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TOPIC: MCP2221 and Programming ALL My Devices

MCP2221 and Programming ALL My Devices 3 years 4 months ago #17671

  • Jon Chandler
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No handshake lines and it's hardwired for N 8 1 parameters (parity, number of bits, parity) but that's pretty standard these days.

MCP2221 and Programming ALL My Devices 3 years 4 months ago #17672

  • be80be
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But that means that theres not going to be a easy way to auto flash with that chip.
USB to serial is not it's main reason for being
You need a true usb to serial chip that hanldes serial in hardware. You need four lines RX TX DT RT. Plus power lines.

MCP2221 and Programming ALL My Devices 3 years 4 months ago #17673

  • hop
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Plus... and I don't remember where I mentioned it, but the 2221 has a delay of 30ns between each sent byte. Also effects what it can read. The CH340G only has 1ns delay between bytes sent. I posted the link to the info on this somewhere in another thread perhaps.

And I agree with needing the handshake lines. The 5v/3.3v CP2102 boards I got have 6 pins on the connector, but only one is called RST but no DTR (or DTS or CTS). I haven't found a way to use it "automatically" like you can with on-board CP2102 or FTDI USB to Serial bridge boards.

MCP2221 and Programming ALL My Devices 3 years 4 months ago #17674

  • be80be
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Here some pictures of a homemade Ch340 I made you can't beat it it works great.
I made it to flash the ESP2866-12 but it was so easy to add it to my esp boards i just started including it to them.

This is bull shit you can't post a picture or you tube or I can't anymore
Last Edit: 3 years 4 months ago by be80be.

MCP2221 and Programming ALL My Devices 3 years 4 months ago #17675

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See if this works

MCP2221 and Programming ALL My Devices 3 years 4 months ago #17676

  • be80be
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I can't post attachments but i can post a link to a picture that's crazy.

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