+++ /dev/null
-EESchema Schematic File Version 4
-EELAYER 30 0
-EELAYER END
-$Descr A4 11693 8268
-encoding utf-8
-Sheet 1 2
-Title "ROM development board"
-Date "2020-05-18"
-Rev "1"
-Comp ""
-Comment1 ""
-Comment2 ""
-Comment3 "License: Creative Commons Attribution Share-Alike (CC BY-SA)"
-Comment4 "Copyright (C) 2020 John Tsiombikas <nuclear@member.fsf.org>"
-$EndDescr
-$Comp
-L Connector:USB_B_Micro J2
-U 1 1 5EC163C7
-P 1600 5100
-F 0 "J2" H 1370 5089 50 0000 R CNN
-F 1 "USB_B_Micro" H 1370 4998 50 0000 R CNN
-F 2 "Connector_USB:USB_Micro-B_Molex-105017-0001" H 1750 5050 50 0001 C CNN
-F 3 "~" H 1750 5050 50 0001 C CNN
- 1 1600 5100
- 1 0 0 -1
-$EndComp
-$Comp
-L Device:Crystal_Small Y1
-U 1 1 5EC18BB4
-P 1550 2450
-F 0 "Y1" V 1550 2350 50 0000 R CNN
-F 1 "14.7456" V 1700 2600 50 0000 R CNN
-F 2 "Crystal:Crystal_SMD_ECS_CSM3X-2Pin_7.6x4.1mm" H 1550 2450 50 0001 C CNN
-F 3 "~" H 1550 2450 50 0001 C CNN
- 1 1550 2450
- 0 1 1 0
-$EndComp
-$Comp
-L power:GND #PWR02
-U 1 1 5EC26DD6
-P 1100 2550
-F 0 "#PWR02" H 1100 2300 50 0001 C CNN
-F 1 "GND" H 1100 2400 50 0000 C CNN
-F 2 "" H 1100 2550 50 0001 C CNN
-F 3 "" H 1100 2550 50 0001 C CNN
- 1 1100 2550
- 1 0 0 -1
-$EndComp
-$Comp
-L Device:C_Small C2
-U 1 1 5EC2AB68
-P 1300 2550
-F 0 "C2" V 1250 2450 50 0000 C CNN
-F 1 "22pF" V 1450 2550 50 0000 C CNN
-F 2 "Capacitor_SMD:C_0805_2012Metric_Pad1.15x1.40mm_HandSolder" H 1300 2550 50 0001 C CNN
-F 3 "~" H 1300 2550 50 0001 C CNN
- 1 1300 2550
- 0 1 1 0
-$EndComp
-$Comp
-L Device:C_Small C1
-U 1 1 5EC2D7FC
-P 1300 2350
-F 0 "C1" V 1350 2250 50 0000 C CNN
-F 1 "22pF" V 1450 2350 50 0000 C CNN
-F 2 "Capacitor_SMD:C_0805_2012Metric_Pad1.15x1.40mm_HandSolder" H 1300 2350 50 0001 C CNN
-F 3 "~" H 1300 2350 50 0001 C CNN
- 1 1300 2350
- 0 1 -1 0
-$EndComp
-$Comp
-L romdev:sram_um61512ak U6
-U 1 1 5EC358D5
-P 5550 2150
-F 0 "U6" H 5650 3250 60 0000 C CNN
-F 1 "sram_um61512ak" V 5550 2200 60 0000 C CNN
-F 2 "Package_DIP:DIP-32_W7.62mm" H 5450 1350 60 0001 C CNN
-F 3 "" H 5450 1350 60 0000 C CNN
- 1 5550 2150
- 1 0 0 -1
-$EndComp
-$Comp
-L 74xx:74LS595 U4
-U 1 1 5EC37092
-P 4050 1550
-F 0 "U4" H 4150 2100 50 0000 C CNN
-F 1 "74HCT595" H 3800 900 50 0000 C CNN
-F 2 "Package_SO:SOIC-16_3.9x9.9mm_P1.27mm" H 4050 1550 50 0001 C CNN
-F 3 "http://www.ti.com/lit/gpn/sn74ls595" H 4050 1550 50 0001 C CNN
- 1 4050 1550
- 1 0 0 -1
-$EndComp
-$Comp
-L romdev:mcp2221 U2
-U 1 1 5EC41AB3
-P 2700 5500
-F 0 "U2" H 2800 6000 50 0000 C CNN
-F 1 "mcp2221" V 2700 5500 50 0000 C CNN
-F 2 "Package_SO:SOIC-14_3.9x8.7mm_P1.27mm" H 2700 5200 50 0001 C CNN
-F 3 "" H 2700 5200 50 0001 C CNN
- 1 2700 5500
- -1 0 0 -1
-$EndComp
-Wire Wire Line
- 1900 5100 2200 5100
-Wire Wire Line
- 2200 5200 1900 5200
-Wire Wire Line
- 1900 4900 2300 4900
-Wire Wire Line
- 2300 4900 2300 4850
-Wire Wire Line
