[WIP] Xilinix BGA footprints

[herostrat]

This is a tracking issue to compile the work of footprints for Xilinix BGAs.

https://www.xilinx.com/support/documentation/user_guides/ug475_7Series_Pkg_Pinout.pdf

1. Artix-7

• Script PR: adds xilinx artix 7 based bga footprints and functionality pointhi/kicad-footprint-generator#343
• Footprint PR: [RFC] adds BGA packages for Xilinx 7 Artix FPGAs #1557 (with a lot of additional information and images)

2. Spartan-7

• Script PR: adds dimensions for spartan-7 series FPGA BGA packages pointhi/kicad-footprint-generator#345
• Footprint PR: adds all BGA footprints for Xilinx Spartan-7 FPGAs #1568
  Other Initiatives:
• Script PR: Add some Xilinx BGA packages. pointhi/kicad-footprint-generator#344 (closed in favor of new PR)
  Footprint PR:

3. Kintex-7

• Script PR: adds definition for Xilinx Kintex-7 BGA FPGAs pointhi/kicad-footprint-generator#350
• Footprint PR: adds footprints for Xilinx Kintex-7 BGAs #1584

4. Virtex-7

• Script PR: adds footprint definition for Xilinx Virtex-7 BGA pointhi/kicad-footprint-generator#349
• Footprint PR: adds BGA footprints for Xilinx Virtex-7 FPGAs #1569

5. Zynq

• Script PR: adds package definitions for Xilinx Zynq-7000 series BGAs pointhi/kicad-footprint-generator#355
• Footprint PR: adds footprints for Xilinx Zynq-7000 BGAs #1596
  Other Initiatives:
• Script PR: Bga xilinx zynq 7 pointhi/kicad-footprint-generator#240 (closed in favor of new PR)
• Footprint PR: add Xilinx Zynq 7 BGAs #1167 (closed in favor of new PR)

Additional Work:

• For Artix-7 and Spartan-7 series, re-name footprints to include all applicable package names in footprint name. See adds xilinx virtex bga packages pointhi/kicad-footprint-generator#346 (comment) for more details.

• Remove old and/or wrong packages that reference to Xilinix FPGAs, PR: Move BGA footprints that are a duplicate of Xilinx BGAs to obsolete  #1597

  • https://github.com/KiCad/kicad-footprints/blob/master/Package_BGA.pretty/BGA-676_27.0x27.0mm_Layout26x26_P1.0mm_Ball0.6mm_Pad0.5mm_NSMD.kicad_mod
    This is FG(G)676.
    I cannot find any reference in the symbol library.
    TODO: search if other manufactorer use the same footprint and if it is sensible to name it generically

  • https://github.com/KiCad/kicad-footprints/blob/master/Package_BGA.pretty/BGA-256_14.0x14.0mm_Layout16x16_P0.8mm_Ball0.45mm_Pad0.32mm_NSMD.kicad_mod
    This is FT256, which should have a 1.0mm pitch. Our footprint has a 0.8mm pitch, which does not exist and is false (the dosument it links to in the description also does state 1.0mm)
    I cannot find any reference in the symbol library.

  • https://github.com/KiCad/kicad-footprints/blob/master/Package_BGA.pretty/BGA-256_17.0x17.0mm_Layout16x16_P1.0mm_Ball0.5mm_Pad0.4mm_NSMD.kicad_mod
    This is FT256 with a 1.0mm pitch.
    I cannot find any reference in the symbol library.
    TODO: search if other manufactorer use the same footprint and if it is sensible to name it generically

  • https://github.com/KiCad/kicad-footprints/blob/master/Package_BGA.pretty/BGA-400_21.0x21.0mm_Layout20x20_P1.0mm.kicad_mod
    This is the FG400 package and is not yet covered in my PR.
    I cannot find any reference in the symbol library.
    TODO: recheck if it exists and is correct.

  • https://github.com/KiCad/kicad-footprints/blob/master/Package_BGA.pretty/BGA-484_23.0x23.0mm_Layout22x22_P1.0mm.kicad_mod
    This is FG(G)484.
    The solder mask opening is wrong here.
    I cannot find any reference in the symbol library.
    TODO: search if other manufactorer use the same footprint and if it is sensible to name it generically

  • https://github.com/KiCad/kicad-footprints/blob/master/Package_BGA.pretty/FB-BGA-484_23.0x23.0mm_Layout22x22_P1.0mm.kicad_mod
    This is FG(G)484, which is the same as 5.
    The naming is pretty confusing imho

  • https://github.com/KiCad/kicad-footprints/blob/master/Package_BGA.pretty/BGA-1156_35.0x35.0mm_Layout34x34_P1.0mm.kicad_mod
    This is FG(G)1156

[evanshultz]

Thanks so much!

Is there any more renaming that needs to take place to ensure all applicable package names are captured in the footprint names?

[herostrat]

Thank you for your patience and reviews, it was a blast!

Afaik those were all BGA packages Xilinx uses for the 7-series chips, so no, I don't think so.

The remaining work is cleaning up the "old" packages (as you previously stated according to #1167 (comment)) and close similar PRs.

[evanshultz]

@herostrat
#1167 and pointhi/kicad-footprint-generator#240 have a section named "Duplication of existing parts". Are you open to checking that out to see if those are footprints that are unneeded? It appears they are not covered in the list above.

[herostrat]

Yes, I will, this will be the next workpackages for me.
The ones listed above are just the starting point I already identified.