USB: Add diode to prevent voltage out on USB-C

Signed-off-by: Dominik Sliwa <[email protected]>

Author: randomplum

USB.kicad_sch

@@ -7,7 +7,7 @@
   (title_block
     (title "USB 2.0 host/USB 2.0 device")
     (date "2022-11-06")
-    (rev "1.3b")
+    (rev "1.3e")
     (company "Nabu Casa")
     (comment 1 "www.nabucasa.com")
     (comment 2 "Yellow")
@@ -2418,9 +2418,9 @@
     )
   )
 
+  (bus_alias "I2C" (members "SDA" "SCL"))
   (bus_alias "CM4_USB" (members "CM4_USB_D+" "CM4_USB_D-" "CM4_USB_OTG_ID"))
   (bus_alias "USB" (members "D+" "D-"))
-  (bus_alias "I2C" (members "SDA" "SCL"))
   (junction (at 215.265 71.12) (diameter 0.9144) (color 0 0 0 0)
     (uuid 00d35d35-a124-4754-a19e-a3136e64fbfa)
   )
@@ -3231,7 +3231,7 @@
     (stroke (width 0) (type solid))
     (uuid 4a437569-507e-4735-a30b-8a40f5de183d)
   )
-  (wire (pts (xy 173.99 179.07) (xy 165.1 179.07))
+  (wire (pts (xy 171.45 179.07) (xy 165.1 179.07))
     (stroke (width 0) (type solid))
     (uuid 4a471399-c5d1-4cc2-876d-2e0b615bb1e5)
   )
@@ -3953,6 +3953,10 @@
     (stroke (width 0) (type solid))
     (uuid d680554f-cc91-428d-8a88-b6576491cfe8)
   )
+  (wire (pts (xy 133.35 125.73) (xy 138.43 125.73))
+    (stroke (width 0) (type default))
+    (uuid d7b0207d-4338-4764-8dfe-f702304a6a05)
+  )
   (wire (pts (xy 167.64 39.37) (xy 180.34 39.37))
     (stroke (width 0) (type solid))
     (uuid d8372bab-2a60-4aea-9b41-1dccea205890)
@@ -4096,7 +4100,7 @@
     (stroke (width 0) (type solid))
     (uuid ef93ad75-f8cc-4963-b7f2-8cb09c704314)
   )
-  (wire (pts (xy 129.54 125.73) (xy 138.43 125.73))
+  (wire (pts (xy 114.3 125.73) (xy 128.27 125.73))
     (stroke (width 0) (type solid))
     (uuid efbf6fda-6f19-4dda-8e5a-90bcfbe5538f)
   )
@@ -4232,10 +4236,6 @@
     (effects (font (size 1.27 1.27)) (justify left bottom))
     (uuid 0995beb5-347a-4f9c-8bb0-906998badb77)
   )
-  (label "VBUS_{IN}" (at 173.99 179.07 180) (fields_autoplaced)
-    (effects (font (size 1.27 1.27)) (justify right bottom))
-    (uuid 09c260da-1d71-4bfd-8e5c-cc58e1ee25bf)
-  )
   (label "CP.D+" (at 59.69 58.42 0) (fields_autoplaced)
     (effects (font (size 1.27 1.27)) (justify left bottom))
     (uuid 0a2c20e5-c565-49c1-a131-50cd443c0393)
@@ -4296,6 +4296,10 @@
     (effects (font (size 1.27 1.27)) (justify left bottom))
     (uuid 33038323-15b5-49f7-ab98-35ffac3eb012)
   )
+  (label "VBUS" (at 133.35 125.73 0) (fields_autoplaced)
+    (effects (font (size 1.27 1.27)) (justify left bottom))
+    (uuid 3612b0d6-9965-4e25-8d64-185ddd26a90c)
+  )
   (label "USB-C.D+" (at 125.73 144.78 0) (fields_autoplaced)
     (effects (font (size 1.27 1.27)) (justify left bottom))
     (uuid 3b5a24b5-f815-4762-97c8-be1bab141c1d)
@@ -4320,7 +4324,7 @@
     (effects (font (size 1.27 1.27)) (justify left bottom))
     (uuid 52728d42-1b39-4c3a-926b-90e60c1dfd80)
   )
-  (label "VBUS_{IN}" (at 129.54 125.73 0) (fields_autoplaced)
+  (label "VBUS_{IN}" (at 114.3 125.73 0) (fields_autoplaced)
     (effects (font (size 1.27 1.27)) (justify left bottom))
     (uuid 52fe7725-16da-441b-a5eb-4584a623da56)
   )
@@ -4344,6 +4348,10 @@
     (effects (font (size 1.27 1.27)) (justify right bottom))
     (uuid 616e3862-7097-4847-a63f-9811cba543e4)
   )
+  (label "VBUS" (at 171.45 179.07 180) (fields_autoplaced)
+    (effects (font (size 1.27 1.27)) (justify right bottom))
+    (uuid 6265d3b5-43ee-468f-bc88-ae7086aa314c)
+  )
   (label "USB0.D+" (at 180.34 44.45 180) (fields_autoplaced)
     (effects (font (size 1.27 1.27)) (justify right bottom))
     (uuid 66055b19-78cf-4236-a673-8374dfde6c5f)
@@ -5528,12 +5536,12 @@
     (pin "2" (uuid c401c8e2-0382-4889-9184-7f73b71e8f76))
     (pin "3" (uuid 8b07577d-47f3-43a3-9526-902df9bbf607))
     (pin "4" (uuid 950cf0c6-dc16-4147-9187-b83edf8563a8))
-    (pin "9" (uuid 7b0b4e01-6b4a-4112-bb13-d5412823b9fc))
+    (pin "9" (uuid 7b0b4e01-6b4a-4112-bb13-d5412823b9fd))
     (pin "5" (uuid b7dbde41-cd4a-4361-a041-a422ea177cc5))
     (pin "6" (uuid 5bbfac04-8a57-4f33-8344-e5c2233ebf24))
     (pin "7" (uuid 5629f661-91ba-4482-92f9-563bc43b0660))
     (pin "8" (uuid 4f1c4753-9e5e-410e-821e-52efe15cf90a))
-    (pin "9" (uuid 7b0b4e01-6b4a-4112-bb13-d5412823b9fc))
+    (pin "9" (uuid 7b0b4e01-6b4a-4112-bb13-d5412823b9fd))
     (instances
       (project "Yellow"
         (path "/abc482bd-3f17-4d35-80db-1da3dcdb5c27/aa1d8d83-5167-420c-9ee7-3e4dcc942bfc"
@@ -5699,8 +5707,8 @@
     (pin "2" (uuid 4934dc5c-5380-455d-ae19-6e24d9bfceb5))
     (pin "3" (uuid 729ac378-dce4-4df9-9bf1-e8016771d36d))
     (pin "4" (uuid e4ee4232-6f40-426c-90f1-7eba2ae8f6f9))
-    (pin "5" (uuid 74619864-2e66-4d77-8dea-82d40bdf54e4))
-    (pin "5" (uuid 74619864-2e66-4d77-8dea-82d40bdf54e4))
+    (pin "5" (uuid 74619864-2e66-4d77-8dea-82d40bdf54e5))
+    (pin "5" (uuid 74619864-2e66-4d77-8dea-82d40bdf54e5))
     (pin "6" (uuid 859581d4-43af-4391-b60d-17abe81465d4))
     (pin "7" (uuid 3c49b464-5158-4723-9673-90a35b2f17b5))
     (pin "8" (uuid f20f6f01-9336-44ee-88a8-0238647d91d6))
@@ -6490,6 +6498,38 @@
     )
   )
 