- 2300 4850 2700 4850
-$Comp
-L power:VCC #PWR08
-U 1 1 5EC4ADDD
-P 2700 4850
-F 0 "#PWR08" H 2700 4700 50 0001 C CNN
-F 1 "VCC" H 2700 5000 50 0000 C CNN
-F 2 "" H 2700 4850 50 0001 C CNN
-F 3 "" H 2700 4850 50 0001 C CNN
- 1 2700 4850
- -1 0 0 -1
-$EndComp
-Connection ~ 2700 4850
-$Comp
-L power:GND #PWR09
-U 1 1 5EC4C3CB
-P 2700 6150
-F 0 "#PWR09" H 2700 5900 50 0001 C CNN
-F 1 "GND" H 2700 6000 50 0000 C CNN
-F 2 "" H 2700 6150 50 0001 C CNN
-F 3 "" H 2700 6150 50 0001 C CNN
- 1 2700 6150
- -1 0 0 -1
-$EndComp
-$Comp
-L Device:C_Small C4
-U 1 1 5EC4CE51
-P 2150 6050
-F 0 "C4" H 2050 6100 50 0000 R CNN
-F 1 "0.1uF" H 2200 6200 50 0000 R CNN
-F 2 "Capacitor_SMD:C_0805_2012Metric_Pad1.15x1.40mm_HandSolder" H 2150 6050 50 0001 C CNN
-F 3 "~" H 2150 6050 50 0001 C CNN
- 1 2150 6050
- -1 0 0 1
-$EndComp
-Connection ~ 2700 6150
-$Comp
-L Device:C_Small C3
-U 1 1 5EC560E6
-P 2000 6050
-F 0 "C3" H 1900 6100 50 0000 R CNN
-F 1 "0.1uF" H 2050 6200 50 0000 R CNN
-F 2 "Capacitor_SMD:C_0805_2012Metric_Pad1.15x1.40mm_HandSolder" H 2000 6050 50 0001 C CNN
-F 3 "~" H 2000 6050 50 0001 C CNN
- 1 2000 6050
- 1 0 0 1
-$EndComp
-Wire Wire Line
- 2700 6150 2150 6150
-Connection ~ 2150 6150
-Wire Wire Line
- 2150 6150 2000 6150
-Wire Wire Line
- 2000 5950 2000 5900
-Wire Wire Line
- 2000 5900 2150 5900
-Wire Wire Line
- 2150 5950 2150 5900
-Connection ~ 2150 5900
-Wire Wire Line
- 2150 5900 2200 5900
-NoConn ~ 1500 5500
-$Comp
-L power:GND #PWR05
-U 1 1 5EC5CA0E
-P 1600 5500
-F 0 "#PWR05" H 1600 5250 50 0001 C CNN
-F 1 "GND" H 1600 5350 50 0000 C CNN
-F 2 "" H 1600 5500 50 0001 C CNN
-F 3 "" H 1600 5500 50 0001 C CNN
- 1 1600 5500
- -1 0 0 -1
-$EndComp
-Wire Wire Line
- 2200 5400 1850 5400
-Wire Wire Line
- 1850 5400 1850 5750
-Wire Wire Line
- 2200 5500 1900 5500
-Wire Wire Line
- 1900 5500 1900 5900
-Wire Wire Line
- 1900 5900 1400 5900
-Wire Wire Line
- 1850 5750 1400 5750
-$Comp
-L Device:LED D2
-U 1 1 5EC5A868
-P 1250 5900
-F 0 "D2" H 1250 6100 50 0000 C CNN
-F 1 "TxLED" H 1250 6000 50 0000 C CNN
-F 2 "LED_SMD:LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder" H 1250 5900 50 0001 C CNN
-F 3 "~" H 1250 5900 50 0001 C CNN
- 1 1250 5900
- -1 0 0 1
-$EndComp
-$Comp
-L Device:LED D1
-U 1 1 5EC5A43E
-P 1250 5750
-F 0 "D1" H 1250 5550 50 0000 C CNN
-F 1 "RxLED" H 1250 5650 50 0000 C CNN
-F 2 "LED_SMD:LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder" H 1250 5750 50 0001 C CNN
-F 3 "~" H 1250 5750 50 0001 C CNN
- 1 1250 5750
- -1 0 0 1
-$EndComp
-$Comp
-L power:VCC #PWR01
-U 1 1 5EC76B82
-P 750 5650
-F 0 "#PWR01" H 750 5500 50 0001 C CNN
-F 1 "VCC" H 750 5800 50 0000 C CNN
-F 2 "" H 750 5650 50 0001 C CNN
-F 3 "" H 750 5650 50 0001 C CNN
- 1 750 5650
- -1 0 0 -1
-$EndComp
-$Comp
-L Device:R R1
-U 1 1 5EC77908
-P 900 5750
-F 0 "R1" V 800 5750 50 0000 C CNN
