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Discussion Groups | 68HC12 | C128 FLASH Limitations/Capabilities?
Join our technical discussions about Freescale Microcontrollers: M68HC12. (Freescale Semiconductor is a Subsidiary of Motorola).
C128 FLASH Limitations/Capabilities? - jmey...@emittechnologies.com - Jan 13 10:55:39 2009
What are the read/write cycle limitations of the FLASH system on a HCS12-based controller?
10,000 R/W? 100,000 R/W?
Also, if I was to reach the limitations on one block, are the other blocks in danger of loosing their integrity?
------------------------------------
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Also, if I was to reach the limitations on one block, are the other blocks in danger of loosing their integrity?
------------------------------------
(You need to be a member of 68hc12 -- send a blank email to 68hc12-subscribe@yahoogroups.com )
Re: C128 FLASH Limitations/Capabilities? - Greg Broburg - Jan 13 11:23:41 2009
Try having a look at Application Note AN2302
EEPROM Emulation for the 9S12C32.
Greg
j...@emittechnologies.com wrote:
>
> What are the read/write cycle limitations of the FLASH system on a
> HCS12-based controller? 10,000 R/W? 100,000 R/W?
>
> Also, if I was to reach the limitations on one block, are the other
> blocks in danger of loosing their integrity?
>
>
------------------------------------
______________________________
Stellaris® MCU Family: New Parts, New Package, New Price.
(You need to be a member of 68hc12 -- send a blank email to 68hc12-subscribe@yahoogroups.com )
EEPROM Emulation for the 9S12C32.
Greg
j...@emittechnologies.com wrote:
>
> What are the read/write cycle limitations of the FLASH system on a
> HCS12-based controller? 10,000 R/W? 100,000 R/W?
>
> Also, if I was to reach the limitations on one block, are the other
> blocks in danger of loosing their integrity?
>
>
------------------------------------
______________________________
Stellaris® MCU Family: New Parts, New Package, New Price.
(You need to be a member of 68hc12 -- send a blank email to 68hc12-subscribe@yahoogroups.com )
Re: C128 FLASH Limitations/Capabilities? - eqh2 - Jan 13 11:47:54 2009
--- In 6...@yahoogroups.com, jmeyer@... wrote:
>
> What are the read/write cycle limitations of the FLASH system on a
HCS12-based controller? 10,000 R/W? 100,000 R/W?
>
> Also, if I was to reach the limitations on one block, are the other
blocks in danger of loosing their integrity?
>
I would search for "NVM reliability" or "data integrity" in the data
sheet for your part. You are actually concerned about program/erase
cycles because reading does not stress the NVM. You may also be
concerned about data retention. This is actually temperature dependant
but they may not give you all of that information in the data sheet. If
you are really concerned, you might want to look for EB618 and EB619.
I don't think the stress on one block would affect another. If you
erase a single sector many times (in EEPROM applications) it does not
affect other sectors. In fact, some applications copy the data from one
sector to another to extend the useful life of the part.
------------------------------------
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>
> What are the read/write cycle limitations of the FLASH system on a
HCS12-based controller? 10,000 R/W? 100,000 R/W?
>
> Also, if I was to reach the limitations on one block, are the other
blocks in danger of loosing their integrity?
>
I would search for "NVM reliability" or "data integrity" in the data
sheet for your part. You are actually concerned about program/erase
cycles because reading does not stress the NVM. You may also be
concerned about data retention. This is actually temperature dependant
but they may not give you all of that information in the data sheet. If
you are really concerned, you might want to look for EB618 and EB619.
I don't think the stress on one block would affect another. If you
erase a single sector many times (in EEPROM applications) it does not
affect other sectors. In fact, some applications copy the data from one
sector to another to extend the useful life of the part.
------------------------------------
(You need to be a member of 68hc12 -- send a blank email to 68hc12-subscribe@yahoogroups.com )
Re: C128 FLASH Limitations/Capabilities? - jmey...@emittechnologies.com - Jan 13 12:25:52 2009
It looks like 10,000 erase/read cycles per sector are guaranteed.
Thank you!
What are the read/write cycle limitations of the FLASH system on a HCS12-based controller? 10,000 R/W? 100,000 R/W?
>
>Also, if I was to reach the limitations on one block, are the other blocks in danger of loosing their integrity?
>
>------------------------------------
------------------------------------
(You need to be a member of 68hc12 -- send a blank email to 68hc12-subscribe@yahoogroups.com )
Thank you!
What are the read/write cycle limitations of the FLASH system on a HCS12-based controller? 10,000 R/W? 100,000 R/W?
>
>Also, if I was to reach the limitations on one block, are the other blocks in danger of loosing their integrity?
>
>------------------------------------
------------------------------------
(You need to be a member of 68hc12 -- send a blank email to 68hc12-subscribe@yahoogroups.com )