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EESchema Schematic File Version 4
EELAYER 30 0
EELAYER END
$Descr A3 16535 11693
encoding utf-8
Sheet 1 1
Title "68k nano single board computer"
Date "2020-06-24"
Rev "1"
Comp "Matt Sarnoff (msarnoff.org)"
Comment1 ""
Comment2 ""
Comment3 ""
Comment4 ""
$EndDescr
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$EndComp
$Comp
L power:GND #PWR0110
U 1 1 5ED999E0
P 7325 5550
F 0 "#PWR0110" H 7325 5300 50 0001 C CNN
F 1 "GND" H 7325 5400 50 0000 C CNN
F 2 "" H 7325 5550 50 0001 C CNN
F 3 "" H 7325 5550 50 0001 C CNN
1 7325 5550
1 0 0 -1
$EndComp
Text Label 7900 4250 2 50 ~ 0
D15
Text Label 7900 4150 2 50 ~ 0
D14
Text Label 7900 4050 2 50 ~ 0
D13
Text Label 7900 3950 2 50 ~ 0
D12
Text Label 7900 3850 2 50 ~ 0
D11
Text Label 7900 3750 2 50 ~ 0
D10
Text Label 7900 3650 2 50 ~ 0
D9
Text Label 7900 3550 2 50 ~ 0
D8
Text Label 7900 1850 2 50 ~ 0
D7
Text Label 7900 1750 2 50 ~ 0
D6
Text Label 7900 1650 2 50 ~ 0
D5
Text Label 7900 1550 2 50 ~ 0
D4
Text Label 7900 1450 2 50 ~ 0
D3
Text Label 7900 1350 2 50 ~ 0
D2
Text Label 7900 1250 2 50 ~ 0
D1
Text Label 7900 1150 2 50 ~ 0
D0
Text Label 6750 4950 0 50 ~ 0
A15
Text Label 6750 4850 0 50 ~ 0
A14
Text Label 6750 4750 0 50 ~ 0
A13
Text Label 6750 4650 0 50 ~ 0
A12
Text Label 6750 4550 0 50 ~ 0
A11
Text Label 6750 4450 0 50 ~ 0
A10
Text Label 6750 4350 0 50 ~ 0
A9
Text Label 6750 4250 0 50 ~ 0
A8
Text Label 6750 4150 0 50 ~ 0
A7
Text Label 6750 4050 0 50 ~ 0
A6
Text Label 6750 3950 0 50 ~ 0
A5
Text Label 6750 3850 0 50 ~ 0
A4
Text Label 6750 3750 0 50 ~ 0
A3
Text Label 6750 3650 0 50 ~ 0
A2
Text Label 6750 3550 0 50 ~ 0
A1
Wire Wire Line
6925 4950 6750 4950
Wire Wire Line
6925 4850 6750 4850
Wire Wire Line
6925 4750 6750 4750
Wire Wire Line
6925 4650 6750 4650
Wire Wire Line
6925 4550 6750 4550
Wire Wire Line
6925 4450 6750 4450
Wire Wire Line
6925 4350 6750 4350
Wire Wire Line
6925 4250 6750 4250
Wire Wire Line
6925 4150 6750 4150
Wire Wire Line
6925 4050 6750 4050
Wire Wire Line
6925 3950 6750 3950
Wire Wire Line
6925 3850 6750 3850
Wire Wire Line
6925 3750 6750 3750
Wire Wire Line
6925 3650 6750 3650
Wire Wire Line
6925 3550 6750 3550
Wire Wire Line
6175 5050 6350 5050
Wire Wire Line
6175 4950 6350 4950
Wire Wire Line
6175 4850 6350 4850
Wire Wire Line
6175 4750 6350 4750
Wire Wire Line
6175 4650 6350 4650
Wire Wire Line
6175 4550 6350 4550
Wire Wire Line
6175 4450 6350 4450
Wire Wire Line
6175 4350 6350 4350
Wire Wire Line
6175 4250 6350 4250
Wire Wire Line
6175 4150 6350 4150
Wire Wire Line
6175 4050 6350 4050
Wire Wire Line
6175 3950 6350 3950
Wire Wire Line
7725 4250 7900 4250
Wire Wire Line
7725 4150 7900 4150
Wire Wire Line
7725 4050 7900 4050
Wire Wire Line
7725 3950 7900 3950
Wire Wire Line
7725 3850 7900 3850
Wire Wire Line
7725 3750 7900 3750
Wire Wire Line
7725 3650 7900 3650
Wire Wire Line
7725 3550 7900 3550
$Comp
L Memory_EEPROM:28C256 U7
U 1 1 5ED5DF46
P 7325 4450
F 0 "U7" H 7450 3975 50 0000 C CNN
F 1 "28C256" H 7450 3875 50 0000 C CNN
F 2 "Package_DIP:DIP-28_W15.24mm_Socket" H 7325 4450 50 0001 C CNN