-F 1 "330R" V 900 5750 50 0000 C CNN
-F 2 "Resistor_SMD:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder" V 830 5750 50 0001 C CNN
-F 3 "~" H 900 5750 50 0001 C CNN
- 1 900 5750
- 0 -1 1 0
-$EndComp
-$Comp
-L Device:R R2
-U 1 1 5EC77DF4
-P 900 5900
-F 0 "R2" V 800 5900 50 0000 C CNN
-F 1 "330R" V 900 5900 50 0000 C CNN
-F 2 "Resistor_SMD:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder" V 830 5900 50 0001 C CNN
-F 3 "~" H 900 5900 50 0001 C CNN
- 1 900 5900
- 0 1 -1 0
-$EndComp
-Wire Wire Line
- 1050 5750 1100 5750
-Wire Wire Line
- 1050 5900 1100 5900
-Wire Wire Line
- 750 5650 750 5750
-Connection ~ 750 5750
-Wire Wire Line
- 750 5750 750 5900
-NoConn ~ 2200 5600
-NoConn ~ 2200 5700
-NoConn ~ 3200 5400
-NoConn ~ 3200 5500
-Wire Wire Line
- 3200 5650 3400 5650
-Text Label 3400 5650 2 50 ~ 0
-~RST
-Text Label 2850 3150 0 50 ~ 0
-~RST
-Wire Wire Line
- 2800 2150 3050 2150
-Wire Wire Line
- 2800 3650 3150 3650
-Wire Wire Line
- 2800 3750 3150 3750
-Wire Wire Line
- 2800 3850 3150 3850
-Wire Wire Line
- 2800 3950 3150 3950
-Wire Wire Line
- 2800 4050 3150 4050
-Wire Wire Line
- 2800 4150 3150 4150
-Text Label 2850 3650 0 50 ~ 0
-D2
-Text Label 2850 3750 0 50 ~ 0
-D3
-Text Label 2850 3850 0 50 ~ 0
-D4
-Text Label 2850 3950 0 50 ~ 0
-D5
-Text Label 2850 4050 0 50 ~ 0
-D6
-Text Label 2850 4150 0 50 ~ 0
-D7
-Text Label 2850 1950 0 50 ~ 0
-~SS
-$Comp
-L 74xx:74HC244 U9
-U 1 1 5ECDEAC2
-P 7200 2550
-F 0 "U9" H 7300 3200 50 0000 C CNN
-F 1 "74HCT244" H 7400 1900 50 0000 C CNN
-F 2 "Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm" H 7200 2550 50 0001 C CNN
-F 3 "https://assets.nexperia.com/documents/data-sheet/74HC_HCT244.pdf" H 7200 2550 50 0001 C CNN
- 1 7200 2550
- 1 0 0 -1
-$EndComp
-Text Label 2850 1850 0 50 ~ 0
-D1
-Text Label 2850 1750 0 50 ~ 0
-D0
-Wire Wire Line
- 2800 1850 3150 1850
-Wire Wire Line
- 2800 1750 3150 1750
-$Comp
-L romdev:ATmega328P-AU U1
-U 1 1 5ED09330
-P 2200 2950
-F 0 "U1" H 2350 1500 50 0000 C CNN
-F 1 "ATmega328P-AU" V 2050 2750 50 0000 C CNN
-F 2 "Package_QFP:TQFP-32_7x7mm_P0.8mm" H 2200 3050 50 0001 C CIN
-F 3 "http://ww1.microchip.com/downloads/en/DeviceDoc/ATmega328_P%20AVR%20MCU%20with%20picoPower%20Technology%20Data%20Sheet%2040001984A.pdf" H 2200 2950 50 0001 C CNN
- 1 2200 2950
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 1550 2350 1600 2350
-Wire Wire Line
- 1550 2550 1600 2550
-Wire Wire Line
- 1400 2350 1550 2350
-Connection ~ 1550 2350
-Wire Wire Line
- 1400 2550 1550 2550
-Connection ~ 1550 2550
-Wire Wire Line
- 1200 2550 1100 2550
-Wire Wire Line
- 1100 2550 1100 2350
-Wire Wire Line
- 1100 2350 1200 2350
-Connection ~ 1100 2550
-NoConn ~ 1600 1750
-NoConn ~ 1600 1950
-NoConn ~ 1600 2050
-$Comp
-L power:VCC #PWR06
-U 1 1 5ED3898C
-P 2200 1450
-F 0 "#PWR06" H 2200 1300 50 0001 C CNN
