EESchema Schematic File Version 4
EELAYER 30 0
EELAYER END
$Descr A4 11693 8268
encoding utf-8
Sheet 4 7
Title ""
Date ""
Rev ""
Comp ""
Comment1 ""
Comment2 ""
Comment3 ""
Comment4 ""
$EndDescr
$Comp
L Audio:WM8731SEDS U2
U 1 1 5FB75D7E
P 5700 3700
F 0 "U2" H 5700 2711 50  0000 C CNN
F 1 "WM8731SEDS" H 5700 2620 50  0000 C CNN
F 2 "Package_SO:SSOP-28_5.3x10.2mm_P0.65mm" H 5700 2400 50  0001 C CNN
F 3 "https://statics.cirrus.com/pubs/proDatasheet/WM8731_v4.9.pdf" H 5700 3700 50  0001 C CNN
	1    5700 3700
	1    0    0    -1  
$EndComp
$Comp
L Device:CP C11
U 1 1 5FB75A99
P 6850 2700
F 0 "C11" V 7105 2700 50  0000 C CNN
F 1 "220uF" V 7014 2700 50  0000 C CNN
F 2 "Capacitor_SMD:CP_Elec_6.3x7.7" H 6888 2550 50  0001 C CNN
F 3 "~" H 6850 2700 50  0001 C CNN
	1    6850 2700
	0    -1   -1   0   
$EndComp
$Comp
L Device:CP C12
U 1 1 5FB761DE
P 6850 3100
F 0 "C12" V 7105 3100 50  0000 C CNN
F 1 "220uF" V 7014 3100 50  0000 C CNN
F 2 "Capacitor_SMD:CP_Elec_6.3x7.7" H 6888 2950 50  0001 C CNN
F 3 "~" H 6850 3100 50  0001 C CNN
	1    6850 3100
	0    -1   -1   0   
$EndComp
$Comp
L Device:R R16
U 1 1 5FB777DE
P 7100 3350
F 0 "R16" H 7170 3396 50  0000 L CNN
F 1 "47k" H 7170 3305 50  0000 L CNN
F 2 "Resistor_SMD:R_0603_1608Metric" V 7030 3350 50  0001 C CNN
F 3 "~" H 7100 3350 50  0001 C CNN
	1    7100 3350
	1    0    0    -1  
$EndComp
$Comp
L Device:R R17
U 1 1 5FB78005
P 7400 3350
F 0 "R17" H 7470 3396 50  0000 L CNN
F 1 "47k" H 7470 3305 50  0000 L CNN
F 2 "Resistor_SMD:R_0603_1608Metric" V 7330 3350 50  0001 C CNN
F 3 "~" H 7400 3350 50  0001 C CNN
	1    7400 3350
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR0119
U 1 1 5FB78F6F
P 5500 5000
F 0 "#PWR0119" H 5500 4750 50  0001 C CNN
F 1 "GND" H 5505 4827 50  0000 C CNN
F 2 "" H 5500 5000 50  0001 C CNN
F 3 "" H 5500 5000 50  0001 C CNN
	1    5500 5000
	1    0    0    -1  
$EndComp
Wire Wire Line
	5900 4600 5900 4900
Wire Wire Line
	5900 4900 5800 4900
Wire Wire Line
	5500 4900 5500 4600
Wire Wire Line
	5800 4600 5800 4900
Connection ~ 5800 4900
Wire Wire Line
	5800 4900 5500 4900
Wire Wire Line
	5500 4900 5500 5000
Connection ~ 5500 4900
$Comp
L Connector:AudioJack3_SwitchTR J7
U 1 1 5FB7EC62
P 8750 4600
F 0 "J7" H 8470 4433 50  0000 R CNN
F 1 "MIC" H 8470 4524 50  0000 R CNN
F 2 "HackAmp-Footprints:Jack_3.5mm_Switchcraft_35RASMT4BHNTRX_Horizontal" H 8750 4600 50  0001 C CNN
F 3 "~" H 8750 4600 50  0001 C CNN
F 4 "Switchcraft 35RASMT4BHNTRX" H 8750 4600 50  0001 C CNN "Part Name"
	1    8750 4600
	-1   0    0    1   
$EndComp
$Comp
L Connector:AudioJack3_SwitchTR J6
U 1 1 5FB7F9E4
P 8150 3000
F 0 "J6" H 7870 2833 50  0000 R CNN
F 1 "HP" H 7870 2924 50  0000 R CNN
F 2 "HackAmp-Footprints:Jack_3.5mm_Switchcraft_35RASMT4BHNTRX_Horizontal" H 8150 3000 50  0001 C CNN
F 3 "~" H 8150 3000 50  0001 C CNN
F 4 "Switchcraft 35RASMT4BHNTRX" H 8150 3000 50  0001 C CNN "Part Name"
	1    8150 3000
	-1   0    0    1   
$EndComp
$Comp
L Device:C C13
U 1 1 5FB84D82
P 6500 4650
F 0 "C13" H 6615 4696 50  0000 L CNN
F 1 "10uF" H 6615 4605 50  0000 L CNN
F 2 "Capacitor_SMD:C_0805_2012Metric" H 6538 4500 50  0001 C CNN
F 3 "~" H 6500 4650 50  0001 C CNN
F 4 "Taiyo Yuden LMK212F106ZG-T" H 6500 4650 50  0001 C CNN "Part Name"
	1    6500 4650
