Add placeholder level shifters for isolation

.gitignore

@@ -1 +1,2 @@
+.DS_Store
 gay-ipod-backups/*

audio.kicad_sch

@@ -1026,6 +1026,92 @@
         )
       )
     )
+    (symbol "symbols:TXB0106" (in_bom yes) (on_board yes)
+      (property "Reference" "U" (id 0) (at 0 -6.35 0)
+        (effects (font (size 1.27 1.27)))
+      )
+      (property "Value" "TXB0106" (id 1) (at 0 -8.89 0)
+        (effects (font (size 1.27 1.27)))
+      )
+      (property "Footprint" "" (id 2) (at -11.43 12.7 0)
+        (effects (font (size 1.27 1.27)) hide)
+      )
+      (property "Datasheet" "" (id 3) (at -11.43 12.7 0)
+        (effects (font (size 1.27 1.27)) hide)
+      )
+      (symbol "TXB0106_0_1"
+        (rectangle (start -7.62 13.97) (end 7.62 -16.51)
+          (stroke (width 0.254) (type default) (color 0 0 0 0))
+          (fill (type background))
+        )
+      )
+      (symbol "TXB0106_1_1"
+        (pin bidirectional line (at -10.16 6.35 0) (length 2.54)
+          (name "A1" (effects (font (size 1.27 1.27))))
+          (number "1" (effects (font (size 1.27 1.27))))
+        )
+        (pin bidirectional line (at 10.16 -6.35 180) (length 2.54)
+          (name "B6" (effects (font (size 1.27 1.27))))
+          (number "13" (effects (font (size 1.27 1.27))))
+        )
+        (pin bidirectional line (at 10.16 -3.81 180) (length 2.54)
+          (name "B5" (effects (font (size 1.27 1.27))))
+          (number "14" (effects (font (size 1.27 1.27))))
+        )
+        (pin power_in line (at 0 -19.05 90) (length 2.54)
+          (name "GND" (effects (font (size 1.27 1.27))))
+          (number "15" (effects (font (size 1.27 1.27))))
+        )
+        (pin power_in line (at 2.54 16.51 270) (length 2.54)
+          (name "VCCB" (effects (font (size 1.27 1.27))))
+          (number "16" (effects (font (size 1.27 1.27))))
+        )
+        (pin bidirectional line (at 10.16 -1.27 180) (length 2.54)
+          (name "B4" (effects (font (size 1.27 1.27))))
+          (number "17" (effects (font (size 1.27 1.27))))
+        )
+        (pin bidirectional line (at 10.16 1.27 180) (length 2.54)
+          (name "B3" (effects (font (size 1.27 1.27))))
+          (number "18" (effects (font (size 1.27 1.27))))
+        )
+        (pin bidirectional line (at 10.16 3.81 180) (length 2.54)
+          (name "B2" (effects (font (size 1.27 1.27))))
+          (number "19" (effects (font (size 1.27 1.27))))
+        )
+        (pin bidirectional line (at -10.16 3.81 0) (length 2.54)
+          (name "A2" (effects (font (size 1.27 1.27))))
+          (number "2" (effects (font (size 1.27 1.27))))
+        )
+        (pin bidirectional line (at 10.16 6.35 180) (length 2.54)
+          (name "B1" (effects (font (size 1.27 1.27))))
+          (number "20" (effects (font (size 1.27 1.27))))
+        )
+        (pin bidirectional line (at -10.16 1.27 0) (length 2.54)
+          (name "A3" (effects (font (size 1.27 1.27))))
+          (number "3" (effects (font (size 1.27 1.27))))
+        )
+        (pin bidirectional line (at -10.16 -1.27 0) (length 2.54)
+          (name "A4" (effects (font (size 1.27 1.27))))
+          (number "4" (effects (font (size 1.27 1.27))))
+        )
+        (pin power_in line (at -2.54 16.51 270) (length 2.54)
+          (name "VCCA" (effects (font (size 1.27 1.27))))
+          (number "5" (effects (font (size 1.27 1.27))))
+        )
+        (pin input line (at -10.16 8.89 0) (length 2.54)
+          (name "OE" (effects (font (size 1.27 1.27))))
+          (number "6" (effects (font (size 1.27 1.27))))
+        )
+        (pin bidirectional line (at -10.16 -3.81 0) (length 2.54)
+          (name "A5" (effects (font (size 1.27 1.27))))
+          (number "7" (effects (font (size 1.27 1.27))))
+        )
+        (pin bidirectional line (at -10.16 -6.35 0) (length 2.54)
+          (name "A6" (effects (font (size 1.27 1.27))))
+          (number "8" (effects (font (size 1.27 1.27))))
+        )
+      )
+    )
   )
 
