FPGA direct-to-pin Hackish USB transciver 27 ohm + 3.6 V zener

README.md

@@ -70,7 +70,7 @@ section (thicker power lines, separately routed feedback)
     [x] Compile differential GPDI output
     [ ] Connect more lines from ESP-32 to FPGA
     [x] Connect FPGA USB D+/D- with 1.5k pullup in USB 1.1 (full speed) mode
-    [ ] FPGA USB add 27 ohm + 3.6 V zener
+    [x] FPGA USB add 27 ohm + 3.6 V zener
     [x] Symmetrically place USB connectors left-right 
     [ ] Jumpers to switch 2.5V/3.3V for left IO banks
     [x] External JTAG header

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 F 2 "" H 9050 2550 50  0000 C CNN
 F 3 "" H 9050 2550 50  0000 C CNN
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 $Comp
-L +3V3 #PWR0127
+L +3V3 #PWR0128
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-F 0 "#PWR0127" H 9250 2400 50  0001 C CNN
+F 0 "#PWR0128" H 9250 2400 50  0001 C CNN
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 F 2 "" H 9250 2550 50  0000 C CNN
 F 3 "" H 9250 2550 50  0000 C CNN
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 	1    0    0    -1  
 $EndComp
 $Comp
-L +3V3 #PWR0128
+L +3V3 #PWR0129
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+F 0 "#PWR0129" H 5650 2800 50  0001 C CNN
 F 1 "+3V3" H 5650 3090 50  0000 C CNN
 F 2 "" H 5650 2950 50  0000 C CNN
 F 3 "" H 5650 2950 50  0000 C CNN
@@ -423,10 +423,10 @@ F 3 "" H 5650 2950 50  0000 C CNN
 	0    -1   -1   0   
 $EndComp
 $Comp
-L +3V3 #PWR0129
+L +3V3 #PWR0130
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 F 1 "+3V3" H 5650 2690 50  0000 C CNN
 F 2 "" H 5650 2550 50  0000 C CNN
 F 3 "" H 5650 2550 50  0000 C CNN
@@ -434,10 +434,10 @@ F 3 "" H 5650 2550 50  0000 C CNN
 	0    -1   -1   0   
 $EndComp
 $Comp
-L +3V3 #PWR0130
+L +3V3 #PWR0131
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-F 0 "#PWR0130" H 7150 2400 50  0001 C CNN
+F 0 "#PWR0131" H 7150 2400 50  0001 C CNN
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gpio.bak

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-Text GLabel 4200 2700 0    60   Input ~ 0
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+SW2
+Text GLabel 4200 2700 0    60   Input ~ 0
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ram.bak

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 $Comp
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-F 0 "#PWR096" H 5250 1850 50  0001 C CNN
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 F 2 "" H 5250 2000 50  0000 C CNN
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 $EndComp
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-L +3V3 #PWR097
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-F 0 "#PWR097" H 5550 1850 50  0001 C CNN
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 $Comp
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-F 0 "#PWR098" H 5250 4750 50  0001 C CNN
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 F 2 "" H 5250 5000 50  0000 C CNN
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 $EndComp
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-L GND #PWR099
+L GND #PWR0100
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-F 0 "#PWR099" H 5550 4750 50  0001 C CNN
+F 0 "#PWR0100" H 5550 4750 50  0001 C CNN
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 $EndComp
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-L GND #PWR0100
+L GND #PWR0101
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-F 0 "#PWR0100" H 5350 5800 50  0001 C CNN
+F 0 "#PWR0101" H 5350 5800 50  0001 C CNN
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-L +3V3 #PWR0101
+L +3V3 #PWR0102
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-F 0 "#PWR0101" H 5350 5600 50  0001 C CNN
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ram.sch

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 Connection ~ 5250 2100
 $Comp
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-F 0 "#PWR096" H 5250 1850 50  0001 C CNN
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-F 0 "#PWR097" H 5550 1850 50  0001 C CNN
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 $Comp
-L GND #PWR098
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-F 0 "#PWR098" H 5250 4750 50  0001 C CNN
+F 0 "#PWR099" H 5250 4750 50  0001 C CNN
 F 1 "GND" H 5250 4850 50  0000 C CNN
 F 2 "" H 5250 5000 50  0000 C CNN
 F 3 "" H 5250 5000 50  0000 C CNN
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 	1    0    0    -1  
 $EndComp
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-L GND #PWR099
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 F 3 "" H 5550 5000 50  0000 C CNN
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-L GND #PWR0100
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sdcard.bak

