So I have heard lot of guys complaining the lack of a good English datasheet of WCH CH340G chip. Here I made one translating from the original Chinese datasheet. (WCH's CH340 Series Datasheet in English does not cover CH340G, only CH340R and T)
The PDF file should be in all vector format and should be able to be printed out nicely.
Moderators when you see this please pin.