-F 1 "VCC" H 2200 1600 50 0000 C CNN
-F 2 "" H 2200 1450 50 0001 C CNN
-F 3 "" H 2200 1450 50 0001 C CNN
- 1 2200 1450
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 2200 1450 2300 1450
-Connection ~ 2200 1450
-$Comp
-L power:GND #PWR07
-U 1 1 5ED3B644
-P 2200 4450
-F 0 "#PWR07" H 2200 4200 50 0001 C CNN
-F 1 "GND" H 2200 4300 50 0000 C CNN
-F 2 "" H 2200 4450 50 0001 C CNN
-F 3 "" H 2200 4450 50 0001 C CNN
- 1 2200 4450
- 1 0 0 -1
-$EndComp
-Entry Wire Line
- 3150 1850 3250 1750
-Entry Wire Line
- 3150 1750 3250 1650
-Entry Wire Line
- 3150 4150 3250 4250
-Entry Wire Line
- 3150 4050 3250 4150
-Entry Wire Line
- 3150 3950 3250 4050
-Entry Wire Line
- 3150 3850 3250 3950
-Entry Wire Line
- 3150 3750 3250 3850
-Entry Wire Line
- 3150 3650 3250 3750
-$Comp
-L power:VCC #PWR013
-U 1 1 5ED7402F
-P 4050 950
-F 0 "#PWR013" H 4050 800 50 0001 C CNN
-F 1 "VCC" H 4050 1100 50 0000 C CNN
-F 2 "" H 4050 950 50 0001 C CNN
-F 3 "" H 4050 950 50 0001 C CNN
- 1 4050 950
- 1 0 0 -1
-$EndComp
-$Comp
-L power:GND #PWR014
-U 1 1 5EDA0BB4
-P 4050 2250
-F 0 "#PWR014" H 4050 2000 50 0001 C CNN
-F 1 "GND" H 4050 2100 50 0000 C CNN
-F 2 "" H 4050 2250 50 0001 C CNN
-F 3 "" H 4050 2250 50 0001 C CNN
- 1 4050 2250
- 1 0 0 -1
-$EndComp
-$Comp
-L 74xx:74LS595 U5
-U 1 1 5EDE23C3
-P 4050 3250
-F 0 "U5" H 4150 3800 50 0000 C CNN
-F 1 "74HCT595" H 3800 2600 50 0000 C CNN
-F 2 "Package_SO:SOIC-16_3.9x9.9mm_P1.27mm" H 4050 3250 50 0001 C CNN
-F 3 "http://www.ti.com/lit/gpn/sn74ls595" H 4050 3250 50 0001 C CNN
- 1 4050 3250
- 1 0 0 -1
-$EndComp
-$Comp
-L power:VCC #PWR015
-U 1 1 5EDE23CD
-P 4050 2650
-F 0 "#PWR015" H 4050 2500 50 0001 C CNN
-F 1 "VCC" H 4050 2800 50 0000 C CNN
-F 2 "" H 4050 2650 50 0001 C CNN
-F 3 "" H 4050 2650 50 0001 C CNN
- 1 4050 2650
- 1 0 0 -1
-$EndComp
-$Comp
-L power:GND #PWR016
-U 1 1 5EDE23D7
-P 4050 3950
-F 0 "#PWR016" H 4050 3700 50 0001 C CNN
-F 1 "GND" H 4050 3800 50 0000 C CNN
-F 2 "" H 4050 3950 50 0001 C CNN
-F 3 "" H 4050 3950 50 0001 C CNN
- 1 4050 3950
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 3400 2050 3400 1150
-Wire Wire Line
- 3400 1150 3650 1150
-Wire Wire Line
- 3450 1350 3650 1350
-Wire Wire Line
- 3450 3050 3650 3050
-Connection ~ 3450 2250
-Wire Wire Line
- 2800 1950 3500 1950
-Wire Wire Line
- 3500 1650 3650 1650
-Wire Wire Line
- 3500 3350 3650 3350
-Connection ~ 3500 1950
-Wire Wire Line
- 3650 1450 3600 1450
-Wire Wire Line
- 3600 1450 3600 950
-Wire Wire Line
- 3600 950 4050 950
-Connection ~ 4050 950
-Wire Wire Line
- 3650 3150 3550 3150
-Wire Wire Line
- 3550 3150 3550 2650
-Wire Wire Line
- 3550 2650 4050 2650
-Connection ~ 4050 2650
-Text Label 4500 1150 0 50 ~ 0
-A0
-Text Label 4500 1250 0 50 ~ 0
-A1
-Text Label 4500 1350 0 50 ~ 0
-A2
-Text Label 4500 1450 0 50 ~ 0
-A3
-Text Label 4500 1550 0 50 ~ 0
-A4
-Text Label 4500 1650 0 50 ~ 0