   (junction (at 120.015 83.185) (diameter 0) (color 0 0 0 0)
@@ -1301,6 +1387,10 @@
     (stroke (width 0) (type default) (color 0 0 0 0))
     (uuid 335158bc-50c0-4197-929b-210ba63f8617)
   )
+  (wire (pts (xy 125.73 158.75) (xy 127.635 158.75))
+    (stroke (width 0) (type default) (color 0 0 0 0))
+    (uuid 356770e5-a1ef-4c37-8fe1-6eb2d1d477ec)
+  )
   (wire (pts (xy 185.42 65.405) (xy 165.1 65.405))
     (stroke (width 0) (type default) (color 0 0 0 0))
     (uuid 361dc56d-5438-48a0-ae55-342c444724e5)
@@ -1764,6 +1854,10 @@
     (effects (font (size 1.27 1.27)) (justify left bottom))
     (uuid 9aaca037-8bb0-4b20-857d-3e4b591d6bf5)
   )
+  (text "TODO: for off-state isolation" (at 127 148.59 0)
+    (effects (font (size 1.27 1.27)) (justify left bottom))
+    (uuid b91bfa29-406c-4381-b55f-b704487b8abb)
+  )
   (text "enables i2c mode" (at 80.645 90.805 180)
     (effects (font (size 1.27 1.27)) (justify right bottom))
     (uuid e2d04cc3-d4ae-48bc-993b-e5149dd78aeb)
@@ -1832,6 +1926,13 @@
       (effects (font (size 1.27 1.27)) (justify left) hide)
     )
   )
+  (global_label "3V3_AUDIO_EN" (shape input) (at 125.73 158.75 180) (fields_autoplaced)
+    (effects (font (size 1.27 1.27)) (justify right))
+    (uuid 93c57a7e-30e5-4732-9561-7e61714ef742)
+    (property "Intersheet References" "${INTERSHEET_REFS}" (id 0) (at 109.7702 158.8294 0)
+      (effects (font (size 1.27 1.27)) (justify right) hide)
+    )
+  )
   (global_label "ESP_SCL" (shape input) (at 83.185 75.565 180) (fields_autoplaced)
     (effects (font (size 1.27 1.27)) (justify right))
     (uuid a640b54a-88a9-4d22-979e-f8ed4ae54e4b)
@@ -2158,6 +2259,39 @@
     (pin "1" (uuid f08f1c68-e7f4-46c9-b619-ed9b579a8c99))
   )
 
+  (symbol (lib_id "symbols:TXB0106") (at 137.795 167.64 0) (unit 1)
+    (in_bom yes) (on_board yes) (fields_autoplaced)
+    (uuid 45d1d979-8eed-4a40-ac70-a27c3d6bfa27)
+    (property "Reference" "U?" (id 0) (at 139.8144 187.325 0)
+      (effects (font (size 1.27 1.27)) (justify left))
+    )
+    (property "Value" "TXB0106" (id 1) (at 139.8144 189.865 0)
+      (effects (font (size 1.27 1.27)) (justify left))
+    )
+    (property "Footprint" "" (id 2) (at 126.365 154.94 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (property "Datasheet" "" (id 3) (at 126.365 154.94 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (pin "1" (uuid cc9f3b2b-5597-472f-95dd-f92feb2158d3))
+    (pin "13" (uuid 71e91e10-aadb-463a-a218-66fb80a5db98))
+    (pin "14" (uuid 6576ceba-61aa-4037-9ef9-30936a12cf60))
+    (pin "15" (uuid 1b634f96-b248-45a6-b90d-26b4f6c883db))
+    (pin "16" (uuid a3977735-33d5-4025-bf18-f1e1bf025e37))
+    (pin "17" (uuid ee7e10c3-bbf1-4119-a9a9-0e0872c3a20a))
+    (pin "18" (uuid 5ea945ce-da62-493d-b819-127ad4c629b3))
+    (pin "19" (uuid ec7cae64-2d27-4663-ad7e-1084067add4a))
+    (pin "2" (uuid a9f22e03-442e-4aa1-bf09-7185d98b8c31))
+    (pin "20" (uuid 8306e952-fa5d-45a3-8517-9c9be96e44d4))
+    (pin "3" (uuid 9783af23-b7b8-4e36-848f-d88eb717d300))
+    (pin "4" (uuid 7d3d7932-9a40-4d31-870d-c0d04d3f8c06))
+    (pin "5" (uuid b0fd6e42-9f3a-450a-9e02-f4b0c5d3fab5))
+    (pin "6" (uuid b11db0df-775e-4d8f-916b-0d53a872bc08))
+    (pin "7" (uuid ca3abbf3-537b-48a9-ada3-71add31a8470))
+    (pin "8" (uuid 15645d09-7937-422b-9337-36f23f68ed0b))
+  )
+
   (symbol (lib_id "Transistor_FET:2N7002") (at 34.29 177.8 90) (mirror x) (unit 1)
     (in_bom yes) (on_board yes)
     (uuid 54c2eb53-b2b5-46b8-993d-c94e38dc7baa)