F 3 "http://ww1.microchip.com/downloads/en/DeviceDoc/doc0006.pdf" H 7325 4450 50 0001 C CNN
1 7325 4450
1 0 0 -1
$EndComp
Wire Wire Line
7725 1850 7900 1850
Wire Wire Line
7725 1750 7900 1750
Wire Wire Line
7725 1650 7900 1650
Wire Wire Line
7725 1550 7900 1550
Wire Wire Line
7725 1450 7900 1450
Wire Wire Line
7725 1350 7900 1350
Wire Wire Line
7725 1250 7900 1250
Wire Wire Line
7725 1150 7900 1150
Wire Wire Line
6175 3850 6350 3850
Wire Wire Line
6175 3750 6350 3750
Wire Wire Line
6175 3650 6350 3650
Wire Wire Line
6175 3550 6350 3550
Text Label 6175 2550 0 50 ~ 0
A15
Text Label 6175 2450 0 50 ~ 0
A14
Text Label 6175 2350 0 50 ~ 0
A13
Text Label 6175 2250 0 50 ~ 0
A12
Text Label 6175 2150 0 50 ~ 0
A11
Text Label 6175 2050 0 50 ~ 0
A10
Text Label 6175 1950 0 50 ~ 0
A9
Text Label 6175 1850 0 50 ~ 0
A8
Text Label 6175 1750 0 50 ~ 0
A7
Text Label 6175 1650 0 50 ~ 0
A6
Text Label 6175 1550 0 50 ~ 0
A5
Text Label 6175 1450 0 50 ~ 0
A4
Text Label 6175 1350 0 50 ~ 0
A3
Text Label 6175 1250 0 50 ~ 0
A2
Text Label 6175 1150 0 50 ~ 0
A1
Wire Wire Line
6925 2550 6175 2550
Wire Wire Line
6175 2450 6925 2450
Wire Wire Line
6925 2350 6175 2350
Wire Wire Line
6175 2250 6925 2250
Wire Wire Line
6925 2150 6175 2150
Wire Wire Line
6175 2050 6925 2050
Wire Wire Line
6175 1950 6925 1950
Wire Wire Line
6925 1850 6175 1850
Wire Wire Line
6175 1750 6925 1750
Wire Wire Line
6925 1650 6175 1650
Wire Wire Line
6175 1550 6925 1550
Wire Wire Line
6925 1450 6175 1450
Wire Wire Line
6175 1350 6925 1350
Wire Wire Line
6175 1250 6925 1250
Wire Wire Line
6175 1150 6925 1150
$Comp
L Memory_EEPROM:28C256 U5
U 1 1 5ED45B8E
P 7325 2050
F 0 "U5" H 7450 1575 50 0000 C CNN
F 1 "28C256" H 7450 1475 50 0000 C CNN
F 2 "Package_DIP:DIP-28_W15.24mm_Socket" H 7325 2050 50 0001 C CNN
F 3 "http://ww1.microchip.com/downloads/en/DeviceDoc/doc0006.pdf" H 7325 2050 50 0001 C CNN
1 7325 2050
1 0 0 -1
$EndComp
NoConn ~ 4175 2350
NoConn ~ 4175 2450
NoConn ~ 4175 2550
NoConn ~ 4175 2950
NoConn ~ 4175 2850
NoConn ~ 4175 1950
Connection ~ 3950 1850
Connection ~ 3950 1650
Wire Wire Line
3950 1850 3950 1650
Wire Wire Line
4175 1550 3950 1550
Wire Wire Line
4025 1450 4175 1450
Wire Wire Line
3950 1650 3950 1550
Wire Wire Line
4175 1650 3950 1650
$Comp
L power:VCC #PWR0111
U 1 1 5ED48274
P 4175 3950
F 0 "#PWR0111" H 4175 3800 50 0001 C CNN
F 1 "VCC" H 4175 4100 50 0000 C CNN
F 2 "" H 4175 3950 50 0001 C CNN
F 3 "" H 4175 3950 50 0001 C CNN
1 4175 3950
1 0 0 -1
$EndComp
Wire Wire Line
4175 3050 4000 3050
Wire Wire Line
3950 2050 3950 1850
Wire Wire Line
4175 2050 3950 2050
Wire Wire Line
4175 1850 3950 1850
$Comp
L power:VCC #PWR0112
U 1 1 5ED468BA
P 3950 1375
F 0 "#PWR0112" H 3950 1225 50 0001 C CNN
F 1 "VCC" H 3950 1525 50 0000 C CNN
F 2 "" H 3950 1375 50 0001 C CNN
F 3 "" H 3950 1375 50 0001 C CNN
1 3950 1375
1 0 0 -1
$EndComp
Wire Wire Line
5225 950 5175 950
Connection ~ 5225 950
$Comp
L power:VCC #PWR0113
U 1 1 5ED460A7
P 5225 950
F 0 "#PWR0113" H 5225 800 50 0001 C CNN
F 1 "VCC" H 5225 1100 50 0000 C CNN
F 2 "" H 5225 950 50 0001 C CNN
F 3 "" H 5225 950 50 0001 C CNN
1 5225 950
1 0 0 -1
$EndComp
Wire Wire Line
5275 950 5225 950
$Comp