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR0120
U 1 1 5FB85E99
P 6500 5000
F 0 "#PWR0120" H 6500 4750 50  0001 C CNN
F 1 "GND" H 6505 4827 50  0000 C CNN
F 2 "" H 6500 5000 50  0001 C CNN
F 3 "" H 6500 5000 50  0001 C CNN
	1    6500 5000
	1    0    0    -1  
$EndComp
Wire Wire Line
	6400 4400 6500 4400
Wire Wire Line
	6500 4500 6500 4400
NoConn ~ 5000 4100
NoConn ~ 5000 4300
Wire Wire Line
	6500 4800 6500 5000
$Comp
L Device:C C14
U 1 1 5FB8C4B3
P 6750 1200
F 0 "C14" H 6865 1246 50  0000 L CNN
F 1 "10uF" H 6865 1155 50  0000 L CNN
F 2 "Capacitor_SMD:C_0805_2012Metric" H 6788 1050 50  0001 C CNN
F 3 "~" H 6750 1200 50  0001 C CNN
F 4 "Taiyo Yuden LMK212F106ZG-T" H 6750 1200 50  0001 C CNN "Part Name"
	1    6750 1200
	1    0    0    -1  
$EndComp
$Comp
L Device:C C15
U 1 1 5FB8C712
P 7150 1200
F 0 "C15" H 7265 1246 50  0000 L CNN
F 1 "10uF" H 7265 1155 50  0000 L CNN
F 2 "Capacitor_SMD:C_0805_2012Metric" H 7188 1050 50  0001 C CNN
F 3 "~" H 7150 1200 50  0001 C CNN
F 4 "Taiyo Yuden LMK212F106ZG-T" H 7150 1200 50  0001 C CNN "Part Name"
	1    7150 1200
	1    0    0    -1  
$EndComp
$Comp
L Device:C C16
U 1 1 5FB8CA6D
P 7550 1200
F 0 "C16" H 7665 1246 50  0000 L CNN
F 1 "10uF" H 7665 1155 50  0000 L CNN
F 2 "Capacitor_SMD:C_0805_2012Metric" H 7588 1050 50  0001 C CNN
F 3 "~" H 7550 1200 50  0001 C CNN
F 4 "Taiyo Yuden LMK212F106ZG-T" H 7550 1200 50  0001 C CNN "Part Name"
	1    7550 1200
	1    0    0    -1  
$EndComp
$Comp
L Device:C C17
U 1 1 5FB8CEAA
P 7950 1200
F 0 "C17" H 8065 1246 50  0000 L CNN
F 1 "10uF" H 8065 1155 50  0000 L CNN
F 2 "Capacitor_SMD:C_0805_2012Metric" H 7988 1050 50  0001 C CNN
F 3 "~" H 7950 1200 50  0001 C CNN
F 4 "Taiyo Yuden LMK212F106ZG-T" H 7950 1200 50  0001 C CNN "Part Name"
	1    7950 1200
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR0121
U 1 1 5FB8F287
P 6750 1550
F 0 "#PWR0121" H 6750 1300 50  0001 C CNN
F 1 "GND" H 6755 1377 50  0000 C CNN
F 2 "" H 6750 1550 50  0001 C CNN
F 3 "" H 6750 1550 50  0001 C CNN
	1    6750 1550
	1    0    0    -1  
$EndComp
Wire Wire Line
	6750 1350 6750 1450
Wire Wire Line
	6750 1450 7150 1450
Wire Wire Line
	7950 1450 7950 1350
Connection ~ 6750 1450
Wire Wire Line
	6750 1450 6750 1550
Wire Wire Line
	7150 1350 7150 1450
Connection ~ 7150 1450
Wire Wire Line
	7150 1450 7550 1450
Wire Wire Line
	7550 1450 7550 1350
Connection ~ 7550 1450
Wire Wire Line
	7550 1450 7950 1450
Text HLabel 6650 950  0    50   Input ~ 0
3.3V
Text HLabel 5400 2700 0    50   Input ~ 0
3.3V
Wire Wire Line
	5400 2700 5500 2700
Wire Wire Line
	5900 2700 5900 2800
Wire Wire Line
	5800 2800 5800 2700
Connection ~ 5800 2700
Wire Wire Line
	5800 2700 5900 2700
Wire Wire Line
	5600 2800 5600 2700
Connection ~ 5600 2700
Wire Wire Line
	5600 2700 5800 2700
Wire Wire Line
	5500 2800 5500 2700
Connection ~ 5500 2700
Wire Wire Line
	5500 2700 5600 2700
Wire Wire Line
	6650 950  6750 950 
Wire Wire Line
	7950 950  7950 1050
Wire Wire Line
	7550 1050 7550 950 
Connection ~ 7550 950 
Wire Wire Line
	7550 950  7950 950 
Wire Wire Line
	7150 1050 7150 950 
Connection ~ 7150 950 
Wire Wire Line
	7150 950  7550 950 
Wire Wire Line
	6750 1050 6750 950 
Connection ~ 6750 950 
Wire Wire Line
	6750 950  7150 950 
Text Notes 9000 1850 0    50   ~ 0
TODO: Headphone/microphone detection.