gay-ipod.kicad_prl

@@ -1,6 +1,6 @@
 {
   "board": {
-    "active_layer": 37,
+    "active_layer": 0,
     "active_layer_preset": "",
     "auto_track_width": true,
     "hidden_nets": [],

gay-ipod.kicad_pro

@@ -109,16 +109,16 @@
         "allow_microvias": false,
         "max_error": 0.005,
         "min_clearance": 0.15,
-        "min_copper_edge_clearance": 0.0,
+        "min_copper_edge_clearance": 0.3,
-        "min_hole_clearance": 0.25,
+        "min_hole_clearance": 0.125,
         "min_hole_to_hole": 0.25,
         "min_microvia_diameter": 0.19999999999999998,
         "min_microvia_drill": 0.09999999999999999,
         "min_silk_clearance": 0.0,
-        "min_through_hole_diameter": 0.254,
+        "min_through_hole_diameter": 0.19999999999999998,
-        "min_track_width": 0.15239999999999998,
+        "min_track_width": 0.15,
-        "min_via_annular_width": 0.127,
+        "min_via_annular_width": 0.19999999999999998,
-        "min_via_diameter": 0.508,
+        "min_via_diameter": 0.39999999999999997,
         "solder_mask_clearance": 0.0,
         "solder_mask_min_width": 0.0,
         "use_height_for_length_calcs": true
@@ -136,8 +136,8 @@
           "drill": 0.0
         },
         {
-          "diameter": 0.508,
+          "diameter": 0.6,
-          "drill": 0.254
+          "drill": 0.2
         },
         {
           "diameter": 0.762,

gay-ipod.kicad_sch

@@ -1002,6 +1002,92 @@
         )
       )
     )
+    (symbol "symbols:TXB0106" (in_bom yes) (on_board yes)
+      (property "Reference" "U" (id 0) (at 0 -6.35 0)
+        (effects (font (size 1.27 1.27)))
+      )
+      (property "Value" "TXB0106" (id 1) (at 0 -8.89 0)
+        (effects (font (size 1.27 1.27)))
+      )
+      (property "Footprint" "" (id 2) (at -11.43 12.7 0)
+        (effects (font (size 1.27 1.27)) hide)
+      )
+      (property "Datasheet" "" (id 3) (at -11.43 12.7 0)
+        (effects (font (size 1.27 1.27)) hide)
+      )
+      (symbol "TXB0106_0_1"
+        (rectangle (start -7.62 13.97) (end 7.62 -16.51)
+          (stroke (width 0.254) (type default) (color 0 0 0 0))
+          (fill (type background))
+        )
+      )
+      (symbol "TXB0106_1_1"
+        (pin bidirectional line (at -10.16 6.35 0) (length 2.54)
+          (name "A1" (effects (font (size 1.27 1.27))))
+          (number "1" (effects (font (size 1.27 1.27))))
+        )
+        (pin bidirectional line (at 10.16 -6.35 180) (length 2.54)
+          (name "B6" (effects (font (size 1.27 1.27))))
+          (number "13" (effects (font (size 1.27 1.27))))
+        )
+        (pin bidirectional line (at 10.16 -3.81 180) (length 2.54)
+          (name "B5" (effects (font (size 1.27 1.27))))
+          (number "14" (effects (font (size 1.27 1.27))))
+        )
+        (pin power_in line (at 0 -19.05 90) (length 2.54)
+          (name "GND" (effects (font (size 1.27 1.27))))
+          (number "15" (effects (font (size 1.27 1.27))))
+        )
+        (pin power_in line (at 2.54 16.51 270) (length 2.54)
+          (name "VCCB" (effects (font (size 1.27 1.27))))
+          (number "16" (effects (font (size 1.27 1.27))))
+        )
+        (pin bidirectional line (at 10.16 -1.27 180) (length 2.54)
+          (name "B4" (effects (font (size 1.27 1.27))))
+          (number "17" (effects (font (size 1.27 1.27))))
+        )
+        (pin bidirectional line (at 10.16 1.27 180) (length 2.54)
+          (name "B3" (effects (font (size 1.27 1.27))))
+          (number "18" (effects (font (size 1.27 1.27))))
+        )
+        (pin bidirectional line (at 10.16 3.81 180) (length 2.54)
+          (name "B2" (effects (font (size 1.27 1.27))))
+          (number "19" (effects (font (size 1.27 1.27))))
+        )
+        (pin bidirectional line (at -10.16 3.81 0) (length 2.54)
+          (name "A2" (effects (font (size 1.27 1.27))))
+          (number "2" (effects (font (size 1.27 1.27))))
+        )
+        (pin bidirectional line (at 10.16 6.35 180) (length 2.54)
+          (name "B1" (effects (font (size 1.27 1.27))))
+          (number "20" (effects (font (size 1.27 1.27))))
+        )
+        (pin bidirectional line (at -10.16 1.27 0) (length 2.54)
+          (name "A3" (effects (font (size 1.27 1.27))))
+          (number "3" (effects (font (size 1.27 1.27))))
+        )
+        (pin bidirectional line (at -10.16 -1.27 0) (length 2.54)
+          (name "A4" (effects (font (size 1.27 1.27))))
+          (number "4" (effects (font (size 1.27 1.27))))
+        )
+        (pin power_in line (at -2.54 16.51 270) (length 2.54)
+          (name "VCCA" (effects (font (size 1.27 1.27))))
+          (number "5" (effects (font (size 1.27 1.27))))
+        )
+        (pin input line (at -10.16 8.89 0) (length 2.54)
+          (name "OE" (effects (font (size 1.27 1.27))))
+          (number "6" (effects (font (size 1.27 1.27))))
+        )
+        (pin bidirectional line (at -10.16 -3.81 0) (length 2.54)
+          (name "A5" (effects (font (size 1.27 1.27))))
+          (number "7" (effects (font (size 1.27 1.27))))
+        )
+        (pin bidirectional line (at -10.16 -6.35 0) (length 2.54)
+          (name "A6" (effects (font (size 1.27 1.27))))
+          (number "8" (effects (font (size 1.27 1.27))))
+        )
+      )
+    )
   )
 
