It looks like you already made the OTA works.

Please let us know if you need any assistance from Silabs.

@dingyg99

It looks like you already made the OTA works.

Please let us know if you need any assistance from Silabs.

Why does the Crossbar makes pin P1.7 and how can I change it to whatever pin I want?

See the Crossbar Functional Map.

What Silabs loosely call a Crossbar, is not a full Any-X to Any-Y mapping, instead it works on the leading priority-encoded diagonal.

PCA yields to peripherals above it in the table, and you can also push-right using pin skip, so you do need to allocate all peripherals you expect to use, before doing the PCB design.

You can reserve space for a use-later peripheral using pin-skip, then when that peripheral is enabled, you removed the skips.

Agree. 

Maybe someone can test this out later if the released (pre-build) image work on GG12.

New question is here:

https://www.silabs.com/community/mcu/32-bit/forum.topic.html/giant_gecko_series1ethernet-hsW7.html

see if this helps:

https://www.silabs.com/community/mcu/8-bit/knowledge-base.entry.html/2015/08/05/how_to_create_anass-Fvzm.html

You may take a look at EFM8SB1 STK. 

I guess it fit your requirements. 

https://www.silabs.com/mcu/8-bit/efm8-sleepy-bee/device.efm8sb10f8g-qfn20#software