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-L GND #PWR0111
+L GND #PWR0112
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-F 0 "#PWR0111" H 5800 3700 50  0001 C CNN
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 F 1 "GND" H 5800 3800 50  0000 C CNN
 F 2 "" H 5800 3950 50  0000 C CNN
 F 3 "" H 5800 3950 50  0000 C CNN
@@ -76,10 +76,10 @@ F 3 "" H 5800 3950 50  0000 C CNN
 	1    0    0    -1  
 $EndComp
 $Comp
-L +3V3 #PWR0112
+L +3V3 #PWR0113
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-F 0 "#PWR0112" H 3150 2800 50  0001 C CNN
+F 0 "#PWR0113" H 3150 2800 50  0001 C CNN
 F 1 "+3V3" H 3150 3090 50  0000 C CNN
 F 2 "" H 3150 2950 50  0000 C CNN
 F 3 "" H 3150 2950 50  0000 C CNN
@@ -112,10 +112,10 @@ F 3 "" H 3150 3100 50  0000 C CNN
 	-1   0    0    1   
 $EndComp
 $Comp
-L GND #PWR0113
+L GND #PWR0114
 U 1 1 590C5E90
 P 3150 3650
-F 0 "#PWR0113" H 3150 3400 50  0001 C CNN
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 F 1 "GND" H 3150 3500 50  0000 C CNN
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sdcard.sch

@@ -54,10 +54,10 @@ Comment3 ""
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-L GND #PWR0110
+L GND #PWR0111
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-F 0 "#PWR0110" H 3550 3400 50  0001 C CNN
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 	1    0    0    -1  
 $EndComp
 $Comp
-L GND #PWR0111
+L GND #PWR0112
 U 1 1 58DA7C71
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-F 0 "#PWR0111" H 5800 3700 50  0001 C CNN
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 F 1 "GND" H 5800 3800 50  0000 C CNN
 F 2 "" H 5800 3950 50  0000 C CNN
 F 3 "" H 5800 3950 50  0000 C CNN
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 	1    0    0    -1  
 $EndComp
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-L +3V3 #PWR0112
+L +3V3 #PWR0113
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 P 3150 2950
-F 0 "#PWR0112" H 3150 2800 50  0001 C CNN
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 F 1 "+3V3" H 3150 3090 50  0000 C CNN
 F 2 "" H 3150 2950 50  0000 C CNN
 F 3 "" H 3150 2950 50  0000 C CNN
@@ -112,10 +112,10 @@ F 3 "" H 3150 3100 50  0000 C CNN
 	-1   0    0    1   
 $EndComp
 $Comp
-L GND #PWR0113
+L GND #PWR0114
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-F 0 "#PWR0113" H 3150 3400 50  0001 C CNN
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 F 3 "" H 3150 3650 50  0000 C CNN

ulx3s-cache.lib

@@ -459,6 +459,29 @@ X A 2 100 0 70 L 50 50 1 1 P
 ENDDRAW
 ENDDEF
 #
+# D_Zener_Small_ALT
+#
+DEF D_Zener_Small_ALT D 0 10 N N 1 F N
+F0 "D" 0 90 50 H V C CNN
+F1 "D_Zener_Small_ALT" 0 -90 50 H V C CNN
+F2 "" 0 0 50 V I C CNN
+F3 "" 0 0 50 V I C CNN
+$FPLIST
+ TO-???*
+ *SingleDiode
+ *_Diode_*
+ *SingleDiode*
+ D_*
+$ENDFPLIST
+DRAW
+P 2 0 1 0 30 0 -30 0 N
+P 3 0 1 0 -10 40 -30 40 -30 -40 N
+P 4 0 1 0 30 40 -30 0 30 -40 30 40 F
+X K 1 -100 0 70 R 50 50 1 1 P
+X A 2 100 0 70 L 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
 # ESP-32S
 #
 DEF ESP-32S U 0 40 Y Y 1 F N

