usb_uart.sch

EESchema Schematic File Version 4
EELAYER 30 0
EELAYER END
$Descr A4 11693 8268
encoding utf-8
Sheet 2 5
Title ""
Date "2019-12-28"
Rev "1.1"
Comp ""
Comment1 ""
Comment2 ""
Comment3 ""
Comment4 ""
$EndDescr
$Comp
L Interface_USB:FT232RL U1
U 1 1 5AFFD6AD
P 5750 3850
AR Path="/5AFFCEDB/5AFFD6AD" Ref="U1"  Part="1" 
AR Path="/5AFFCFA7/5AFFD6AD" Ref="U1"  Part="1" 
AR Path="/5AFFD6AD" Ref="U1"  Part="1" 
F 0 "U1" H 5100 4750 50  0000 L CNN
F 1 "FT232RL" H 6150 4750 50  0000 L CNN
F 2 "Package_SO:SSOP-28_5.3x10.2mm_P0.65mm" H 5750 3850 50  0001 C CNN
F 3 "" H 5750 3850 50  0001 C CNN
	1    5750 3850
	1    0    0    -1  
$EndComp
$Comp
L Connector:USB_B_Micro CON2
U 1 1 5B002225
P 2950 3450
AR Path="/5AFFCEDB/5B002225" Ref="CON2"  Part="1" 
AR Path="/5AFFCFA7/5B002225" Ref="J1"  Part="1" 
F 0 "CON2" H 2750 3900 50  0000 L CNN
F 1 "USB_B_Micro" H 2750 3800 50  0000 L CNN
F 2 "Connector_USB:USB_Micro-B_Molex-105017-0001" H 3100 3400 50  0001 C CNN
F 3 "" H 3100 3400 50  0001 C CNN
	1    2950 3450
	1    0    0    -1  
$EndComp
Text Label 6850 3150 0    39   ~ 0
UART_RX
Text Label 6850 3250 0    39   ~ 0
UART_TX
Text HLabel 7100 3150 2    39   Output ~ 0
UART_RX
Text HLabel 7100 3250 2    39   Input ~ 0
UART_TX
Text HLabel 3650 2000 1    39   Output ~ 0
USB_VCC
$Comp
L Device:L_Small L1
U 1 1 5B016FB0
P 3650 3000
F 0 "L1" H 3680 3040 50  0000 L CNN
F 1 "Ferrite" H 3680 2960 50  0000 L CNN
F 2 "Inductor_SMD:L_0603_1608Metric" H 3650 3000 50  0001 C CNN
F 3 "" H 3650 3000 50  0001 C CNN
	1    3650 3000
	1    0    0    -1  
$EndComp
$Comp
L Device:C_Small C1
U 1 1 5B017096
P 4700 3150
F 0 "C1" H 4710 3220 50  0000 L CNN
F 1 "100n" H 4710 3070 50  0000 L CNN
F 2 "Capacitor_SMD:C_0603_1608Metric" H 4700 3150 50  0001 C CNN
F 3 "" H 4700 3150 50  0001 C CNN
	1    4700 3150
	0    -1   -1   0   
$EndComp
$Comp
L power:GND #PWR01
U 1 1 5B0171A9
P 750 1050
AR Path="/5AFFCEDB/5B0171A9" Ref="#PWR01"  Part="1" 
AR Path="/5AFFCFA7/5B0171A9" Ref="#PWR01"  Part="1" 
F 0 "#PWR01" H 750 800 50  0001 C CNN
F 1 "GND" H 750 900 50  0000 C CNN
F 2 "" H 750 1050 50  0001 C CNN
F 3 "" H 750 1050 50  0001 C CNN
	1    750  1050
	1    0    0    -1  
$EndComp
$Comp
L power:+3V3 #PWR02
U 1 1 5B0171C5
P 750 850
AR Path="/5AFFCEDB/5B0171C5" Ref="#PWR02"  Part="1" 
AR Path="/5AFFCFA7/5B0171C5" Ref="#PWR02"  Part="1" 
F 0 "#PWR02" H 750 700 50  0001 C CNN
F 1 "+3V3" H 750 990 50  0000 C CNN
F 2 "" H 750 850 50  0001 C CNN