L power:GND #PWR0114
U 1 1 5ED451FF
P 4175 4150
F 0 "#PWR0114" H 4175 3900 50 0001 C CNN
F 1 "GND" H 4175 4000 50 0000 C CNN
F 2 "" H 4175 4150 50 0001 C CNN
F 3 "" H 4175 4150 50 0001 C CNN
1 4175 4150
1 0 0 -1
$EndComp
Connection ~ 5225 5750
Wire Wire Line
5275 5750 5225 5750
Wire Wire Line
5175 5750 5225 5750
$Comp
L power:GND #PWR0115
U 1 1 5ED441C4
P 5225 5750
F 0 "#PWR0115" H 5225 5500 50 0001 C CNN
F 1 "GND" H 5225 5600 50 0000 C CNN
F 2 "" H 5225 5750 50 0001 C CNN
F 3 "" H 5225 5750 50 0001 C CNN
1 5225 5750
1 0 0 -1
$EndComp
$Comp
L CPU_NXP_68000:68000D U3
U 1 1 5ED415C8
P 5175 3350
F 0 "U3" H 5175 3375 50 0000 C CNN
F 1 "TMP68HC000P-12" H 5175 3250 50 0000 C CNN
F 2 "Package_DIP:DIP-64_W22.86mm_Socket" H 5175 3350 50 0001 C CNN
F 3 "https://www.nxp.com/docs/en/reference-manual/MC68000UM.pdf" H 5175 3350 50 0001 C CNN
1 5175 3350
1 0 0 -1
$EndComp
$Comp
L 74xx:74HC14 U2
U 3 1 5F039004
P 2075 4650
F 0 "U2" H 2150 4875 50 0000 C CNN
F 1 "74HC14" H 2150 4800 50 0000 C CNN
F 2 "Package_DIP:DIP-14_W7.62mm_Socket" H 2075 4650 50 0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74HC14" H 2075 4650 50 0001 C CNN
3 2075 4650
1 0 0 -1
$EndComp
$Comp
L 74xx:74HC14 U2
U 2 1 5F069AD6
P 2675 4650
F 0 "U2" H 2750 4875 50 0000 C CNN
F 1 "74HC14" H 2750 4800 50 0000 C CNN
F 2 "Package_DIP:DIP-14_W7.62mm_Socket" H 2675 4650 50 0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74HC14" H 2675 4650 50 0001 C CNN
2 2675 4650
1 0 0 -1
$EndComp
$Comp
L Device:R R2
U 1 1 5F0CA967
P 3275 4500
F 0 "R2" H 3325 4500 50 0000 L CNN
F 1 "10k" V 3275 4425 50 0000 L CNN
F 2 "Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal" V 3205 4500 50 0001 C CNN
F 3 "~" H 3275 4500 50 0001 C CNN
1 3275 4500
1 0 0 -1
$EndComp
$Comp
L power:VCC #PWR0116
U 1 1 5F0F8C05
P 3275 4350
F 0 "#PWR0116" H 3275 4200 50 0001 C CNN
F 1 "VCC" H 3275 4500 50 0000 C CNN
F 2 "" H 3275 4350 50 0001 C CNN
F 3 "" H 3275 4350 50 0001 C CNN
1 3275 4350
1 0 0 -1
$EndComp
$Comp
L Device:D_Schottky D1
U 1 1 5F110B74
P 3125 4650
F 0 "D1" H 3125 4550 50 0000 C CNN
F 1 "1N5817" H 3125 4750 50 0000 C CNN
F 2 "Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal" H 3125 4650 50 0001 C CNN
F 3 "~" H 3125 4650 50 0001 C CNN
1 3125 4650
1 0 0 1
$EndComp
Connection ~ 3275 4650
Wire Wire Line
3275 4650 4175 4650
$Comp
L Device:R R3
U 1 1 5F26212E
P 1625 4650
F 0 "R3" V 1525 4600 50 0000 L CNN
F 1 "1k" V 1625 4600 50 0000 L CNN
F 2 "Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal" V 1555 4650 50 0001 C CNN
F 3 "~" H 1625 4650 50 0001 C CNN
1 1625 4650
0 1 1 0
$EndComp
$Comp
L Device:CP1 C11
U 1 1 5F27AF00
P 1775 4950
F 0 "C11" H 1890 4996 50 0000 L CNN
F 1 "10uF" H 1890 4905 50 0000 L CNN
F 2 "Capacitor_THT:CP_Radial_D5.0mm_P2.50mm" H 1775 4950 50 0001 C CNN
F 3 "~" H 1775 4950 50 0001 C CNN
1 1775 4950
1 0 0 -1
$EndComp
Wire Wire Line
1775 4800 1775 4650
Connection ~ 1775 4650
$Comp
L power:GND #PWR0118
U 1 1 5F2A9ECC
P 1775 5100
F 0 "#PWR0118" H 1775 4850 50 0001 C CNN
F 1 "GND" H 1775 4950 50 0000 C CNN
F 2 "" H 1775 5100 50 0001 C CNN
F 3 "" H 1775 5100 50 0001 C CNN
1 1775 5100
1 0 0 -1
$EndComp