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Linux - Embedded & Single-board computer This forum is for the discussion of Linux on both embedded devices and single-board computers (such as the Raspberry Pi, BeagleBoard and PandaBoard). Discussions involving Arduino, plug computers and other micro-controller like devices are also welcome.


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Old 03-18-2019, 04:24 PM   #1
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Static Ram to retain data in a embedded system

Hi everybody,

I would like to know if somebody has experience with this topic.
Right now, I have implemented similar scenario but using a FPGA as bridge between x86 cpu and Static ram.

Now, I would like to use a static ram connected directly to a pci express or similar.

I don't know if Linux has capabilities to handle this type of ram memories directly.

Thank you in advance.
Old 03-20-2019, 05:28 AM   #2
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I doubt if static ram will retain memory in any system. The sole advantage it has is that it doesn't need refreshing, but it loses memory when the power goes, as well as being slower to write, and scarce.

Use battery backed ram, or NVRAM, such as is used for the bios settings in your motherboard. You have a slower & more expensive option in EEPROM (Electrically Erasable Programmable ROM). If you have an fpga in there, you can handle either, but I'd recommend NVRAM.


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