-A5
-Text Label 4500 1750 0 50 ~ 0
-A6
-Text Label 4500 1850 0 50 ~ 0
-A7
-Wire Wire Line
- 3650 2850 3650 2450
-Wire Wire Line
- 3650 2450 4450 2450
-Wire Wire Line
- 4450 2450 4450 2050
-Text Label 4500 2850 0 50 ~ 0
-A8
-Text Label 4500 2950 0 50 ~ 0
-A9
-Text Label 4500 3050 0 50 ~ 0
-A10
-Text Label 4500 3150 0 50 ~ 0
-A11
-Text Label 4500 3250 0 50 ~ 0
-A12
-Text Label 4500 3350 0 50 ~ 0
-A13
-Text Label 4500 3450 0 50 ~ 0
-A14
-Text Label 4500 3550 0 50 ~ 0
-A15
-NoConn ~ 4450 3750
-Wire Wire Line
- 3300 3550 3300 5100
-Text Label 2850 3450 0 50 ~ 0
-RX
-Wire Wire Line
- 3300 5100 3200 5100
-Wire Wire Line
- 3350 5200 3200 5200
-Text Label 2850 3550 0 50 ~ 0
-TX
-Entry Wire Line
- 6300 1850 6400 1750
-Entry Wire Line
- 6300 1750 6400 1650
-Entry Wire Line
- 6300 1650 6400 1550
-Entry Wire Line
- 6300 1550 6400 1450
-Entry Wire Line
- 6300 1450 6400 1350
-Entry Wire Line
- 6300 1350 6400 1250
-Entry Wire Line
- 6300 1250 6400 1150
-Entry Wire Line
- 6300 1150 6400 1050
-Wire Wire Line
- 6100 1150 6300 1150
-Wire Wire Line
- 6100 1250 6300 1250
-Wire Wire Line
- 6100 1350 6300 1350
-Wire Wire Line
- 6100 1450 6300 1450
-Wire Wire Line
- 6100 1550 6300 1550
-Wire Wire Line
- 6100 1650 6300 1650
-Wire Wire Line
- 6100 1750 6300 1750
-Wire Wire Line
- 6100 1850 6300 1850
-Text Label 6100 1150 0 50 ~ 0
-D0
-Text Label 6100 1250 0 50 ~ 0
-D1
-Text Label 6100 1350 0 50 ~ 0
-D2
-Text Label 6100 1450 0 50 ~ 0
-D3
-Text Label 6100 1550 0 50 ~ 0
-D4
-Text Label 6100 1650 0 50 ~ 0
-D5
-Text Label 6100 1750 0 50 ~ 0
-D6
-Text Label 6100 1850 0 50 ~ 0
-D7
-Wire Bus Line
- 3250 650 6400 650
-$Comp
-L 74xx:74HC244 U8
-U 1 1 5EFA2737
-P 5800 4350
-F 0 "U8" H 5700 5000 50 0000 C CNN
-F 1 "74HCT244" H 5600 3700 50 0000 C CNN
-F 2 "Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm" H 5800 4350 50 0001 C CNN
-F 3 "https://assets.nexperia.com/documents/data-sheet/74HC_HCT244.pdf" H 5800 4350 50 0001 C CNN
- 1 5800 4350
- -1 0 0 -1
-$EndComp
-Wire Wire Line
- 4450 1150 4650 1150
-Wire Wire Line
- 4450 1250 4650 1250
-Wire Wire Line
- 4450 1350 4650 1350
-Wire Wire Line
- 4450 1450 4650 1450
-Wire Wire Line
- 4450 1550 4650 1550
-Wire Wire Line
- 4450 1650 4650 1650
-Wire Wire Line
- 4450 1750 4650 1750
-Wire Wire Line
- 4450 1850 4650 1850
-Wire Wire Line
- 4450 2850 4650 2850
-Wire Wire Line
- 4450 2950 4650 2950
-Wire Wire Line
- 4450 3050 4650 3050
-Wire Wire Line
- 4450 3150 4650 3150
-Wire Wire Line
- 4450 3250 4650 3250
-Wire Wire Line
- 4450 3350 4650 3350
-Wire Wire Line
- 4450 3450 4650 3450
-Wire Wire Line
- 4450 3550 4650 3550
-Text Label 4850 1150 0 50 ~ 0
-A0
-Text Label 4850 1250 0 50 ~ 0
-A1
-Text Label 4850 1350 0 50 ~ 0
-A2
-Text Label 4850 1450 0 50 ~ 0
-A3
-Text Label 4850 1550 0 50 ~ 0
-A4
-Text Label 4850 1650 0 50 ~ 0
-A5
