RST can be manually set.) are HIGH by default.

The reason why the inversion of the pins are done by hardware, and not by the config file, is because the pin-state of the 2 important programmer outputs (SCK and MOSI. If you notice the description, the inverted pins are *not* actually inverted on the configuration, this is because you need to invert it using a NOT Gate (TTL-Logic is inverted RS-232 remember? So I used a 74ls04 on mine). The big question is how did I do it? First, I made a new programmer entry to the nf:Ĭode: Select all | TOGGLE FULL SIZE #CH340 based USB-Serial/TTL adapters.ĭesc = 'ttl port banging, reset=txd sck=!rts mosi=!dtr miso=!cts (invert signals using 74ls04)' The problem is that CH340 based adapters are 'TTL' and because of this, it uses the 'inverted logic' that of an RS-232 (+12v = 0, -12v = +5v). Recently I have been playing with mine, and, to my surprise, I was able to program an AVR. you'd have to use a PL2303 based USB-Serial adapter, and CH340 based adapters are a no-go. Before, it was a fact that when you want to use a USB-to-Serial adapter to be able to use a serial programmer such as 'ponyser', 'dasa3', etc. Ultra-stable.Okay, now this is much more interesting than my previous post.

Perfectly compatible with all Series MCU will not be because of the different drivers that would lead to problems like PL2303 can not download the program. new original CH340G chips, the chips are recommended official USB to TTL chips will not appear due to different driver / different computer as a result of incompatibilities!ĬH340 module/ USB switch TTL/ USB transfer RS232/ over PL2303/ downloader/ 9 Brush board STC official download chip. high-quality high-grade yellow pin, pin durable than the black market, beautiful ĥ.

not only has the power light PWR, there TXD and RXD indicator, whether the product is easy to learn and intuitive to work in the absence of the instrument in the case Ĥ. 3 V3 and 5V by a short circuit risk selection ģ. TTL interface output, easy to connect to your MCU.ĭual 3.3V and 5V Power output, work with 3.3v and 5v target device.ġ. Designed to be used for USB to TTL electronic projects.

Pl2303 to usb ch340