EESchema Schematic File Version 4 EELAYER 30 0 EELAYER END $Descr USLedger 17000 11000 encoding utf-8 Sheet 1 1 Title "Unified Retro Keyboard ASCII Interface (2560)" Date "2021-08-08" Rev "3.6" Comp "OSIWeb.org" Comment1 "Main Keyboard Interface" Comment2 "" Comment3 "" Comment4 "" $EndDescr $Comp L Connector_Generic:Conn_01x16 J2 U 1 1 5BCB9E1D P 1200 7900 F 0 "J2" H 1210 8710 50 0000 C CNN F 1 "Apple 1" H 1415 7875 50 0000 C CNN F 2 "Package_DIP:DIP-16_W7.62mm_Socket" H 1200 7900 50 0001 C CNN F 3 "~" H 1200 7900 50 0001 C CNN 1 1200 7900 -1 0 0 -1 $EndComp Text Label 13750 3200 0 50 ~ 0 Row4 Text Label 13750 3100 0 50 ~ 0 Row5 Text Label 13750 3000 0 50 ~ 0 Row6 Text Label 13750 2900 0 50 ~ 0 Row7 Text Label 13750 3300 0 50 ~ 0 Row3 Text Label 13750 3400 0 50 ~ 0 Row2 Text Label 13750 3500 0 50 ~ 0 Row1 Text Label 13750 3600 0 50 ~ 0 Row0 Text Label 13750 2100 0 50 ~ 0 Col7 Text Label 13750 2200 0 50 ~ 0 Col6 Text Label 13750 2300 0 50 ~ 0 Col5 Text Label 13750 2400 0 50 ~ 0 Col4 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P 15150 6600 F 0 "D20" H 15035 6550 50 0000 C CNN F 1 "1N4148" H 15040 6470 50 0000 C CNN F 2 "Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal" H 15150 6425 50 0001 C CNN F 3 "https://assets.nexperia.com/documents/data-sheet/1N4148_1N4448.pdf" H 15150 6600 50 0001 C CNN 1 15150 6600 1 0 0 1 $EndComp $Comp L Diode:1N4148 D21 U 1 1 5DF31D18 P 15150 6800 F 0 "D21" H 15025 6750 50 0000 C CNN F 1 "1N4148" H 14948 6840 50 0001 C CNN F 2 "Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal" H 15150 6625 50 0001 C CNN F 3 "https://assets.nexperia.com/documents/data-sheet/1N4148_1N4448.pdf" H 15150 6800 50 0001 C CNN 1 15150 6800 1 0 0 1 $EndComp $Comp L Diode:1N4148 D24 U 1 1 5DF29274 P 15450 6700 F 0 "D24" H 15325 6660 50 0000 C CNN F 1 "1N4148" H 15248 6740 50 0001 C CNN F 2 "Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal" H 15450 6525 50 0001 C CNN F 3 "https://assets.nexperia.com/documents/data-sheet/1N4148_1N4448.pdf" H 15450 6700 50 0001 C CNN 1 15450 6700 1 0 0 1 $EndComp $Comp L Switch:SW_DIP_x08 SW1 U 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14815 1915 1 0 0 -1 $EndComp Wire Wire Line 14800 3100 14815 3100 Wire Wire Line 14815 3100 14815 2700 Connection ~ 14815 2300 $Comp L Device:C C4 U 1 1 5BFE9D13 P 10500 9550 F 0 "C4" H 10505 9630 50 0000 L CNN F 1 "0.1 uF" H 10515 9465 50 0000 L CNN F 2 "Capacitor_THT:C_Disc_D3.0mm_W1.6mm_P2.50mm" H 10538 9400 50 0001 C CNN F 3 "~" H 10500 9550 50 0001 C CNN 1 10500 9550 1 0 0 -1 $EndComp $Comp L Device:C C3 U 1 1 5BFE9C80 P 10100 9550 F 0 "C3" H 10105 9630 50 0000 L CNN F 1 "0.1 uF" H 10110 9470 50 0000 L CNN F 2 "Capacitor_THT:C_Disc_D3.0mm_W1.6mm_P2.50mm" H 10138 9400 50 0001 C CNN F 3 "~" H 10100 9550 50 0001 C CNN 