-Text Label 4850 1750 0 50 ~ 0
-A6
-Text Label 4850 1850 0 50 ~ 0
-A7
-Text Label 4850 1950 0 50 ~ 0
-A8
-Text Label 4850 2050 0 50 ~ 0
-A9
-Text Label 4850 2150 0 50 ~ 0
-A10
-Text Label 4850 2250 0 50 ~ 0
-A11
-Text Label 4850 2350 0 50 ~ 0
-A12
-Text Label 4850 2450 0 50 ~ 0
-A13
-Text Label 4850 2550 0 50 ~ 0
-A14
-Text Label 4850 2650 0 50 ~ 0
-A15
-Wire Wire Line
- 4850 1150 5000 1150
-Wire Wire Line
- 4850 1250 5000 1250
-Wire Wire Line
- 4850 1350 5000 1350
-Wire Wire Line
- 4850 1450 5000 1450
-Wire Wire Line
- 4850 1550 5000 1550
-Wire Wire Line
- 4850 1650 5000 1650
-Wire Wire Line
- 4850 1750 5000 1750
-Wire Wire Line
- 4850 1850 5000 1850
-Wire Wire Line
- 4850 1950 5000 1950
-Wire Wire Line
- 4850 2050 5000 2050
-Wire Wire Line
- 4850 2150 5000 2150
-Wire Wire Line
- 4850 2250 5000 2250
-Wire Wire Line
- 4850 2350 5000 2350
-Wire Wire Line
- 4850 2450 5000 2450
-Wire Wire Line
- 4850 2550 5000 2550
-Wire Wire Line
- 4850 2650 5000 2650
-Entry Wire Line
- 4750 2750 4850 2650
-Entry Wire Line
- 4750 2650 4850 2550
-Entry Wire Line
- 4750 2550 4850 2450
-Entry Wire Line
- 4750 2450 4850 2350
-Entry Wire Line
- 4750 2350 4850 2250
-Entry Wire Line
- 4750 2250 4850 2150
-Entry Wire Line
- 4750 2150 4850 2050
-Entry Wire Line
- 4750 2050 4850 1950
-Entry Wire Line
- 4750 1950 4850 1850
-Entry Wire Line
- 4750 1850 4850 1750
-Entry Wire Line
- 4750 1750 4850 1650
-Entry Wire Line
- 4750 1650 4850 1550
-Entry Wire Line
- 4750 1550 4850 1450
-Entry Wire Line
- 4750 1450 4850 1350
-Entry Wire Line
- 4750 1350 4850 1250
-Entry Wire Line
- 4750 1250 4850 1150
-Entry Wire Line
- 4650 1150 4750 1250
-Entry Wire Line
- 4650 1250 4750 1350
-Entry Wire Line
- 4650 1350 4750 1450
-Entry Wire Line
- 4650 1450 4750 1550
-Entry Wire Line
- 4650 1550 4750 1650
-Entry Wire Line
- 4650 1650 4750 1750
-Entry Wire Line
- 4650 1750 4750 1850
-Entry Wire Line
- 4650 1850 4750 1950
-Wire Wire Line
- 3450 2250 3450 3050
-Wire Wire Line
- 3500 1950 3500 3350
-Wire Wire Line
- 3450 1350 3450 2250
-Entry Wire Line
- 4650 2850 4750 2950
-Entry Wire Line
- 4650 2950 4750 3050
-Entry Wire Line
- 4650 3050 4750 3150
-Entry Wire Line
- 4650 3150 4750 3250
-Entry Wire Line
- 4650 3250 4750 3350
-Entry Wire Line
- 4650 3350 4750 3450
-Entry Wire Line
- 4650 3450 4750 3550
-Entry Wire Line
- 4650 3550 4750 3650
-$Comp
-L power:VCC #PWR022
-U 1 1 5F1C25DD
-P 5800 3550
-F 0 "#PWR022" H 5800 3400 50 0001 C CNN
-F 1 "VCC" H 5800 3700 50 0000 C CNN
-F 2 "" H 5800 3550 50 0001 C CNN
-F 3 "" H 5800 3550 50 0001 C CNN
- 1 5800 3550
- -1 0 0 -1
-$EndComp
-$Comp
-L power:GND #PWR023
-U 1 1 5F1C2BC3
-P 5800 5150
-F 0 "#PWR023" H 5800 4900 50 0001 C CNN
-F 1 "GND" H 5800 5000 50 0000 C CNN
-F 2 "" H 5800 5150 50 0001 C CNN
-F 3 "" H 5800 5150 50 0001 C CNN
- 1 5800 5150
- -1 0 0 -1
-$EndComp
-$Comp
