> For the complete documentation index, see [llms.txt](https://nxp.gitbook.io/nxp-cup/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://nxp.gitbook.io/nxp-cup/2019-dfrobot-chassis-developer-guide/landzo-car-model/known-issues/frdm-board-socket-headers.md).

# FRDM Board Socket Headers

We have learned that the FRDM-K64 boards no longer ship with socket headers. This was not expected.

To attach the FRDM board to the trapezoidal System Board Dual row pin socket headers are needed. It is not recommended that you solder the FRDM directly to the System board pins as that would make it very difficult to service or access the System board.

Connectors needed are:

* 1x 12 Pin - 2 Row x 6 pin  0.100" Socket header
* 2x 16 Pin - 2 Row x 6 pin  0.100" Socket header
* 1x 20 Pin - 2 Row x 10 pin  0.100" Socket header

![](/files/-L9GM4YSpg0qWXMvZJ5W)

These socket headers follow the conventional 0.100"x 0.100" (2.54mmx2.54mm) pin spacing shown below

* [**An example of these components from Mouser**](https://www.mouser.com/Connectors/Board-to-Board-Mezzanine-Connectors/_/N-ay0kr?P=1ytkls1Z1yvgchuZ1ytkn39Z1ytkn06Z1z0j1prZ1z0z5h6Z1z0wxp6Z1z0zlewZ1z0zlg8\&Keyword=2.54mm\&FS=True)

![](/files/-L9GM4YsmK4C7GaQuTzu)