Rock64 v3 and SD-Cards
#7
(05-08-2019, 09:49 AM)Leapo Wrote: From what I've heard, the issue is that GPIO0_D6 (SDMMC0_PWREN) is left floating by current Linux devicetree configurations, but needs to be set to high or low in order to select an appropriate SDCard voltage.

You can solder a connection between test pad 2302 and 3.3v to revert your Rev3 board's SD-Card slot to Rev2 behavior, which should work with all cards.
If you have a UHS-capable MicroSD card, you can solder a connection between test pad 2303 and ground to force the slot into UHS mode.

Edit: The test pad can be located on the back of the PCB, near the center. I've highlighted it in this drawing, in red: https://i.imgur.com/F9BCSkj.png

It works! I couldn't get it to work connecting it to 3.3V (I'm using UHS cards) but only to ground.
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Messages In This Thread
Rock64 v3 and SD-Cards - by Humberg - 05-06-2019, 10:04 AM
RE: Rock64 v3 and SD-Cards - by Luke - 05-08-2019, 02:54 AM
RE: Rock64 v3 and SD-Cards - by Leapo - 05-08-2019, 09:49 AM
RE: Rock64 v3 and SD-Cards - by ketominer - 05-16-2019, 02:50 PM
RE: Rock64 v3 and SD-Cards - by Luke - 05-10-2019, 06:03 AM
RE: Rock64 v3 and SD-Cards - by tllim - 05-12-2019, 03:22 PM
RE: Rock64 v3 and SD-Cards - by dene - 05-13-2019, 01:04 AM
RE: Rock64 v3 and SD-Cards - by PDXpi - 06-05-2019, 06:25 AM
RE: Rock64 v3 and SD-Cards - by Leapo - 05-27-2019, 12:33 PM
RE: Rock64 v3 and SD-Cards - by Luke - 06-02-2019, 08:12 AM
RE: Rock64 v3 and SD-Cards - by elibenyaacov - 06-02-2019, 02:04 AM
RE: Rock64 v3 and SD-Cards - by igorp - 06-06-2019, 12:48 AM

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