3 ms·
The goal is to not configure the MMC at all in Linux, but just rely on the bootloader has already configured it. Btw, where can I find the spec? And where in t
by eerimoq 6y ago
The goal is to not configure the MMC at all in Linux, but just rely on the bootloader has already configured it.
Btw, where can I find the spec? And where in the spec can I read about this? Is this true even if we know the MMC supports 52 MHz?
- dmitrygr 6y agoSpec says initialization shall be done at 400KHz or less. You can Google for sd spec
- eerimoq 6y agoWill fix it at some point =)
- OnACoffeeBreak 6y agohttps://www.jedec.org/sites/default/files/docs/JESD84-B451.pdf https://www.jedec.org/sites/default/files/docs/JESD84-B451.p... You can use http://bugmenot.com/view/jedec.org http://bugmenot.com/view/jedec.org to get free-to-use credentials. The section in point is "A.6.1Bus initialization". I'd say that if your MMC works fine going full-speed out of the gate and the IC on the board supports this speed, then you unlikely to encounter any issues.
- eerimoq 6y agoThank you very much. Very helpful answer. I'll continue to use 52 MHz until I encounter problems (if any).