   (junction (at 97.155 104.775) (diameter 0) (color 0 0 0 0)
@@ -1552,6 +1638,10 @@
     (effects (font (size 1.27 1.27)) (justify right bottom))
     (uuid a89f0a36-b051-4b29-a331-301cec491651)
   )
+  (text "TODO: for off-state isolation" (at 210.185 43.815 0)
+    (effects (font (size 1.27 1.27)) (justify left bottom))
+    (uuid c1aa635b-61f2-4321-82b6-4541ecefb317)
+  )
   (text "SPI" (at 191.77 78.105 90)
     (effects (font (size 1.27 1.27)) (justify left bottom))
     (uuid cb6d6727-bd96-4a50-a31a-dbaa85c9eb35)
@@ -1628,6 +1718,13 @@
       (effects (font (size 1.27 1.27)) (justify right) hide)
     )
   )
+  (global_label "DISPLAY_EN" (shape input) (at 213.995 51.435 180) (fields_autoplaced)
+    (effects (font (size 1.27 1.27)) (justify right))
+    (uuid 322fd2d6-f937-42cc-b145-9e42af907610)
+    (property "Intersheet References" "${INTERSHEET_REFS}" (id 0) (at 200.5752 51.3556 0)
+      (effects (font (size 1.27 1.27)) (justify right) hide)
+    )
+  )
   (global_label "DAC_LRCK" (shape input) (at 74.295 97.79 0) (fields_autoplaced)
     (effects (font (size 1.27 1.27)) (justify left))
     (uuid 389324b5-027a-476f-93bf-f91faf2e7805)
@@ -2530,6 +2627,39 @@
     (pin "1" (uuid bf6feec9-b599-4f49-b5c2-1cbeda3d9c84))
   )
 