F 3 "" H 750 850 50  0001 C CNN
	1    750  850 
	1    0    0    -1  
$EndComp
Text Label 950  900  2    39   ~ 0
+3V3
Text Label 950  1000 2    39   ~ 0
GND
$Comp
L Device:R_Small R1
U 1 1 5B01727B
P 3950 3200
F 0 "R1" H 3980 3220 50  0000 L CNN
F 1 "6k8" H 3980 3160 50  0000 L CNN
F 2 "Resistor_SMD:R_0603_1608Metric" H 3950 3200 50  0001 C CNN
F 3 "" H 3950 3200 50  0001 C CNN
	1    3950 3200
	1    0    0    -1  
$EndComp
$Comp
L Device:R_Small R2
U 1 1 5B0172DB
P 3950 4100
F 0 "R2" H 3980 4120 50  0000 L CNN
F 1 "10k" H 3980 4060 50  0000 L CNN
F 2 "Resistor_SMD:R_0603_1608Metric" H 3950 4100 50  0001 C CNN
F 3 "" H 3950 4100 50  0001 C CNN
	1    3950 4100
	1    0    0    -1  
$EndComp
Text Label 3950 4400 1    39   ~ 0
GND
Text Label 4700 4900 0    39   ~ 0
GND
Text Label 4800 3850 2    39   ~ 0
USB_DETECT
Text HLabel 4150 3700 2    39   Output ~ 0
USB_DETECT
$Comp
L Device:D_Schottky_Small D1
U 1 1 5B0176AC
P 3650 2250
F 0 "D1" H 3700 2200 50  0000 L CNN
F 1 "D_Schottky_Small" H 3300 2350 50  0001 L CNN
F 2 "Diode_SMD:D_SOD-123" V 3650 2250 50  0001 C CNN
F 3 "" V 3650 2250 50  0001 C CNN
	1    3650 2250
	0    1    1    0   
$EndComp
Text Label 3400 3250 0    39   ~ 0
VBUS
Text Label 3300 3450 0    39   ~ 0
USBD+
Text Label 3300 3550 0    39   ~ 0
USBD-
Text Label 3150 3900 2    39   ~ 0
GND
Text Label 3950 2550 0    39   ~ 0
USB_VBUS
Text Label 4900 2800 0    39   ~ 0
FT_3V3
$Comp
L Device:R_Small R3
U 1 1 5B018BEA
P 8550 1650
F 0 "R3" H 8580 1670 50  0000 L CNN
F 1 "10k" H 8580 1610 50  0000 L CNN
F 2 "Resistor_SMD:R_0603_1608Metric" H 8550 1650 50  0001 C CNN
F 3 "" H 8550 1650 50  0001 C CNN
	1    8550 1650
	1    0    0    -1  
$EndComp
$Comp
L Device:R_Small R4
U 1 1 5B018C5A
P 8750 1650
F 0 "R4" H 8780 1670 50  0000 L CNN
F 1 "10k" H 8780 1610 50  0000 L CNN
F 2 "Resistor_SMD:R_0603_1608Metric" H 8750 1650 50  0001 C CNN
F 3 "" H 8750 1650 50  0001 C CNN
	1    8750 1650
	1    0    0    -1  
$EndComp
$Comp
L Jumper:SolderJumper_2_Open JP5
U 1 1 5B0193EF
P 4400 4100
AR Path="/5AFFCEDB/5B0193EF" Ref="JP5"  Part="1" 
AR Path="/5AFFCFA7/5B0193EF" Ref="J2"  Part="1" 
F 0 "JP5" H 4500 4250 50  0000 C CNN
F 1 "SolderJumper_2_Open" H 4500 3951 50  0001 C CNN
F 2 "Jumper:SolderJumper-2_P1.3mm_Open_TrianglePad1.0x1.5mm" V 4474 4100 50  0001 C CNN
F 3 "" H 4400 4100 50  0001 C CNN
	1    4400 4100
	0    1    1    0   
$EndComp
Text Label 4600 4400 2    39   ~ 0
+3V3
$Comp
L Connector_Generic:Conn_01x04 CON3
