MRAM Serial access

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MRAM Serial access

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renatocosfer
Contributor I
Is there any plan to improve a  I2C/SPI   MRAM  to use with low pin-out microcontrollers ? 
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bigmac
Specialist III
Hello,
 
Please refer to the following post to see whether it provides the information you need.
 
Regards,
Mac
 
 
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renatocosfer
Contributor I
Thanks BIGMAC.
I was searching for this 2 options sometime:
-Nanoamp: Serial SRAM / 32kB / ultra low power back up supply, and
-Ramtron : FRAM
Well, about FRAM I was understanding that it has a limited number of read-write cycles, same
as Flash, but now I see on datasheets that it is "unlimeted" number of cycles.
So, it´s an option. Ramtron has up to 64kB/8 pin devices.
 
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renatocosfer
Contributor I
The issue are:
- FRAM is expensive yet :  64kB ~  $10
- Some papers inform that number of read-write cycles are ~ 1,000,000,000,000 times.
 
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rocco
Senior Contributor II
Hi Renatocosfer,

renatocosfer wrote:
- Some papers inform that number of read-write cycles are ~ 1,000,000,000,000 times.

I had not heard this before, so I wrote a little test program. The program writes/reads every millisecond, for 1000 cycles per second. I will let you know the results in about 32 years.  :smileyhappy:
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renatocosfer
Contributor I
Ok Rocco:
Virtually unlimited so, if that´s right. 
With 100,000 times the massive read-write cycles is not possible.
 
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