Text HLabel 10100 2350 2    50   Input ~ 0
HP_DETECT
Text HLabel 10100 2500 2    50   Input ~ 0
MIC_DETECT
Text HLabel 4050 4200 0    50   Input ~ 0
MCLK
Text HLabel 3850 3000 0    50   Input ~ 0
CK
Text HLabel 3850 2900 0    50   Input ~ 0
WS
Text HLabel 3850 3100 0    50   Input ~ 0
SDI
Text HLabel 3850 3200 0    50   Input ~ 0
SDO
Text HLabel 3850 3500 0    50   Input ~ 0
SCL
Text HLabel 3850 3600 0    50   Input ~ 0
SDA
NoConn ~ 6400 3400
NoConn ~ 6400 3500
NoConn ~ 6400 3700
NoConn ~ 6400 3800
$Comp
L power:GND #PWR0122
U 1 1 5FBA7853
P 7100 3600
F 0 "#PWR0122" H 7100 3350 50  0001 C CNN
F 1 "GND" H 7105 3427 50  0000 C CNN
F 2 "" H 7100 3600 50  0001 C CNN
F 3 "" H 7100 3600 50  0001 C CNN
	1    7100 3600
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR0123
U 1 1 5FBA7BF6
P 7400 3600
F 0 "#PWR0123" H 7400 3350 50  0001 C CNN
F 1 "GND" H 7405 3427 50  0000 C CNN
F 2 "" H 7400 3600 50  0001 C CNN
F 3 "" H 7400 3600 50  0001 C CNN
	1    7400 3600
	1    0    0    -1  
$EndComp
Wire Wire Line
	6400 3200 6600 3200
Wire Wire Line
	6600 3200 6600 3100
Wire Wire Line
	6600 3100 6700 3100
Wire Wire Line
	6400 3100 6500 3100
Wire Wire Line
	6500 3100 6500 2700
Wire Wire Line
	6500 2700 6700 2700
Wire Wire Line
	7000 3100 7100 3100
Wire Wire Line
	7100 3100 7100 3200
Wire Wire Line
	7000 2700 7400 2700
Wire Wire Line
	7400 2700 7400 2800
Wire Wire Line
	7100 3500 7100 3600
Wire Wire Line
	7400 3600 7400 3500
$Comp
L power:GND #PWR0124
U 1 1 5FBB8FFB
P 7850 3200
F 0 "#PWR0124" H 7850 2950 50  0001 C CNN
F 1 "GND" H 7855 3027 50  0000 C CNN
F 2 "" H 7850 3200 50  0001 C CNN
F 3 "" H 7850 3200 50  0001 C CNN
	1    7850 3200
	1    0    0    -1  
$EndComp
Wire Wire Line
	7950 3100 7850 3100
Wire Wire Line
	7850 3100 7850 3200
Wire Wire Line
	7950 3000 7750 3000
Wire Wire Line
	7750 3000 7750 3100
Wire Wire Line
	7750 3100 7100 3100
Connection ~ 7100 3100
Wire Wire Line
	7950 2800 7400 2800
Connection ~ 7400 2800
Wire Wire Line
	7400 2800 7400 3200
NoConn ~ 7950 2900
$Comp
L Device:R R18
U 1 1 5FBBCE37
P 6650 4000
F 0 "R18" V 6443 4000 50  0000 C CNN
F 1 "680" V 6534 4000 50  0000 C CNN
F 2 "Resistor_SMD:R_0603_1608Metric" V 6580 4000 50  0001 C CNN
F 3 "~" H 6650 4000 50  0001 C CNN
	1    6650 4000
	0    1    1    0   
$EndComp
$Comp
L Device:R R19
U 1 1 5FBBD8AD
P 6850 4400
F 0 "R19" V 6643 4400 50  0000 C CNN
F 1 "40k" V 6734 4400 50  0000 C CNN
F 2 "Resistor_SMD:R_0603_1608Metric" V 6780 4400 50  0001 C CNN
F 3 "~" H 6850 4400 50  0001 C CNN
