.com> - 2013-09-10 23:54 -0400
                Re: AREF bypass capacitance on ATMega2560? krw@attt.bizz - 2013-09-08 16:24 -0400
                Re: AREF bypass capacitance on ATMega2560? Ulf Samuelsson <ulf_samuelsson@invalid.telia.com> - 2013-09-07 20:11 +0200
                Re: AREF bypass capacitance on ATMega2560? rickman <gnuarm@gmail.com> - 2013-09-07 15:06 -0400
                Re: AREF bypass capacitance on ATMega2560? Joerg <invalid@invalid.invalid> - 2013-09-07 12:54 -0700
    Re: AREF bypass capacitance on ATMega2560? Ulf Samuelsson <ulf_samuelsson@invalid.telia.com> - 2013-09-02 22:27 +0200

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