Yeah, I ran across that too...
I also saw a mention somewhere online that one only had to have a license if they wanted to use the SD Card logo, etc.
I'm trying to see if our legal group can look into it.
Thanks Paul,
This is an important issue for me as I am part of a team that builds custom lab equipment for scientific research (we have used many many Teensys over the years). We have a mandate to open source our designs. A license requirement...
I need to use the fast 4-bit mode on a Teensy 4.0 and the example code seems to work fine. However, I was under the impression that the 4 bit mode was regulated by the SD Association and required a license. Is the Arduino fast SD code different...