-L power:GND #PWR019
-U 1 1 5F1C61CE
-P 5550 3450
-F 0 "#PWR019" H 5550 3200 50 0001 C CNN
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-Text Label 4900 3000 0 50 ~ 0
-~WR
-Text Label 4800 2900 0 50 ~ 0
-~RAMOE
-Wire Wire Line
- 5000 3100 4800 3100
-Text Label 4800 3100 0 50 ~ 0
-~RAMCS
-$Comp
-L power:VCC #PWR017
-U 1 1 60708BFD
-P 4900 3300
-F 0 "#PWR017" H 4900 3150 50 0001 C CNN
-F 1 "VCC" H 4900 3450 50 0000 C CNN
-F 2 "" H 4900 3300 50 0001 C CNN
-F 3 "" H 4900 3300 50 0001 C CNN
- 1 4900 3300
- -1 0 0 -1
-$EndComp
-Wire Wire Line
- 4900 3300 5000 3300
-Wire Wire Line
- 5000 3300 5000 3200
-Connection ~ 5550 6850
-Wire Wire Line
- 4400 5950 4650 5950
-Text Label 4400 5950 0 50 ~ 0
-~RAMOE
-Wire Wire Line
- 4400 6250 4650 6250
-Text Label 4400 6250 0 50 ~ 0
-~RAMCS
-NoConn ~ 4400 6550
-NoConn ~ 4400 6850
-$Comp
-L power:GND #PWR010
-U 1 1 607F5969
-P 3200 6550
-F 0 "#PWR010" H 3200 6300 50 0001 C CNN
-F 1 "GND" H 3200 6400 50 0000 C CNN
-F 2 "" H 3200 6550 50 0001 C CNN
-F 3 "" H 3200 6550 50 0001 C CNN
- 1 3200 6550
- -1 0 0 -1
-$EndComp
-Wire Wire Line
- 3400 6550 3400 6650
-Connection ~ 3400 6650
-Wire Wire Line
- 3400 6650 3400 6850
-Connection ~ 3400 6850
-Wire Wire Line
- 3400 6850 3400 6950
-Wire Wire Line
- 3200 6550 3400 6550
-Connection ~ 3400 6550
-Wire Wire Line
- 3400 7250 3400 7550
-Wire Wire Line
- 3400 7550 3900 7550
-Connection ~ 3900 7550
-$Comp
-L Device:C C5
-U 1 1 608712E4
-P 7000 950
-F 0 "C5" H 6950 1150 50 0000 L CNN
-F 1 "0.1uF" H 6900 750 50 0000 L CNN
-F 2 "Capacitor_SMD:C_0805_2012Metric_Pad1.15x1.40mm_HandSolder" H 7038 800 50 0001 C CNN
-F 3 "~" H 7000 950 50 0001 C CNN
- 1 7000 950
- 1 0 0 -1
-$EndComp
-$Comp
-L Device:C C6
-U 1 1 6087551A
-P 7250 950
-F 0 "C6" H 7200 1150 50 0000 L CNN
-F 1 "0.1uF" H 7150 750 50 0000 L CNN
-F 2 "Capacitor_SMD:C_0805_2012Metric_Pad1.15x1.40mm_HandSolder" H 7288 800 50 0001 C CNN
-F 3 "~" H 7250 950 50 0001 C CNN
- 1 7250 950
- 1 0 0 -1
-$EndComp
-$Comp
-L Device:C C7
-U 1 1 608757E2
-P 7500 950
-F 0 "C7" H 7450 1150 50 0000 L CNN
-F 1 "0.1uF" H 7400 750 50 0000 L CNN
-F 2 "Capacitor_SMD:C_0805_2012Metric_Pad1.15x1.40mm_HandSolder" H 7538 800 50 0001 C CNN
-F 3 "~" H 7500 950 50 0001 C CNN
- 1 7500 950
- 1 0 0 -1
-$EndComp
-$Comp
-L Device:C C8
-U 1 1 6087734E
-P 7750 950
-F 0 "C8" H 7700 1150 50 0000 L CNN
-F 1 "0.1uF" H 7650 750 50 0000 L CNN
-F 2 "Capacitor_SMD:C_0805_2012Metric_Pad1.15x1.40mm_HandSolder" H 7788 800 50 0001 C CNN
-F 3 "~" H 7750 950 50 0001 C CNN
- 1 7750 950
- 1 0 0 -1
-$EndComp
-$Comp
-L Device:C C9
-U 1 1 608775E5
-P 8000 950
-F 0 "C9" H 7950 1150 50 0000 L CNN
-F 1 "0.1uF" H 7900 750 50 0000 L CNN
-F 2 "Capacitor_SMD:C_0805_2012Metric_Pad1.15x1.40mm_HandSolder" H 8038 800 50 0001 C CNN
-F 3 "~" H 8000 950 50 0001 C CNN
- 1 8000 950
- 1 0 0 -1
-$EndComp
-$Comp