usb.bak

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-P 2650 1700
-F 0 "D8" H 2600 1780 50  0000 L CNN
-F 1 "2A" H 2600 1600 50  0000 L CNN
-F 2 "SMD_Packages:SMD-1206_Pol" V 2650 1700 60  0001 C CNN
-F 3 "" V 2650 1700 60  0000 C CNN
-	1    2650 1700
+P 2300 1700
+F 0 "D8" H 2350 1650 50  0000 L CNN
+F 1 "2A" H 2150 1650 50  0000 L CNN
+F 2 "SMD_Packages:SMD-1206_Pol" V 2300 1700 60  0001 C CNN
+F 3 "" V 2300 1700 60  0000 C CNN
+	1    2300 1700
 	-1   0    0    1   
 $EndComp
 $Comp
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 $Comp
 L D_Schottky_Small D9
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-P 2650 2650
-F 0 "D9" H 2600 2730 50  0000 L CNN
-F 1 "2A" H 2600 2550 50  0000 L CNN
-F 2 "SMD_Packages:SMD-1206_Pol" V 2650 2650 60  0001 C CNN
-F 3 "" V 2650 2650 60  0000 C CNN
-	1    2650 2650
+P 2600 2650
+F 0 "D9" H 2450 2700 50  0000 L CNN
+F 1 "2A" H 2650 2700 50  0000 L CNN
+F 2 "SMD_Packages:SMD-1206_Pol" V 2600 2650 60  0001 C CNN
+F 3 "" V 2600 2650 60  0000 C CNN
+	1    2600 2650
 	1    0    0    -1  
 $EndComp
 $Comp
 L +5V #PWR080
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-P 2850 2650
-F 0 "#PWR080" H 2850 2500 50  0001 C CNN
-F 1 "+5V" H 2850 2790 50  0000 C CNN
-F 2 "" H 2850 2650 60  0000 C CNN
-F 3 "" H 2850 2650 60  0000 C CNN
-	1    2850 2650
+P 2950 2650
+F 0 "#PWR080" H 2950 2500 50  0001 C CNN
+F 1 "+5V" H 2950 2790 50  0000 C CNN
+F 2 "" H 2950 2650 60  0000 C CNN
+F 3 "" H 2950 2650 60  0000 C CNN
+	1    2950 2650
 	0    1    1    0   
 $EndComp
 $Comp
@@ -126,32 +126,32 @@ $EndComp
 $Comp
 L GND #PWR081
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-P 1900 2100
-F 0 "#PWR081" H 1900 1850 50  0001 C CNN
-F 1 "GND" H 1900 1950 50  0000 C CNN
-F 2 "" H 1900 2100 50  0000 C CNN
-F 3 "" H 1900 2100 50  0000 C CNN
-	1    1900 2100
+P 1850 2100
+F 0 "#PWR081" H 1850 1850 50  0001 C CNN
+F 1 "GND" H 1850 1950 50  0000 C CNN
+F 2 "" H 1850 2100 50  0000 C CNN
+F 3 "" H 1850 2100 50  0000 C CNN
+	1    1850 2100
 	0    -1   -1   0   
 $EndComp
 $Comp
 L GND #PWR082
 U 1 1 58D6C843
-P 1900 3050
-F 0 "#PWR082" H 1900 2800 50  0001 C CNN
-F 1 "GND" H 1900 2900 50  0000 C CNN
-F 2 "" H 1900 3050 50  0000 C CNN
-F 3 "" H 1900 3050 50  0000 C CNN
-	1    1900 3050
+P 1850 3050
+F 0 "#PWR082" H 1850 2800 50  0001 C CNN
+F 1 "GND" H 1850 2900 50  0000 C CNN
+F 2 "" H 1850 3050 50  0000 C CNN
+F 3 "" H 1850 3050 50  0000 C CNN
+	1    1850 3050
 	0    -1   -1   0   
 $EndComp
 Text GLabel 3000 1800 2    60   Input ~ 0
 USB_FTDI_D-
 Text GLabel 3000 1900 2    60   Input ~ 0
 USB_FTDI_D+
-Text GLabel 1850 2750 2    60   Input ~ 0
+Text GLabel 3150 2750 2    60   Input ~ 0
 USB_FPGA_D-
-Text GLabel 1850 2850 2    60   Input ~ 0
+Text GLabel 3150 2850 2    60   Input ~ 0
 USB_FPGA_D+
 NoConn ~ 1850 2950
 NoConn ~ 1850 2000
@@ -254,25 +254,25 @@ F 3 "" H 5600 2500 50  0000 C CNN
 	1    0    0    -1  
 $EndComp
 Wire Wire Line
-	1800 1700 2550 1700
+	1800 1700 2200 1700
 Wire Wire Line
-	2750 1700 2800 1700
+	2400 1700 2800 1700
 Wire Wire Line
-	2750 2650 2850 2650
+	2700 2650 2950 2650
 Wire Wire Line
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+	1800 2650 2500 2650
 Wire Wire Line
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 Wire Wire Line
-	1800 3050 1900 3050
+	1800 3050 1850 3050
 Wire Wire Line
 	1800 1800 2150 1800
 Wire Wire Line
 	1800 1900 2150 1900
 Wire Wire Line
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+	1800 2750 2450 2750
 Wire Wire Line
-	1800 2850 1850 2850
+	1800 2850 2450 2850
 Wire Wire Line
 	1800 2950 1850 2950
 Wire Wire Line