U 1 1 5B0199D5
P 7950 2000
AR Path="/5AFFCEDB/5B0199D5" Ref="CON3"  Part="1" 
AR Path="/5AFFCFA7/5B0199D5" Ref="J3"  Part="1" 
F 0 "CON3" H 7950 2200 50  0000 C CNN
F 1 "Conn_01x04" H 7950 1700 50  0000 C CNN
F 2 "Brutzelkarte:PinHeader_1x04_P2.54mm_NoSolder" H 7950 2000 50  0001 C CNN
F 3 "" H 7950 2000 50  0001 C CNN
	1    7950 2000
	-1   0    0    -1  
$EndComp
Text Label 8400 1900 2    39   ~ 0
+3V3
Text Label 8400 2000 2    39   ~ 0
GND
Text Label 9100 2100 2    39   ~ 0
UART_RX
Text Label 9100 2200 2    39   ~ 0
UART_TX
$Comp
L power:PWR_FLAG #FLG03
U 1 1 5B01BB7A
P 5650 2750
F 0 "#FLG03" H 5650 2825 50  0001 C CNN
F 1 "PWR_FLAG" H 5650 2900 50  0000 C CNN
F 2 "" H 5650 2750 50  0001 C CNN
F 3 "" H 5650 2750 50  0001 C CNN
	1    5650 2750
	1    0    0    -1  
$EndComp
$Comp
L power:PWR_FLAG #FLG04
U 1 1 5B01C2C1
P 3950 2450
F 0 "#FLG04" H 3950 2525 50  0001 C CNN
F 1 "PWR_FLAG" H 3950 2600 50  0000 C CNN
F 2 "" H 3950 2450 50  0001 C CNN
F 3 "" H 3950 2450 50  0001 C CNN
	1    3950 2450
	1    0    0    -1  
$EndComp
Wire Wire Line
	4950 3450 3250 3450
Wire Wire Line
	4950 3550 3250 3550
Wire Wire Line
	5650 2800 4900 2800
Wire Wire Line
	4900 2800 4900 3150
Wire Wire Line
	4800 3150 4900 3150
Wire Wire Line
	3650 2550 3950 2550
Connection ~ 3650 2550
Connection ~ 4900 3150
Wire Wire Line
	4250 3150 4400 3150
Wire Wire Line
	750  1050 750  1000
Wire Wire Line
	750  1000 950  1000
Wire Wire Line
	750  850  750  900 
Wire Wire Line
	750  900  950  900 
Wire Wire Line
	3950 3300 3950 3700
Wire Wire Line
	3950 3850 4400 3850
Connection ~ 3950 3850
Wire Wire Line
	3950 4200 3950 4250
Wire Wire Line
	4700 4900 4900 4900
Wire Wire Line
	5950 4900 5950 4850
Wire Wire Line
	5850 4850 5850 4900
Connection ~ 5850 4900
Wire Wire Line
	5750 4850 5750 4900
Connection ~ 5750 4900
Wire Wire Line
	5550 4850 5550 4900
Connection ~ 5550 4900
Wire Wire Line
	3950 3100 3950 2550
Connection ~ 3950 2550
Wire Wire Line
	3650 3100 3650 3250
Wire Wire Line
	2950 3850 2950 3900
Wire Wire Line
	2950 3900 3150 3900
Wire Wire Line
	3950 3700 4150 3700
Connection ~ 3950 3700
Connection ~ 4400 3850
Wire Wire Line
	4400 4400 4600 4400
Wire Wire Line
	8150 1900 8400 1900
Wire Wire Line
	8150 2000 8400 2000
Connection ~ 5650 2800
Wire Wire Line
	5650 2750 5650 2800
NoConn ~ 4950 4050
NoConn ~ 4950 4250
NoConn ~ 6550 3350
NoConn ~ 6550 3450
NoConn ~ 6550 3550
NoConn ~ 6550 3650
NoConn ~ 6550 3750
NoConn ~ 6550 3850