+  (symbol (lib_id "Device:D_Schottky_Small") (at 130.81 125.73 0) (mirror x) (unit 1)
+    (in_bom yes) (on_board yes) (dnp no)
+    (uuid ced84dbe-ac1a-45e4-8a1c-2f6d65b828e1)
+    (property "Reference" "D31" (at 130.81 123.444 0)
+      (effects (font (size 1.27 1.27)))
+    )
+    (property "Value" "CDBQR0130L" (at 130.81 121.412 0)
+      (effects (font (size 1.27 1.27)))
+    )
+    (property "Footprint" "Diode_SMD:D_0402_1005Metric" (at 130.81 125.73 90)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (property "Datasheet" "https://www.comchiptech.com/admin/files/product/CDBQR0130L-HF-RevD.pdf" (at 130.81 125.73 90)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (property "Manufacturer" "Comchip Technology" (at 130.81 125.73 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (property "PartNumber" "CDBQR0130L" (at 130.81 125.73 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (pin "1" (uuid 099fb4aa-5544-404f-82a6-ab0009cfec8a))
+    (pin "2" (uuid 3ac9b68c-3f9b-4fa2-a22e-65728c7ecc92))
+    (instances
+      (project "Yellow"
+        (path "/abc482bd-3f17-4d35-80db-1da3dcdb5c27/aa1d8d83-5167-420c-9ee7-3e4dcc942bfc"
+          (reference "D31") (unit 1)
+        )
+      )
+    )
+  )
+
   (symbol (lib_id "Device:C_Small") (at 40.64 83.82 0) (unit 1)
     (in_bom yes) (on_board yes) (dnp no)
     (uuid d146055c-8aa8-48a7-afc9-ad76e69a2a0a)