1.1 Phase C1: W5500 datasheet verification — 2 bugs fixed, Ethernet unblocked

Checked against WIZnet W5500 datasheet v1.1.0 (official pin table):
- CONFIRMED correct: pin 23 RSVD->GND, pin 18 VBG floating, EXRES1 12.4k/1%,
  PMODE[2:0]=111 autoneg via pins 43-45, LINKLED/ACTLED pins 25/27 active-low
  sink topology, TXN/TXP/RXN/RXP order (1/2/5/6), SPI on 32-37
- BUG FIXED: RSVD pins 38-42 were floating; datasheet requires GND. Added
  5 GND stubs on U11 in the schematic + (net GND) on board pads 38-42
- BUG FIXED: TOCAP/1V2O caps were 10uF/4.7uF; datasheet requires 4.7uF/10nF.
  C90 -> 4.7uF, C91 -> 10nF (sch + board values; footprints unchanged)
- R83 board value harmonized to sch's 12.4k/1%
Magjack HR911105A: wiring matches the standard table (TX 1/2, RX 3/6,
TCT pin4->3V3_ETH, RCT pin5->6.8nF, internal Bob Smith). Bench-check with
DMM before flash: pins 4/5 CT assignment + LED anode/cathode on 9-12.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01GSKKes8GsS4YHAMWJ44tCm

03-Architecture-Hardware/kicad/hbox-watchdog-v4.kicad_pcb

@@ -3568,35 +3568,35 @@
 			(layers "F.Cu" "F.Mask" "F.Paste")
 			(roundrect_rratio 0.25)
 			(uuid "c3df91b2-d85a-4331-9ce1-a5b309bb0f71")
-		)
+		 (net "GND"))
 		(pad "39" smd roundrect
 			(at 1.75 -3.4375)
 			(size 0.25 0.875)
 			(layers "F.Cu" "F.Mask" "F.Paste")
 			(roundrect_rratio 0.25)
 			(uuid "1d15340e-a2cc-4561-9336-0de949be2ea5")
-		)
+		 (net "GND"))
 		(pad "40" smd roundrect
 			(at 1.25 -3.4375)
 			(size 0.25 0.875)
 			(layers "F.Cu" "F.Mask" "F.Paste")
 			(roundrect_rratio 0.25)
 			(uuid "73ca0a37-f08e-46d7-b4f0-487980c10d53")
-		)
+		 (net "GND"))
 		(pad "41" smd roundrect
 			(at 0.75 -3.4375)
 			(size 0.25 0.875)
 			(layers "F.Cu" "F.Mask" "F.Paste")
 			(roundrect_rratio 0.25)
 			(uuid "051795b6-fae3-40e4-9d58-2608ed3e4523")
-		)
+		 (net "GND"))
 		(pad "42" smd roundrect
 			(at 0.25 -3.4375)
 			(size 0.25 0.875)
 			(layers "F.Cu" "F.Mask" "F.Paste")
 			(roundrect_rratio 0.25)
 			(uuid "6c10c8c5-7a62-4105-805a-d8f30de572a6")
-		)
+		 (net "GND"))
 		(pad "43" smd roundrect
 			(at -0.25 -3.4375)
 			(size 0.25 0.875)
@@ -7335,7 +7335,7 @@
 				)
 			)
 		)
-		(property "Value" "4.7uF"
+		(property "Value" "10nF"
 			(at 0 1.68 0)
 			(layer "F.Fab")
 			(uuid "1f4b02a2-0844-43a7-af02-54b0d2c5e490")
@@ -38562,7 +38562,7 @@
 				)
 			)
 		)
-		(property "Value" "10uF"
+		(property "Value" "4.7uF"
 			(at 0 1.68 0)
 			(layer "F.Fab")
 			(uuid "e1cef26a-9b05-47d0-95ed-57ad6f7a78aa")
@@ -42981,7 +42981,7 @@
 				)
 			)
 		)
-		(property "Value" "12.4k"
+		(property "Value" "12.4k/1%"
 			(at 0 1.43 0)
 			(layer "F.Fab")
 			(uuid "9614ed74-a905-4e8b-ac97-7484f5bbbfd0")

03-Architecture-Hardware/kicad/hbox-watchdog-v4.kicad_sch

@@ -34403,7 +34403,7 @@
 				)
 			)
 		)
-		(property "Value" "10uF"
+		(property "Value" "4.7uF"
 			(at 744.68 149.4 0)
 			(show_name no)
 			(do_not_autoplace no)
@@ -34533,7 +34533,7 @@
 				)
 			)
 		)
-		(property "Value" "4.7uF"
+		(property "Value" "10nF"
 			(at 751.03 149.4 0)
 			(show_name no)
 			(do_not_autoplace no)
@@ -38739,4 +38739,104 @@
 		)
 		(uuid "77d92d4e-5f7d-4eaa-93f7-56bc0ea4547a")
 	)
+	(wire
+		(pts
+			(xy 704.85 110.49) (xy 697.23 110.49)
+		)
+		(stroke
+			(width 0)
+			(type default)
+		)
+		(uuid "f130d0e3-14b5-4249-9e37-c7ee41e1684f")
+	)
+	(label "GND"
+		(at 697.23 110.49 0)
+		(effects
+			(font
+				(size 1.27 1.27)
+			)
+			(justify right bottom)
+		)
+		(uuid "297ba7e8-0a1b-47b3-af69-87d676597600")
+	)
+	(wire
+		(pts
+			(xy 704.85 113.03) (xy 697.23 113.03)
+		)
+		(stroke
+			(width 0)
+			(type default)
+		)
+		(uuid "ea1b609e-b295-447d-8280-92b51c262932")
+	)
+	(label "GND"
+		(at 697.23 113.03 0)
+		(effects
+			(font
+				(size 1.27 1.27)
+			)
+			(justify right bottom)
+		)
+		(uuid "ee68b15a-3a28-4489-8be4-6e110575f127")
+	)
+	(wire
+		(pts
+			(xy 704.85 115.57) (xy 697.23 115.57)
+		)
+		(stroke
+			(width 0)
+			(type default)
+		)
+		(uuid "d589297d-2fe6-4d0c-8521-f79221c53e88")
+	)
+	(label "GND"
+		(at 697.23 115.57 0)
+		(effects
+			(font
+				(size 1.27 1.27)
+			)
+			(justify right bottom)
+		)
+		(uuid "4bd924bd-d3f4-4fac-9a6b-031053ef035e")
+	)
+	(wire
+		(pts
+			(xy 704.85 118.11) (xy 697.23 118.11)
+		)
+		(stroke
+			(width 0)
+			(type default)
+		)
+		(uuid "e476bc01-3207-4f75-906c-620dc1c0eb3d")
+	)
+	(label "GND"
+		(at 697.23 118.11 0)
+		(effects
+			(font
+				(size 1.27 1.27)
+			)
+			(justify right bottom)
+		)
+		(uuid "8f415cf0-3390-4256-a174-cfb5922ae53a")
+	)
+	(wire
+		(pts
+			(xy 704.85 120.65) (xy 697.23 120.65)
+		)
+		(stroke
+			(width 0)
+			(type default)
+		)
+		(uuid "188d41a6-3d61-4faf-b596-4151f8cd7971")
+	)
+	(label "GND"
+		(at 697.23 120.65 0)
+		(effects
+			(font
+				(size 1.27 1.27)
+			)
+			(justify right bottom)
+		)
+		(uuid "f8ae0127-6138-4df2-bd8d-a27dcf9411a7")
+	)
 )