Subject:
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RE: Flash Write Cycles
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Newsgroups:
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lugnet.robotics.nxt
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Date:
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Sun, 10 Sep 2006 05:47:31 GMT
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Reply-To:
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<DICKSWAN@SBCGLOBALstopspammers.NET>
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Viewed:
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12165 times
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> John Hansen wrote:
>
> > Any knowledgeable people out there in this area?
>
> Dick Swan comes to mind, but it may fall under the category of
> protected intellectual property.
I researched this topic about eight months ago. I no longer worry about
it. I must admit I didn't know about the "lock-bits" specification and
was concerned only with the "flash rewrite specification".
I have also had other conversations on this topic which unfortunately
are covered by NDA.
Here's some public domain information tidbits that are relevant.
1) Limit on flash memory cycles is across the complement of extreme
temperature ranges and voltage battery levels of the device. I double it
anyone intents to operate their NXTs at these temperature extremes.
2) I never kept the web reference, but there was a similar question
posted in a newsgroup for a robotics design contest that was held a few
years back. The contest product used an Atmel AVR series CPU.
There was a response from an Atmel Support Engineer -- his reply was
along the lines of "our specs are conservative", "specs are for
temperature extremes". The most interesting comment was "the main
failure mode is a reduction in the data retention time". I think most
NXT users are willing to accept a reduction in the 40-year data
retention specification for flash.
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Message is in Reply To:
 | | Re: Flash Write Cycles
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| (...) When downloading a program to the NXT using NBC if there is a file with the same name on the NXT already it is first deleted. Then a new file is created and written using the same filename. I don't know whether that means the firmware will (...) (18 years ago, 10-Sep-06, to lugnet.robotics.nxt)
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