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 Connection ~ 4900 2800
 Text Notes 7400 4750 0    60   ~ 0
 ujprog pinmap\nTCK = DSR\nTMS = RI\nTDI = CTS\nTDO = DCD\n
-Text GLabel 1950 3850 2    60   Input ~ 0
-USB_FPGA_D+
 $Comp
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-P 1850 3650
-F 0 "R40" V 1930 3650 50  0000 C CNN
-F 1 "1.5k" V 1850 3650 50  0000 C CNN
-F 2 "Resistors_SMD:R_0603_HandSoldering" V 1780 3650 50  0001 C CNN
-F 3 "" H 1850 3650 50  0000 C CNN
-	1    1850 3650
+P 2900 2450
+F 0 "R40" V 2980 2450 50  0000 C CNN
+F 1 "1.5k" V 2900 2450 50  0000 C CNN
+F 2 "Resistors_SMD:R_0603_HandSoldering" V 2830 2450 50  0001 C CNN
+F 3 "" H 2900 2450 50  0000 C CNN
+	1    2900 2450
 	-1   0    0    1   
 $EndComp
-Wire Wire Line
-	1850 3800 1850 3850
-Wire Wire Line
-	1850 3850 1950 3850
 $Comp
 L +3V3 #PWR087
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-P 1850 3500
-F 0 "#PWR087" H 1850 3350 50  0001 C CNN
-F 1 "+3V3" H 1850 3640 50  0000 C CNN
-F 2 "" H 1850 3500 50  0000 C CNN
-F 3 "" H 1850 3500 50  0000 C CNN
-	1    1850 3500
+P 2900 2300
+F 0 "#PWR087" H 2900 2150 50  0001 C CNN
+F 1 "+3V3" H 2900 2440 50  0000 C CNN
+F 2 "" H 2900 2300 50  0000 C CNN
+F 3 "" H 2900 2300 50  0000 C CNN
+	1    2900 2300
 	1    0    0    -1  
 $EndComp
-Text Notes 1400 4050 0    60   ~ 0
-D+ pullp for full speed mode USB1.1
+Text Notes 3000 2550 0    60   ~ 0
+D+ pullp for \nfull speed \nmode USB1.1
 Text GLabel 8650 1450 0    60   Input ~ 0
 CLK_25MHz
 $Comp
@@ -538,6 +532,87 @@ Text Label 1850 1800 0    60   ~ 0
 FTD-
 Text Label 1850 1900 0    60   ~ 0
 FTD+
-Text Notes 2150 3150 0    60   ~ 0
+Text Notes 2850 3100 0    60   ~ 0
 USB_FPGA connected to\nBANK2 on "ram" sheet
+$Comp
+L R R52
+U 1 1 59C0F7B0
+P 2600 2750
+F 0 "R52" V 2550 2950 50  0000 C CNN
+F 1 "27" V 2600 2750 50  0000 C CNN
+F 2 "Resistors_SMD:R_0603_HandSoldering" V 2530 2750 50  0001 C CNN
+F 3 "" H 2600 2750 50  0000 C CNN
+	1    2600 2750
+	0    1    1    0   
+$EndComp
+$Comp
+L R R53
+U 1 1 59C0F7B6
+P 2600 2850
+F 0 "R53" V 2550 3050 50  0000 C CNN
+F 1 "27" V 2600 2850 50  0000 C CNN
+F 2 "Resistors_SMD:R_0603_HandSoldering" V 2530 2850 50  0001 C CNN
+F 3 "" H 2600 2850 50  0000 C CNN
+	1    2600 2850
+	0    1    1    0   
+$EndComp
+Wire Wire Line
+	2750 2750 3150 2750
+Wire Wire Line
+	2750 2850 3150 2850
+Text Label 1850 2750 0    60   ~ 0
+FPD-
+Text Label 1850 2850 0    60   ~ 0
+FPD+
+Wire Wire Line
+	2900 2600 2900 2850
+Connection ~ 2900 2850
+$Comp
+L D_Zener_Small_ALT D20
+U 1 1 59C133D8
+P 2200 3000
+F 0 "D20" H 2400 2900 50  0000 C CNN
+F 1 "3.6V" H 2200 2910 50  0000 C CNN
+F 2 "Diodes_SMD:D_0805" V 2200 3000 50  0001 C CNN
+F 3 "" V 2200 3000 50  0001 C CNN
+	1    2200 3000
+	0    1    1    0   
+$EndComp
+$Comp
+L D_Zener_Small_ALT D21
+U 1 1 59C134C9
+P 2300 3000
+F 0 "D21" H 2500 3100 50  0000 C CNN
+F 1 "3.6V" H 2300 3100 50  0000 C CNN
+F 2 "Diodes_SMD:D_0805" V 2300 3000 50  0001 C CNN
+F 3 "" V 2300 3000 50  0001 C CNN
+	1    2300 3000
+	0    1    1    0   
+$EndComp
+Wire Wire Line
+	2200 3100 2200 3200
+Wire Wire Line
+	2200 3200 2300 3200
+Wire Wire Line
+	2300 3200 2300 3100
+$Comp
+L GND #PWR090
+U 1 1 59C1372A
+P 2250 3250
+F 0 "#PWR090" H 2250 3000 50  0001 C CNN
+F 1 "GND" H 2250 3100 50  0000 C CNN
+F 2 "" H 2250 3250 50  0001 C CNN
+F 3 "" H 2250 3250 50  0001 C CNN
+	1    2250 3250
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	2250 3250 2250 3200
+Connection ~ 2250 3200
+Wire Wire Line
+	2200 2900 2200 2850
+Connection ~ 2200 2850
+Wire Wire Line
+	2300 2900 2300 2750
+Connection ~ 2300 2750
 $EndSCHEMATC

