03-16-2020, 12:44 PM
(03-16-2020, 08:18 AM)danielt Wrote: CH340R is a special case part designed to reduce part counts by eliminating the need for any external inverting buffer when interfacing with a system that does not idle at logic 1 (IrDA for example). Connecting this part to a device that does idle at logic 1 would make no sense and and when is doesn't work it would certainly not be due to any fault in the PBP.
Selling a 5V adapter for computers with 3.3 inputs doesn't make sense either. I'm not suggesting that the problem is with the PBP. It's just from what I've read, the correct adapter should be both 3.3V and not hold the RX pin of the PBP while booting. The note on the NixOS Wiki doesn't specify whether the problem is from being held low or high.