NoConn ~ 3250 3650
NoConn ~ 6550 4150
NoConn ~ 6550 4250
NoConn ~ 6550 4350
NoConn ~ 6550 4450
NoConn ~ 6550 4550
Wire Wire Line
	4950 4550 4900 4550
Wire Wire Line
	4900 4550 4900 4900
Connection ~ 4900 4900
Connection ~ 2950 3900
$Comp
L Device:C_Small C30
U 1 1 5B04795D
P 6000 2700
F 0 "C30" H 6010 2770 50  0000 L CNN
F 1 "100n" H 6010 2620 50  0000 L CNN
F 2 "Capacitor_SMD:C_0603_1608Metric" H 6000 2700 50  0001 C CNN
F 3 "" H 6000 2700 50  0001 C CNN
	1    6000 2700
	1    0    0    -1  
$EndComp
$Comp
L Device:C_Small C29
U 1 1 5B0479B6
P 4400 2750
F 0 "C29" H 4410 2820 50  0000 L CNN
F 1 "4u7" H 4410 2670 50  0000 L CNN
F 2 "Capacitor_SMD:C_0603_1608Metric" H 4400 2750 50  0001 C CNN
F 3 "" H 4400 2750 50  0001 C CNN
	1    4400 2750
	1    0    0    -1  
$EndComp
Text Label 4250 3150 0    39   ~ 0
GND
Wire Wire Line
	4400 2650 4400 2550
Connection ~ 4400 2550
Connection ~ 4400 3150
Text Notes 4100 4550 0    39   ~ 0
Close J2 if using external\nUART (via J3)
Text Notes 9050 1700 0    39   ~ 0
Pullups are only needed if external UART is beeing used
$Comp
L Device:C_Small C31
U 1 1 5B04A08C
P 3650 4100
F 0 "C31" H 3660 4170 50  0000 L CNN
F 1 "10n" H 3660 4020 50  0000 L CNN
F 2 "Capacitor_SMD:C_0603_1608Metric" H 3650 4100 50  0001 C CNN
F 3 "" H 3650 4100 50  0001 C CNN
	1    3650 4100
	1    0    0    -1  
$EndComp
Wire Wire Line
	3650 4200 3650 4250
Wire Wire Line
	3650 4250 3950 4250
Connection ~ 3950 4250
Connection ~ 3650 3250
Wire Wire Line
	3650 2550 3650 2900
Wire Wire Line
	4900 3150 4950 3150
Wire Wire Line
	3950 3850 3950 4000
Wire Wire Line
	5850 4900 5950 4900
Wire Wire Line
	5750 4900 5850 4900
Wire Wire Line
	5550 4900 5750 4900
Wire Wire Line
	3950 2550 4400 2550
Wire Wire Line
	3950 3700 3950 3850
Wire Wire Line
	4400 3850 4950 3850
Wire Wire Line
	5650 2800 5650 2850
Wire Wire Line
	4900 4900 5550 4900
Wire Wire Line
	2950 3900 2950 4300
Wire Wire Line
	4400 3150 4600 3150
Wire Wire Line
	3950 4250 3950 4400
Wire Wire Line
	3650 3250 3650 4000
Wire Wire Line
	6550 3250 7100 3250
Wire Wire Line
	6550 3150 7100 3150
Wire Wire Line
	8750 2200 8750 1750
Wire Wire Line
	8150 2200 8750 2200
Wire Wire Line
	8550 1750 8550 2100
Wire Wire Line
	8150 2100 8550 2100
Wire Wire Line
	8550 2100 9100 2100
Connection ~ 8550 2100
Wire Wire Line
	8750 2200 9100 2200
Connection ~ 8750 2200
Wire Wire Line
	8550 1550 8550 1500
Wire Wire Line
	8550 1500 8750 1500
Wire Wire Line
	8750 1550 8750 1500
