Add npm1100 QFN24 center pad (pin 25) as AVSS

[jeffc]

Title:

Add npm1100 QFN24 center pad (pin 25) as AVSS

Description:

According to this devzone answer, the center pad should be connected to AVSS (ground). This is not documented directly in the product specification, only hinted at by the example schematics.

Scope of change:

Schematic (npm1100 QDXX)

Change detail:

• symbols/nordic-lib-kicad-npm.kicad_sym: Fix incorrect pin mappings

Screenshots:

Before:

After:

Source of change or fix:

https://devzone.nordicsemi.com/f/nordic-q-a/110896/help-with-strange-npm1100-performance

Testing:

Made a test schematic with this symbol and the associated QFN-24 footprint. Ensured that new connection is established appropriately.

Checklist:

• [ ✅] My change follows the conventions of the library
• [ ✅] My changes generate no new warnings

[hlord2000]

Thanks for the contribution @jeffc

Could you change the pin name to "EP" per KiCAD convention, make it invisible, and stack it w/ the existing AVSS pin? I'm going to go through symbols soon and stack any analog/digital grounds.

Thanks!

[jeffc]

@hlord2000 I just did the overlap/invisible switch, but I didn't change the name to EP -- the footprint library that this footprint uses (kicad's Package_DFN_QFN) still uses a number (in this case 25) for the center pad. Changing it to EP breaks the symbol <-> footprint association

[hlord2000]

@hlord2000 I just did the overlap/invisible switch, but I didn't change the name to EP -- the footprint library that this footprint uses (kicad's Package_DFN_QFN) still uses a number (in this case 25) for the center pad. Changing it to EP breaks the symbol <-> footprint association

The pin name can still be changed to EP. Some other symbols do this, some do not. It's definitely bikeshedding on my part lolol. lgtm and will merge