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Added Footprints for Microchip AVR-DA devices in VQFN package

Dominformant requested to merge dominformant/kicad-footprints:FP_Microchip_AVR-DA into master

This Merge Request adds the 9x9mm VQFN-64 and 6x6 VQFN-48 footprints used for the Microchip AVR-DA family devices.

Datasheets:

http://ww1.microchip.com/downloads/en/DeviceDoc/64L_QFN_9x9_MR_C04-00149e.pdf

http://ww1.microchip.com/downloads/en/DeviceDoc/48L_VQFN_6x6mm_6LX_C04-00494a.pdf

The footprints are generated using the following size definitions: kicad-footprint-generator!673 (merged)

Screenshots:

VQFN-64-1EP_9x9mm_P0.5mm_EP7.15x7 VQFN-48-1EP_6x6mm_P0.4mm_EP4.1x4

All contributions to the kicad library must follow the KiCad library convention

Thanks for creating a pull request to contribute to the KiCad libraries! To speed up integration of your PR, please check the following items:

  • Provide a URL to a datasheet for the footprint(s) you are contributing
  • An example screenshot image is very helpful
  • If there are matching symbol or 3D model pull requests, provide link(s) as appropriate
  • Check the output of the automated check scripts - fix any errors as required
  • Give a reason behind any intentional library convention rule violation.

Be patient, we maintainers are volunteers with limited time and need to check your contribution against the datasheet. You can speed up the process by providing all the necessary information (see above). And you can speed up the process even more by providing a dimensioned drawing of your contribution. A tutorial on how to do that is found here: https://forum.kicad.info/t/how-to-check-footprint-correctness/9279 (This is optional!)

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