1 10100 9550 1 0 0 -1 $EndComp $Comp L Connector_Generic:Conn_01x04 J3 U 1 1 5E4CDDD4 P 1200 9400 F 0 "J3" H 1118 8975 50 0000 C CNN F 1 "UART" H 1118 9066 50 0000 C CNN F 2 "Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Horizontal" H 1200 9400 50 0001 C CNN F 3 "~" H 1200 9400 50 0001 C CNN 1 1200 9400 -1 0 0 -1 $EndComp Wire Wire Line 1500 9250 1500 9300 Text Label 1530 9400 0 50 ~ 0 Tx Text Label 1535 9500 0 50 ~ 0 Rx Wire Wire Line 14815 2700 14800 2700 Connection ~ 14815 2700 Wire Wire Line 14815 2700 14815 2300 Entry Wire Line 15800 2400 15900 2500 Text Label 15450 2400 0 50 ~ 0 LED1 Text Label 15475 2800 0 50 ~ 0 LED2 Text Label 15475 3200 0 50 ~ 0 LED3 Entry Wire Line 13500 7200 13600 7300 Entry Wire Line 15800 3000 15900 3100 Wire Wire Line 1400 8600 2100 8600 Text Label 1500 8300 0 50 ~ 0 OUT1 Text Notes 1385 8595 0 50 ~ 0 (D7 to +5V) NoConn ~ 1400 8400 NoConn ~ 1400 8100 NoConn ~ 1400 8200 NoConn ~ 1400 5300 NoConn ~ 1400 5800 NoConn ~ 1400 6300 NoConn ~ 1400 6400 NoConn ~ 1400 6500 Text Notes 3395 9280 0 50 ~ 0 SOL-20:\n/RESET (PIN 13) = OUT3\nBREAK (PIN 4) = OUT2 \nLOCAL (PIN 14) = OUT1\n\n\nApple 1:\nD7 on socket is tied high\n/RESET = OUT3\nCLRSCR = OUT1\n\nApple 2:\n/RESET = OUT3\n\n $Comp L Connector_Generic:Conn_01x20 J5 U 1 1 5E5FA80F P 1300 3000 F 0 "J5" H 1218 4117 50 0000 C CNN F 1 "SOL-20" H 1535 2980 50 0000 C CNN F 2 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"1N4148" H 10090 3610 50 0000 C CNN F 2 "unikbd:D_DO-35_SOD27_P7.62mm_Horizontal_bypassed" H 10150 3325 50 0001 C CNN F 3 "https://assets.nexperia.com/documents/data-sheet/1N4148_1N4448.pdf" H 10150 3500 50 0001 C CNN 1 10150 3500 1 0 0 -1 $EndComp $Comp L Diode:1N4148 D1 U 1 1 5E36B862 P 9950 3600 F 0 "D1" H 11000 3600 50 0000 C CNN F 1 "1N4148" H 9748 3640 50 0001 C CNN F 2 "unikbd:D_DO-35_SOD27_P7.62mm_Horizontal_bypassed" H 9950 3425 50 0001 C CNN F 3 "https://assets.nexperia.com/documents/data-sheet/1N4148_1N4448.pdf" H 9950 3600 50 0001 C CNN 1 9950 3600 1 0 0 -1 $EndComp $Comp L Diode:1N4148 D10 U 1 1 5E3942E4 P 10150 3700 F 0 "D10" H 11000 3700 50 0000 C CNN F 1 "1N4148" H 9948 3740 50 0001 C CNN F 2 "unikbd:D_DO-35_SOD27_P7.62mm_Horizontal_bypassed" H 10150 3525 50 0001 C CNN F 3 "https://assets.nexperia.com/documents/data-sheet/1N4148_1N4448.pdf" H 10150 3700 50 0001 C CNN 1 10150 3700 1 0 0 -1 $EndComp $Comp L Diode:1N4148 D2 U 1 1 5E357678 P 9950 3800 F 0 "D2" H 11000 3800 50 0000 C CNN F 1 "1N4148" H 9748 3840 50 0001 C CNN F 2 "unikbd:D_DO-35_SOD27_P7.62mm_Horizontal_bypassed" H 9950 3625 50 0001 C CNN F 3 "https://assets.nexperia.com/documents/data-sheet/1N4148_1N4448.pdf" H 9950 3800 50 0001 C CNN 1 9950 3800 1 0 0 -1 $EndComp $Comp L Diode:1N4148 D11 U 1 1 5E37FC86 P 10150 3900 F 0 "D11" H 11000 3900 50 0000 