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Re: 2017-06-20-netbsd-raspi-earmv6hf.img



On Sat, 24 Jun 2017, Michael van Elst wrote:

https://www.raspberrypi.org/forums/viewtopic.php?f=29&t=75464

Not sure the point of this link, the thread is full of confusion.

One of the posters says: "The Pi uses SD High-speed mode (SDR50) at 25MB/s", but this is not true at all.

SD High-Speed mode is speed/performance-wise equivalent to UHS SDR25 mode, which runs the bus up to 50MHz and can do up to 25MB/s transfers. The difference between High-Speed and SDR25 is signalling voltage (3.3V vs 1.8V).

UHS SDR50 mode runs the bus up to 100MHz and can do up to 50MB/s transfers. 1.8V signaling is the only option here.

HTH,
Jared


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