+  (symbol (lib_id "symbols:TXB0106") (at 224.155 60.325 0) (unit 1)
+    (in_bom yes) (on_board yes) (fields_autoplaced)
+    (uuid c1149666-8c72-4d65-8899-1e1c72f1350f)
+    (property "Reference" "U?" (id 0) (at 226.1744 80.01 0)
+      (effects (font (size 1.27 1.27)) (justify left))
+    )
+    (property "Value" "TXB0106" (id 1) (at 226.1744 82.55 0)
+      (effects (font (size 1.27 1.27)) (justify left))
+    )
+    (property "Footprint" "" (id 2) (at 212.725 47.625 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (property "Datasheet" "" (id 3) (at 212.725 47.625 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (pin "1" (uuid 1c4d19bc-5460-4114-9c57-3b327be3508a))
+    (pin "13" (uuid c54c134c-0ce6-4ba1-847a-4abb7c856f46))
+    (pin "14" (uuid b48dbe4d-d0b6-4502-8a8e-254497f0ad33))
+    (pin "15" (uuid 3de03a96-a3dd-4474-8fc2-9dffd7f218c8))
+    (pin "16" (uuid aa8f45e1-92c0-4a56-9ba7-cdf5839ba4cb))
+    (pin "17" (uuid ce11fdd3-a7b8-43a3-ba32-3e9f12369947))
+    (pin "18" (uuid c76327ee-5234-44e1-9dc0-be9edebd0444))
+    (pin "19" (uuid 0653aa42-3be1-4fff-9b74-c98b8dc23066))
+    (pin "2" (uuid 356d7515-5209-44fe-884b-2f0cd29801b3))
+    (pin "20" (uuid 717b71ab-9953-45d4-ac4c-f397995b5b52))
+    (pin "3" (uuid 42515462-c075-4f17-b0d2-b8239b374135))
+    (pin "4" (uuid 86b6dfcc-ec7d-4763-8052-896ed1707bb5))
+    (pin "5" (uuid 5508ce7d-78a7-4f74-b9a6-7c4c433573fc))
+    (pin "6" (uuid a056b69d-a6c7-47e5-a7a4-6fc367c66bee))
+    (pin "7" (uuid e48e0af8-b09a-4cc0-baa7-df308f74d575))
+    (pin "8" (uuid 9a622f23-c8d4-461a-91a5-2c6d27fd6bb5))
+  )
+
   (symbol (lib_id "power:+3V3") (at 59.055 33.02 0) (unit 1)
     (in_bom yes) (on_board yes) (fields_autoplaced)
     (uuid cd9cbd72-eafd-4ed3-86f9-fd5881893c86)
@@ -3333,6 +3463,12 @@
     (path "/a46377c2-b5e0-47a0-ab83-f2feb3bc1f6a/1d38fc78-d0b7-419c-9186-2a9df74149ea"
       (reference "U405") (unit 1) (value "TS3A27518EPW") (footprint "Package_SO:TSSOP-24_4.4x7.8mm_P0.65mm")
     )
+    (path "/aa634b70-9cb7-4291-a4a8-f65abc12d546/45d1d979-8eed-4a40-ac70-a27c3d6bfa27"
+      (reference "U?") (unit 1) (value "TXB0106") (footprint "")
+    )
+    (path "/c1149666-8c72-4d65-8899-1e1c72f1350f"
+      (reference "U?") (unit 1) (value "TXB0106") (footprint "")
+    )
     (path "/dd908545-4182-4f25-9063-edf44042bd71"
       (reference "Y101") (unit 1) (value "32.768 kHz") (footprint "Crystal:Crystal_SMD_2012-2Pin_2.0x1.2mm")
     )

storage.kicad_sch

@@ -3632,7 +3632,7 @@
     (property "Datasheet" "" (id 3) (at 100.33 54.61 0)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "PN" "ESD7016" (id 4) (at 100.33 54.61 0)
+    (property "PN" "BD91N01NUX" (id 4) (at 100.33 54.61 0)
       (effects (font (size 1.27 1.27)) hide)
     )
     (pin "1" (uuid 65b2f072-044d-408b-9ae5-66bdfab59d5e))

symbols.kicad_sym

@@ -1213,6 +1213,92 @@
       )
     )
   )
+  (symbol "TXB0106" (in_bom yes) (on_board yes)
+    (property "Reference" "U" (id 0) (at 0 -6.35 0)
+      (effects (font (size 1.27 1.27)))
+    )
+    (property "Value" "TXB0106" (id 1) (at 0 -8.89 0)
+      (effects (font (size 1.27 1.27)))
+    )
+    (property "Footprint" "" (id 2) (at -11.43 12.7 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (property "Datasheet" "" (id 3) (at -11.43 12.7 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (symbol "TXB0106_0_1"
+      (rectangle (start -7.62 13.97) (end 7.62 -16.51)
+        (stroke (width 0.254) (type default) (color 0 0 0 0))
+        (fill (type background))
+      )
+    )
+    (symbol "TXB0106_1_1"
+      (pin bidirectional line (at -10.16 6.35 0) (length 2.54)
+        (name "A1" (effects (font (size 1.27 1.27))))
+        (number "1" (effects (font (size 1.27 1.27))))
+      )
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