C CNN F 1 "1N4148" H 9948 3940 50 0001 C CNN F 2 "unikbd:D_DO-35_SOD27_P7.62mm_Horizontal_bypassed" H 10150 3725 50 0001 C CNN F 3 "https://assets.nexperia.com/documents/data-sheet/1N4148_1N4448.pdf" H 10150 3900 50 0001 C CNN 1 10150 3900 1 0 0 -1 $EndComp $Comp L Diode:1N4148 D3 U 1 1 5E34160D P 9950 4000 F 0 "D3" H 11000 4000 50 0000 C CNN F 1 "1N4148" H 9748 4040 50 0001 C CNN F 2 "unikbd:D_DO-35_SOD27_P7.62mm_Horizontal_bypassed" H 9950 3825 50 0001 C CNN F 3 "https://assets.nexperia.com/documents/data-sheet/1N4148_1N4448.pdf" H 9950 4000 50 0001 C CNN 1 9950 4000 1 0 0 -1 $EndComp $Comp L Diode:1N4148 D12 U 1 1 5E32CB02 P 10150 4100 F 0 "D12" H 11000 4100 50 0000 C CNN F 1 "1N4148" H 9948 4140 50 0001 C CNN F 2 "unikbd:D_DO-35_SOD27_P7.62mm_Horizontal_bypassed" H 10150 3925 50 0001 C CNN F 3 "https://assets.nexperia.com/documents/data-sheet/1N4148_1N4448.pdf" H 10150 4100 50 0001 C CNN 1 10150 4100 1 0 0 -1 $EndComp $Comp L Diode:1N4148 D4 U 1 1 5E316F0B P 9950 4200 F 0 "D4" H 11000 4200 50 0000 C CNN F 1 "1N4148" H 9748 4240 50 0001 C CNN F 2 "unikbd:D_DO-35_SOD27_P7.62mm_Horizontal_bypassed" H 9950 4025 50 0001 C CNN F 3 "https://assets.nexperia.com/documents/data-sheet/1N4148_1N4448.pdf" H 9950 4200 50 0001 C CNN 1 9950 4200 1 0 0 -1 $EndComp Text Label 10480 3900 2 50 ~ 0 Row4 Text Label 10480 4000 2 50 ~ 0 Row5 Text Label 10480 4100 2 50 ~ 0 Row6 Text Label 10480 4200 2 50 ~ 0 Row7 Text Label 10480 3800 2 50 ~ 0 Row3 Text Label 10480 3700 2 50 ~ 0 Row2 Text Label 10480 3500 2 50 ~ 0 Row0 Entry Wire Line 10700 4600 10600 4500 Entry Wire Line 10700 5300 10600 5200 Entry Wire Line 10700 5200 10600 5100 Entry Wire 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Line 10600 4100 10300 4100 Wire Wire Line 10600 4200 10100 4200 Entry Wire Line 10700 2600 10600 2500 Entry Wire Line 10700 3000 10600 2900 Entry Wire Line 10700 3300 10600 3200 Entry Wire Line 10700 2800 10600 2700 Entry Wire Line 10700 3100 10600 3000 Entry Wire Line 10700 2700 10600 2600 Entry Wire Line 10700 3200 10600 3100 Entry Wire Line 10700 2900 10600 2800 $Comp L Diode:1N4148 D13 U 1 1 5F1EFED9 P 10150 4500 F 0 "D13" H 11000 4500 50 0000 C CNN F 1 "1N4148" H 10090 4610 50 0000 C CNN F 2 "unikbd:D_DO-35_SOD27_P7.62mm_Horizontal_bypassed" H 10150 4325 50 0001 C CNN F 3 "https://assets.nexperia.com/documents/data-sheet/1N4148_1N4448.pdf" H 10150 4500 50 0001 C CNN 1 10150 4500 1 0 0 -1 $EndComp $Comp L Diode:1N4148 D5 U 1 1 5F1EFEDF P 9950 4600 F 0 "D5" H 11000 4600 50 0000 C CNN F 1 "1N4148" H 9748 4640 50 0001 C CNN F 2 "unikbd:D_DO-35_SOD27_P7.62mm_Horizontal_bypassed" H 9950 4425 50 0001 C CNN F 3 "https://assets.nexperia.com/documents/data-sheet/1N4148_1N4448.pdf" H 9950 4600 50 0001 C CNN 1 9950 4600 1 0 0 -1 $EndComp $Comp L Diode:1N4148 