Connection ~ 8750 1500
Wire Wire Line
	8750 1500 9050 1500
Text Label 9050 1500 2    39   ~ 0
+3V3
$Comp
L Device:D_Schottky_Small D2
U 1 1 5BF16DFC
P 4950 2550
F 0 "D2" H 5000 2500 50  0000 L CNN
F 1 "D_Schottky_Small" H 4600 2650 50  0001 L CNN
F 2 "Diode_SMD:D_SOD-123" V 4950 2550 50  0001 C CNN
F 3 "" V 4950 2550 50  0001 C CNN
	1    4950 2550
	-1   0    0    1   
$EndComp
Wire Wire Line
	4400 3850 4400 3950
Wire Wire Line
	4400 4250 4400 4400
Wire Wire Line
	2850 3850 2850 4000
Text Notes 2800 4550 0    39   ~ 0
USB_DETECT voltage divider:\n5 V / (10K + 6,8K) * 10K  = 2,976 V
Wire Wire Line
	4400 2850 4400 3150
Text Notes 4600 2400 0    39   ~ 0
D2 is to prevent voltage comming from UART_TX\n(going through the protection diodes of the FT232RL\nfrom affecting USB_DETECT
Wire Wire Line
	3650 2000 3650 2150
Wire Wire Line
	3650 2350 3650 2550
Wire Wire Line
	3950 2450 3950 2550
Wire Wire Line
	4400 2550 4850 2550
Wire Wire Line
	5050 2550 5850 2550
Wire Wire Line
	5850 2550 5850 2850
Text Label 5200 2550 0    39   ~ 0
FTDI_VCC
Text Label 6150 2900 2    39   ~ 0
GND
Wire Wire Line
	6000 2800 6000 2900
Wire Wire Line
	6000 2900 6150 2900
Wire Wire Line
	5850 2550 6000 2550
Wire Wire Line
	6000 2550 6000 2600
Connection ~ 5850 2550
Wire Wire Line
	3250 3250 3650 3250
$Comp
L power:PWR_FLAG #FLG0101
U 1 1 5C2A09C5
P 5850 2550
F 0 "#FLG0101" H 5850 2625 50  0001 C CNN
F 1 "PWR_FLAG" H 5850 2724 50  0000 C CNN
F 2 "" H 5850 2550 50  0001 C CNN
F 3 "~" H 5850 2550 50  0001 C CNN
	1    5850 2550
	1    0    0    -1  
$EndComp
$Comp
L Device:C_Small C35
U 1 1 5E0D8999
P 2750 4150
F 0 "C35" H 2760 4220 50  0000 L CNN
F 1 "10n" H 2760 4070 50  0000 L CNN
F 2 "Capacitor_SMD:C_0603_1608Metric" H 2750 4150 50  0001 C CNN
F 3 "" H 2750 4150 50  0001 C CNN
	1    2750 4150
	1    0    0    -1  
$EndComp
$Comp
L Device:R_Small R27
U 1 1 5E0D8F49
P 2500 4150
F 0 "R27" H 2530 4170 50  0000 L CNN
F 1 "100k" H 2530 4110 50  0000 L CNN
F 2 "Resistor_SMD:R_0603_1608Metric" H 2500 4150 50  0001 C CNN
F 3 "" H 2500 4150 50  0001 C CNN
	1    2500 4150
	1    0    0    -1  
$EndComp
Wire Wire Line
	2500 4050 2500 4000
Wire Wire Line
	2500 4000 2750 4000
Wire Wire Line
	2750 4050 2750 4000
Connection ~ 2750 4000
Wire Wire Line
	2750 4000 2850 4000
Wire Wire Line
	2500 4250 2500 4300
Wire Wire Line
	2500 4300 2750 4300
Wire Wire Line
	2750 4250 2750 4300
Connection ~ 2750 4300
Wire Wire Line
	2750 4300 2950 4300
$EndSCHEMATC