I am in the process of creating footprints and symbols for custom boards based on the teensy using the IC's available at https://www.pjrc.com/store/ic_mkl02_t4.html . I already have a footprint and am working on the Symbol in the same style that PJRC uses on the schematic at https://www.pjrc.com/store/teensy41.html near the bottom of the page.
I think the pin mappings are correct to the footprint, needs double checking, but in KiCad symbol editor I have settings for the "Electrical Type" and "Graphic Style". Is there a known mapping of the defaults, I can leave it as is but I am willing to enter them if known. I skimmed through all the documentation and also checked what I had access to on NXP's site.
Also there are about 50 pins/balls not used, that I counted, that aren't in this particular Symbol because PJRC doesn't use them which Paul hints to in various posts and/or documentation due to size constraints, I will end up adding them in a separate symbol just for completeness. I haven't looked carefully yet, but I think the SparkFun schematic symbol of the Teensy MicroMod is the same PJRC uses.
The Options in KiCAD of "Electrical Type" are:
The footprint can also be updated from the Defaults of KiCAD, there is a Clearance Override for each ball that defaults to 8mil which will not allow traces to be placed, This is dependent on the Board House capabilities and depends on the quantity of Layers the board has. What is Ideal for this IC?
Even though OshPark has specific capabilities I will try ordering 4 and 6 layer boards to test my footprints when I get this all entered in.
Thanks in advance for any replies.
Jorge
I think the pin mappings are correct to the footprint, needs double checking, but in KiCad symbol editor I have settings for the "Electrical Type" and "Graphic Style". Is there a known mapping of the defaults, I can leave it as is but I am willing to enter them if known. I skimmed through all the documentation and also checked what I had access to on NXP's site.
Also there are about 50 pins/balls not used, that I counted, that aren't in this particular Symbol because PJRC doesn't use them which Paul hints to in various posts and/or documentation due to size constraints, I will end up adding them in a separate symbol just for completeness. I haven't looked carefully yet, but I think the SparkFun schematic symbol of the Teensy MicroMod is the same PJRC uses.
The Options in KiCAD of "Electrical Type" are:
- Input
- Output
- BiDirectional
- TriState
- Passive
- Free
- Unspecified
- Power Input
- Power Output
- Open Collector
- Open Emotter
- Unconnected
- Line
- Inverted
- Clock
- Inverted Clock
- Input Low
- Clock Low
- Output Low
- Falling Edge Clock
- NonLogic
The footprint can also be updated from the Defaults of KiCAD, there is a Clearance Override for each ball that defaults to 8mil which will not allow traces to be placed, This is dependent on the Board House capabilities and depends on the quantity of Layers the board has. What is Ideal for this IC?
Even though OshPark has specific capabilities I will try ordering 4 and 6 layer boards to test my footprints when I get this all entered in.
Thanks in advance for any replies.
Jorge