D14 U 1 1 5F1EFEE5 P 10150 4700 F 0 "D14" H 11000 4700 50 0000 C CNN F 1 "1N4148" H 9948 4740 50 0001 C CNN F 2 "unikbd:D_DO-35_SOD27_P7.62mm_Horizontal_bypassed" H 10150 4525 50 0001 C CNN F 3 "https://assets.nexperia.com/documents/data-sheet/1N4148_1N4448.pdf" H 10150 4700 50 0001 C CNN 1 10150 4700 1 0 0 -1 $EndComp $Comp L Diode:1N4148 D6 U 1 1 5F1EFEEB P 9950 4800 F 0 "D6" H 11000 4800 50 0000 C CNN F 1 "1N4148" H 9748 4840 50 0001 C CNN F 2 "unikbd:D_DO-35_SOD27_P7.62mm_Horizontal_bypassed" H 9950 4625 50 0001 C CNN F 3 "https://assets.nexperia.com/documents/data-sheet/1N4148_1N4448.pdf" H 9950 4800 50 0001 C CNN 1 9950 4800 1 0 0 -1 $EndComp $Comp L Diode:1N4148 D15 U 1 1 5F1EFEF1 P 10150 4900 F 0 "D15" H 11000 4900 50 0000 C CNN F 1 "1N4148" H 9948 4940 50 0001 C CNN F 2 "unikbd:D_DO-35_SOD27_P7.62mm_Horizontal_bypassed" H 10150 4725 50 0001 C CNN F 3 "https://assets.nexperia.com/documents/data-sheet/1N4148_1N4448.pdf" H 10150 4900 50 0001 C CNN 1 10150 4900 1 0 0 -1 $EndComp $Comp L Diode:1N4148 D7 U 1 1 5F1EFEF7 P 9950 5000 F 0 "D7" H 11000 5000 50 0000 C CNN F 1 "1N4148" H 9748 5040 50 0001 C CNN F 2 "unikbd:D_DO-35_SOD27_P7.62mm_Horizontal_bypassed" H 9950 4825 50 0001 C CNN F 3 "https://assets.nexperia.com/documents/data-sheet/1N4148_1N4448.pdf" H 9950 5000 50 0001 C CNN 1 9950 5000 1 0 0 -1 $EndComp $Comp L Diode:1N4148 D16 U 1 1 5F1EFEFD P 10150 5100 F 0 "D16" H 11000 5100 50 0000 C CNN F 1 "1N4148" H 9948 5140 50 0001 C CNN F 2 "unikbd:D_DO-35_SOD27_P7.62mm_Horizontal_bypassed" H 10150 4925 50 0001 C CNN F 3 "https://assets.nexperia.com/documents/data-sheet/1N4148_1N4448.pdf" H 10150 5100 50 0001 C CNN 1 10150 5100 1 0 0 -1 $EndComp $Comp L Diode:1N4148 D8 U 1 1 5F1EFF03 P 9950 5200 F 0 "D8" H 11000 5200 50 0000 C CNN F 1 "1N4148" H 9748 5240 50 0001 C CNN F 2 "unikbd:D_DO-35_SOD27_P7.62mm_Horizontal_bypassed" H 9950 5025 50 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Connection ~ 14100 7000 Wire Wire Line 14100 7000 14100 7100 Wire Wire Line 14300 6900 14100 6900 Connection ~ 14100 6900 Wire Wire Line 14100 6900 14100 7000 Wire Wire Line 14300 6800 14100 6800 Connection ~ 14100 6800 Wire Wire Line 14100 6800 14100 6900 Wire Wire Line 14300 6700 14100 6700 Connection ~ 14100 6700 Wire Wire Line 14100 6700 14100 6800 NoConn ~ 14800 3300 NoConn ~ 14800 3400 NoConn ~ 14800 3500 NoConn ~ 14800 3600 NoConn ~ 8900 5500 NoConn ~ 8900 5600 NoConn ~ 8900 5700 NoConn ~ 8900 5800 NoConn ~ 8900 5900 NoConn ~ 8900 6000 NoConn ~ 8900 6100 NoConn ~ 8900 6200 NoConn ~ 8900 6500 NoConn ~ 8900 6600 NoConn ~ 8900 6700 NoConn ~ 8900 6800 NoConn ~ 8900 6900 NoConn ~ 8900 7000 NoConn ~ 8900 7200 NoConn ~ 8900 7300 NoConn ~ 8900 7400 NoConn ~ 8900 7500 NoConn ~ 8900 7600 NoConn ~ 7300 6600 NoConn ~ 7300 6500 NoConn ~ 7300 6400 NoConn ~ 7300 6300 NoConn ~ 7300 6200 NoConn ~ 7300 6100 NoConn ~ 7300 4900 NoConn ~ 7300 4700 NoConn ~ 7300 4600 NoConn ~ 7300 4500 NoConn ~ 7300 4400 NoConn ~ 7300 4300 NoConn ~ 7300 4200 NoConn ~ 7300 4100 NoConn ~ 7300 4000 Wire Bus Line 15900 8200 13500 8200 Connection ~ 13500 8200 $Comp L unikbd:ATmega2560-16AU U1 U 1 1 5EC4527C P 8100 4900 F 0 "U1" H 7500 7800 50 0000 C CNN F 1 "ATmega2560-16AU" H 8100 5100 50 0000 C CNN F 2 "Package_QFP:TQFP-100_14x14mm_P0.5mm" H 8100 4600 50 0001 C CIN F 3 "http://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-2549-8-bit-AVR-Microcontroller-ATmega640-1280-1281-2560-2561_datasheet.pdf" H 8100 4900 50 0001 C CNN 1 8100 4900 1 0 0 -1 $EndComp NoConn ~ 7300 2900 NoConn ~ 7300 3100 NoConn ~ 2000 8900 $Comp L power:GND #PWR03 U 1 1 5F4E6EA5 P 1900 6500 F 0 "#PWR03" H 1900 6250 50 0001 C CNN F 1 "GND" H 1905 6327 50 0000 C CNN F 2 "" H 1900 6500 50 0001 C CNN F 3 "" H 1900 6500 50 0001 C CNN 1 1900 6500 1 0 0 -1 $EndComp Wire Wire Line 1900 5700 1900 6500 $Comp L power:GND #PWR015 U 1 1 5F52426A P 6650 2350 F 0 "#PWR015" H 6650 2100 50 0001 C CNN F 1 "GND" H 6655 2177 50 0000 C CNN F 2 "" H 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11500 9900 11300 9900 $Comp L power:VCC #PWR012 U 1 1 5F86A206 P 4850 1950 F 0 "#PWR012" H 4850 1800 50 0001 C CNN F 1 "VCC" H 4867 2123 50 0000 C CNN F 2 "" H 4850 1950 50 0001 C CNN F 3 "" H 4850 1950 50 0001 C CNN 1 4850 1950 1 0 0 -1 $EndComp Text Label 13800 7300 0 50 ~ 0 Row8 $Comp L Connector_Generic:Conn_02x08_Counter_Clockwise J7 U 1 1 5E9AC1D6 P 12000 1650 F 0 "J7" H 12050 2167 50 0000 C CNN F 1 "Custom Connector 1 / Proto" H 12050 2076 50 0000 C CNN F 2 "unikbd:DIP-16_W7.62mm_Proto" H 12000 1650 50 0001 C CNN F 3 "~" H 12000 1650 50 0001 C CNN 1 12000 1650 1 0 0 -1 $EndComp NoConn ~ 12300 1350 NoConn ~ 12300 1450 NoConn ~ 12300 1550 NoConn ~ 12300 1650 NoConn ~ 12300 1750 NoConn ~ 12300 1850 NoConn ~ 12300 1950 NoConn ~ 12300 2050 NoConn ~ 11800 2050 NoConn ~ 11800 1950 NoConn ~ 11800 1850 NoConn ~ 11800 1750 NoConn ~ 11800 1650 NoConn ~ 11800 1550 NoConn ~ 11800 1450 NoConn ~ 11800 1350 Wire Wire Line 3550 2300 4200 2300 Wire Wire Line 3550 3100 4200 3100 Connection ~ 4200 3100 Wire Wire Line 4200 3100 4200 3700 Wire Wire Line 4200 2300 4200 3100 Wire Wire Line 3550 2200 4600 2200 Wire Wire Line 4600 2200 4600 2800 Wire Wire Line 4600 2800 5850 2800 Wire Wire Line 5800 2900 4500 2900 Wire Wire Line 4500 2900 4500 2600 Wire Wire Line 4500 2600 3550 2600 Wire Wire Line 5750 3000 4400 3000 Wire Wire Line 4400 3000 4400 2400 Wire Wire Line 4400 2400 3550 2400 Wire Wire Line 5700 3100 4300 3100 Wire Wire Line 4300 3100 4300 3000 Wire Wire Line 4300 3000 3550 3000 Text Label 3700 2200 0 50 ~ 0 TCK Text Label 3700 2400 0 50 ~ 0 TDO Text Label 3700 2600 0 50 ~ 0 TMS Text Label 3700 2700 0 50 ~ 0 ~RESET Text Label 3700 3000 0 50 ~ 0 TDI NoConn ~ 3550 2800 NoConn ~ 3550 2900 NoConn ~ 7300 3200 NoConn ~ 7300 3300 NoConn ~ 7300 3400 $Comp L Connector_Generic:Conn_01x25 J8 U 1 1 5F355459 P 11950 4650 F 0 "J8" H 11868 6067 50 0000 C CNN F 1 "Custom Connector 2" H 11868 5976 50 0000 C CNN F 2 "unikbd:ExpansionHeader_1x25_P2.54" H 11950 4650 50 0001 C CNN F 3 "~" H 11950 4650 50 0001 C CNN 1 11950 4650 -1 0 0 -1 $EndComp NoConn ~ 12150 3450 NoConn ~ 12150 3550 NoConn ~ 12150 3650 NoConn ~ 12150 3750 NoConn ~ 12150 3850 NoConn ~ 12150 3950 NoConn ~ 12150 4050 NoConn ~ 12150 4150 NoConn ~ 12150 4250 NoConn ~ 12150 4350 NoConn ~ 12150 4450 NoConn ~ 12150 4550 NoConn ~ 12150 5850 NoConn ~ 12150 5750 NoConn ~ 12150 5650 NoConn ~ 12150 5550 NoConn ~ 12150 5450 NoConn ~ 12150 5350 NoConn ~ 12150 5250 NoConn ~ 12150 5150 NoConn ~ 12150 5050 NoConn ~ 12150 4950 NoConn ~ 12150 4850 NoConn ~ 12150 4750 NoConn ~ 12150 4650 $Comp L Connector_Generic:Conn_01x16 J6 U 1 1 5ED55F89 P 3350 2900 F 0 "J6" H 3268 3817 50 0000 C CNN F 1 "Conn_01x16" H 3268 3726 50 0000 C CNN F 2 "Connector_PinHeader_2.54mm:PinHeader_2x08_P2.54mm_Horizontal" H 3350 2900 50 0001 C CNN F 3 "~" H 3350 2900 50 0001 C CNN 1 3350 2900 -1 0 0 -1 $EndComp Connection ~ 5600 2700 Wire Wire Line 5700 3100 5700 3800 Wire Wire Line 5700 3800 7300 3800 Wire Wire Line 5750 3000 5750 3700 Wire Wire Line 5750 3700 7300 3700 Wire Wire Line 7300 3600 5800 3600 Wire Wire Line 5800 3600 5800 2900 Wire Wire Line 5850 2800 5850 3500 Wire Wire Line 5850 3500 7300 3500 Wire Wire Line 3550 3200 5500 3200 Wire Wire Line 5500 3200 5500 4000 Wire Wire Line 5500 4000 6250 4000 Wire Wire Line 6250 4000 6250 5200 Wire Wire Line 6250 5200 7300 5200 Wire Wire Line 5200 3500 5200 4100 Wire Wire Line 5200 4100 6150 4100 Wire Wire Line 6150 4100 6150 5100 Wire Wire Line 6150 5100 7300 5100 Wire Wire Line 5200 3500 3550 3500 Wire Wire Line 3550 3300 4850 3300 Wire Wire Line 4850 3300 4850 2500 Connection ~ 4850 2500 Wire Wire Line 3550 3700 4200 3700 Connection ~ 4200 3700 Wire Wire Line 4200 3700 4200 3850 Wire Wire Line 3550 3600 4050 3600 Wire Wire Line 4050 3600 4050 2700 Connection ~ 4050 2700 Wire Wire Line 4050 2700 5600 2700 Wire Wire Line 3550 3400 5350 3400 Wire Wire Line 5350 3400 5350 4050 Wire Wire Line 5350 4050 6200 4050 Wire Wire Line 6200 4050 6200 5000 Wire Wire Line 6200 5000 7300 5000 Text Label 3700 3400 0 50 ~ 0 SCK Text Label 3700 3200 0 50 ~ 0 MISO Text Label 3700 3500 0 50 ~ 0 MOSI Wire Bus Line 2500 1200 2500 4600 Wire Bus Line 6000 4600 6000 7700 Wire Bus Line 2500 4600 2500 8400 Wire Bus Line 13500 2200 13500 8200 Wire Bus Line 15900 2200 15900 8200 Wire Bus Line 10700 2600 10700 8200 $EndSCHEMATC