EEPROM I2C 24xxx, opotrebeni

[Jan Waclawek]

Aha, od ST. Do pozornosti davam aj ten udaj 4M/25stC vs. 1.2M/85stC, nie
kazdy si s tym dava namahu to specifikovat pri max. teplote. 

Catalyst/ONSemi to ma podobne, po 4 byte.

MCHP ma k tomu celu prupovidku zvyrazneny v boxe:
Note: When doing a write of less than 128 bytes the data in the rest of the
page  is refreshed along with the data bytes being written. This will
force the entire page to endure a write cycle, for this reason endurance
is specified per page.

Atmel neprezradi, ale z formulacie "page mode" je lahko mozne, ze tiez po
128 byte.

wek

----- Original Message ---------------

Subject: Re: EEPROM I2C 24xxx, opotrebeni
   From: Jaroslav Buchta <jaroslav.buchta at hascomp.cz>
   Date: Thu, 27 Oct 2016 20:20:24 +0400
     To: HW-news <hw-list at list.hw.cz>

>Jj, koukam, ze je to i slozitejsi - u te me je to pro skupinu 4 bytu 
>protoze ma ECC:
>
>The write cycle endurance is defined for group of four bytes located at 
>addresses [4*N, 4*N+1, 4*N+2,
>4*N+3] where N is an integer. The Write cycle endurance is defined by 
>characterization and qualification.
>
>A 1,2M cyklu v nejhorsim pripade, to jsem mel zafixovano, ze byva tak 
>100k... Tak to je dobry  ;-)
>
>Dne 27.10.2016 v 20:17 Jan Waclawek napsal(a):
>> Je to v datasheete. Zavisi to od vyrobcu.
>>
>> wek
>>
>>
>> ----- Original Message ---------------
>>> Jaky je princip mazani a zapisu? Potrebuju nejakym rozumnym algoritmem
>>> zaznamenavat provozni minuty, mam pamet 24512 s delkou bloku 128B
>>>
>>> Pokud budu prepisovat treba 10000x prvni 4 bajty, pak 1000x dalsi 2
>>> bajty atd. nedela se to metodou R-M-W cele stranky? Nebo pracuje pamet
>>> interne opravdu po bytech?
>>>
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