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Support SD cards in DDR50 mode #2177

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machdyne opened this issue Feb 6, 2025 · 0 comments

machdyne commented Feb 6, 2025

It appears that support for 1.8V operation was removed in 2020 but maybe there's interest in resupporting it?

Here is an open-source PMOD that supports 1.8V level translation:

https://github.com/machdyne/microsd

It's been been tested with DDR50 mode by @ZipCPU:

https://github.com/ZipCPU/sdspi

Would it be possible to increase sdcard speeds under linux-on-litex-vexriscv if support for DDR50 were added to LiteX?

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