	1    6850 4400
	0    1    1    0   
$EndComp
$Comp
L Device:CP C18
U 1 1 5FBBE29C
P 7250 4400
F 0 "C18" V 7505 4400 50  0000 C CNN
F 1 "1uF" V 7414 4400 50  0000 C CNN
F 2 "Capacitor_SMD:CP_Elec_4x5.4" H 7288 4250 50  0001 C CNN
F 3 "~" H 7250 4400 50  0001 C CNN
	1    7250 4400
	0    -1   -1   0   
$EndComp
$Comp
L Device:C C19
U 1 1 5FBC066B
P 7500 4650
F 0 "C19" H 7615 4696 50  0000 L CNN
F 1 "220pF" H 7615 4605 50  0000 L CNN
F 2 "Capacitor_SMD:C_0603_1608Metric" H 7538 4500 50  0001 C CNN
F 3 "~" H 7500 4650 50  0001 C CNN
F 4 "Vishay VJ0603A221JNAAO" H 7500 4650 50  0001 C CNN "Part Name"
	1    7500 4650
	1    0    0    -1  
$EndComp
$Comp
L Device:R R20
U 1 1 5FBC0E7B
P 7950 4650
F 0 "R20" H 8020 4696 50  0000 L CNN
F 1 "47k" H 8020 4605 50  0000 L CNN
F 2 "Resistor_SMD:R_0603_1608Metric" V 7880 4650 50  0001 C CNN
F 3 "~" H 7950 4650 50  0001 C CNN
	1    7950 4650
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR0125
U 1 1 5FBC16EB
P 7500 4900
F 0 "#PWR0125" H 7500 4650 50  0001 C CNN
F 1 "GND" H 7505 4727 50  0000 C CNN
F 2 "" H 7500 4900 50  0001 C CNN
F 3 "" H 7500 4900 50  0001 C CNN
	1    7500 4900
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR0126
U 1 1 5FBC1B94
P 7950 4900
F 0 "#PWR0126" H 7950 4650 50  0001 C CNN
F 1 "GND" H 7955 4727 50  0000 C CNN
F 2 "" H 7950 4900 50  0001 C CNN
F 3 "" H 7950 4900 50  0001 C CNN
	1    7950 4900
	1    0    0    -1  
$EndComp
Wire Wire Line
	6400 4000 6500 4000
Wire Wire Line
	6400 4200 6600 4200
Wire Wire Line
	6600 4200 6600 4400
Wire Wire Line
	6600 4400 6700 4400
Wire Wire Line
	7000 4400 7100 4400
Wire Wire Line
	7400 4400 7500 4400
Wire Wire Line
	7500 4400 7500 4500
Wire Wire Line
	7500 4800 7500 4900
Wire Wire Line
	7950 4900 7950 4800
Wire Wire Line
	7950 4500 7950 4400
Wire Wire Line
	7950 4000 6800 4000
Wire Wire Line
	8550 4400 7950 4400
Connection ~ 7500 4400
Connection ~ 7950 4400
Wire Wire Line
	7950 4400 7950 4000
Wire Wire Line
	7950 4400 7500 4400
$Comp
L power:GND #PWR0127
U 1 1 5FBD60E9
P 8450 4800
F 0 "#PWR0127" H 8450 4550 50  0001 C CNN
F 1 "GND" H 8455 4627 50  0000 C CNN
F 2 "" H 8450 4800 50  0001 C CNN
F 3 "" H 8450 4800 50  0001 C CNN
	1    8450 4800
	1    0    0    -1  
$EndComp
Wire Wire Line
	8550 4700 8450 4700
Wire Wire Line
	8450 4700 8450 4800
NoConn ~ 8550 4600
NoConn ~ 8550 4500
Text Notes 8500 5350 0    50   ~ 0
TODO: Check microphone connection again and make configurable - other schematics connect only the ring!
$EndSCHEMATC