2019-07-30T20:48:01

cp2102 ttl to usb header

Designed and created USB to TTL header using cp2102 chip that has nearly the size of PinSocket_1x06_P2.54mm_Horizontal header. So that either PinSocket can be soldered or when permanent micro USB is needed this little board.

1st version

Pictures of first working/tested version below, KiCAD files on GitHub.

It nearly worked out of the box, but for the RX&TX transmit led indication. Those needed to be enabled (cp2102 programmed) using Simplicity Studio 4 and Xpress configurator. It's all well described in AN721: USBXpress™ Device Configuration and Programming Guide.

and here work table after 3h+ spent on soldering&testing:


What next?

The next version should have:

  • reversed ftdi connector pins so that the USB connector will end-up between two PCB when soldered on to the TTL PCB or better allow soldering of the USB connector on both sides
  • ftdi connector pins labeled also from the other side
  • solder jumper instead of 2x 0Ω resistors to switch between 3.3V and 5V
  • 4 layer PCB to make it even more compact?

We'll see when "the future" comes...

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