usb.sch

@@ -56,12 +56,12 @@ $EndDescr
 $Comp
 L D_Schottky_Small D8
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-F 0 "D8" H 2600 1780 50  0000 L CNN
-F 1 "2A" H 2600 1600 50  0000 L CNN
-F 2 "SMD_Packages:SMD-1206_Pol" V 2650 1700 60  0001 C CNN
-F 3 "" V 2650 1700 60  0000 C CNN
-	1    2650 1700
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 $EndComp
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 L D_Schottky_Small D9
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-F 2 "SMD_Packages:SMD-1206_Pol" V 2650 2650 60  0001 C CNN
-F 3 "" V 2650 2650 60  0000 C CNN
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 $EndComp
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-F 2 "" H 2850 2650 60  0000 C CNN
-F 3 "" H 2850 2650 60  0000 C CNN
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 $EndComp
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 L GND #PWR081
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-F 1 "GND" H 1900 1950 50  0000 C CNN
-F 2 "" H 1900 2100 50  0000 C CNN
-F 3 "" H 1900 2100 50  0000 C CNN
-	1    1900 2100
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 $EndComp
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 L GND #PWR082
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-F 1 "GND" H 1900 2900 50  0000 C CNN
-F 2 "" H 1900 3050 50  0000 C CNN
-F 3 "" H 1900 3050 50  0000 C CNN
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 $EndComp
 Text GLabel 3000 1800 2    60   Input ~ 0
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 Text GLabel 3000 1900 2    60   Input ~ 0
 USB_FTDI_D+
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 NoConn ~ 1850 2000
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 $EndComp
 Wire Wire Line
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 Wire Wire Line
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 Wire Wire Line
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 Wire Wire Line
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 Wire Wire Line
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 $Comp
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-F 3 "" H 1850 3650 50  0000 C CNN
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 $EndComp
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 $Comp
 L +3V3 #PWR087
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-F 2 "" H 1850 3500 50  0000 C CNN
-F 3 "" H 1850 3500 50  0000 C CNN
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-D+ pullp for full speed mode USB1.1
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 $Comp
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+F 3 "" H 2600 2750 50  0000 C CNN
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+F 3 "" H 2600 2850 50  0000 C CNN
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+F 3 "" V 2300 3000 50  0001 C CNN
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+$EndComp
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wifi.bak

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 $EndComp
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wifi.sch

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