Hi Geert, On Wed, May 15, 2019 1, Geert Uytterhoeven wrote: > > > Does resistor R78 need to be mounted, too? > > > > By default, R78 and R79 are not populated on these boards, and both Host > > and Function work fine without board modification, so I would say > > populating R78 is not a requirement as far as I can tell. > > I asked because after reading Section 2.4 USB Interface in the RZ/A2M CPU > Board User's Manual, it's not clear to me when one needs to > populate one of these resistors. Especially in relation to JP3, which > talks about 2 possible modes (host vs. function), while the resistor > paragraph talks about 3 possible modes (dual-role vs. host vs. > function). Honestly, I'm not sure what they were thinking. They put on a USB-C connector, and put on circuitry to detect if a Host or device was attached....but then put a physical jumper on the board to connect/disconnect VBUS power. > Perhaps I just need to drink more USB Kool-Aid? > (no Kool-Aid sold in local shops, though; we live on Coke ;-) Maybe not Kool-Aid as it seem they were 'smoking something' instead. :o Chris
