Hi, I want to buy this chip with automatic backup to EEPROM in case of voltage loss. I would like to ask you, do you have any experience with that? The problem will be to create a library and maybe a little with a connection ( I have Arduino Mega 2560). Thank you, the link is below.
The connections should be straight forward as the chip uses SPI. The library might be trickier.
Microchip 48L512/48LM01 datasheet
Depending on needs, you might also want to look at FRAM modules (the standard available ones are smaller though and there should be a library available).
I did try one of these automatic backup to EEPROM devices maybe 3 or 4 years ago. Worked OK as a RAM but the backup to EEPROM bit was not working for me.
I switched to using FRAMs, which I find are very reliable.
sterretje:
The connections should be straight forward as the chip uses SPI. The library might be trickier.Microchip 48L512/48LM01 datasheet
Depending on needs, you might also want to look at FRAM modules (the standard available ones are smaller though and there should be a library available).
Thank you. Don't you know where I can get a library? What is the difference between this chip and FRAM? And how to work with FRAM? I was trying to fing something, but SPI FRAM in our country = 17 euro and this chip only 3 euros... And I want more for others projects.
I had a quick look for a library, but could not find one.
sterretje:
I had a quick look for a library, but could not find one.
me too 
Maybe you can make this a learning opportunity to write a library... Can you program in C?
Why in particular an SPI FRAM ?
The I2C ones use only 2 IO pins versus 4 for the SPI version.
hzrnbgy:
Maybe you can make this a learning opportunity to write a library... Can you program in C?
I cannot write libraries...
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