Add support for YuanLey YS25-0402 (PCB-K0402WS-V1.0)

UART is broken out to the unpopulated switch header at the front of the
board.

This isn't quite the same as the V2.0 definition as the system led is
always on, not routed through the CPU.

Additionally, document that the newer revision of the same "YS25-0402"
is supported via the existing PCB-K0402WS-V3.0 target.
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Matt Merhar committed 2026-10-17 18:51:45 -04:00
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@@ -22,6 +22,11 @@ of the device just above the big label, might be covered by a QC sticker.
* SICSOLINK SL-G0402F
<img src="photos/PCB-K0402WS-V3.0/SICSOLINK SL-G0402F.jpg" width="300"/>
* YuanLey YS25-0402 <sup><sub>Note: there are [multiple revisions](PCB-K0402WS-V1.0.md) of the YS25-0402. This is the newer revision that has a "Vlan" switch on the front.</sub></sup>
<img src="photos/PCB-K0402WS-V3.0/YuanLey_YS25-0402.jpg" width="300"/>
### Programming
Using SPI clamp in-board is the only method for initial installation.