-L Device:C C10
-U 1 1 60877E21
-P 8250 950
-F 0 "C10" H 8200 1150 50 0000 L CNN
-F 1 "0.1uF" H 8150 750 50 0000 L CNN
-F 2 "Capacitor_SMD:C_0805_2012Metric_Pad1.15x1.40mm_HandSolder" H 8288 800 50 0001 C CNN
-F 3 "~" H 8250 950 50 0001 C CNN
- 1 8250 950
- 1 0 0 -1
-$EndComp
-$Comp
-L Device:C C11
-U 1 1 6087803A
-P 8500 950
-F 0 "C11" H 8450 1150 50 0000 L CNN
-F 1 "0.1uF" H 8400 750 50 0000 L CNN
-F 2 "Capacitor_SMD:C_0805_2012Metric_Pad1.15x1.40mm_HandSolder" H 8538 800 50 0001 C CNN
-F 3 "~" H 8500 950 50 0001 C CNN
- 1 8500 950
- 1 0 0 -1
-$EndComp
-$Comp
-L Device:C C12
-U 1 1 60878368
-P 8750 950
-F 0 "C12" H 8700 1150 50 0000 L CNN
-F 1 "0.1uF" H 8650 750 50 0000 L CNN
-F 2 "Capacitor_SMD:C_0805_2012Metric_Pad1.15x1.40mm_HandSolder" H 8788 800 50 0001 C CNN
-F 3 "~" H 8750 950 50 0001 C CNN
- 1 8750 950
- 1 0 0 -1
-$EndComp
-$Comp
-L Device:C C13
-U 1 1 60893FC1
-P 9000 950
-F 0 "C13" H 8950 1150 50 0000 L CNN
-F 1 "0.1uF" H 8900 750 50 0000 L CNN
-F 2 "Capacitor_SMD:C_0805_2012Metric_Pad1.15x1.40mm_HandSolder" H 9038 800 50 0001 C CNN
-F 3 "~" H 9000 950 50 0001 C CNN
- 1 9000 950
- 1 0 0 -1
-$EndComp
-$Comp
-L power:GND #PWR025
-U 1 1 60895593
-P 6850 1100
-F 0 "#PWR025" H 6850 850 50 0001 C CNN
-F 1 "GND" H 6850 950 50 0000 C CNN
-F 2 "" H 6850 1100 50 0001 C CNN
-F 3 "" H 6850 1100 50 0001 C CNN
- 1 6850 1100
- -1 0 0 -1
-$EndComp
-$Comp
-L power:VCC #PWR024
-U 1 1 6089701F
-P 6850 800
-F 0 "#PWR024" H 6850 650 50 0001 C CNN
-F 1 "VCC" H 6850 950 50 0000 C CNN
-F 2 "" H 6850 800 50 0001 C CNN
-F 3 "" H 6850 800 50 0001 C CNN
- 1 6850 800
- -1 0 0 -1
-$EndComp
-Wire Wire Line
- 6850 800 7000 800
-Connection ~ 7000 800
-Wire Wire Line
- 7000 800 7250 800
-Connection ~ 7250 800
-Wire Wire Line
- 7250 800 7500 800
-Connection ~ 7500 800
-Wire Wire Line
- 7500 800 7750 800
-Connection ~ 7750 800
-Wire Wire Line
- 7750 800 8000 800
-Connection ~ 8000 800
-Wire Wire Line
- 8000 800 8250 800
-Connection ~ 8250 800
-Wire Wire Line
- 8250 800 8500 800
-Connection ~ 8500 800
-Wire Wire Line
- 8500 800 8750 800
-Connection ~ 8750 800
-Wire Wire Line
- 8750 800 9000 800
-Wire Wire Line
- 6850 1100 7000 1100
-Connection ~ 7000 1100
-Wire Wire Line
- 7000 1100 7250 1100
-Connection ~ 7250 1100
-Wire Wire Line
- 7250 1100 7500 1100
-Connection ~ 7500 1100
-Wire Wire Line
- 7500 1100 7750 1100
-Connection ~ 7750 1100
-Wire Wire Line
- 7750 1100 8000 1100
-Connection ~ 8000 1100
-Wire Wire Line
- 8000 1100 8250 1100
-Connection ~ 8250 1100
-Wire Wire Line
- 8250 1100 8500 1100
-Connection ~ 8500 1100
-Wire Wire Line
- 8500 1100 8750 1100
-Connection ~ 8750 1100
-Wire Wire Line
- 8750 1100 9000 1100
-Text Notes 7750 650 0 50 ~ 0
-bypass capacitors
-NoConn ~ 1900 5300
-Text Label 2800 3050 0 50 ~ 0
-~SYSRST
-$Comp
-L Connector:Conn_01x01_Male J7
-U 1 1 60C37FAA
-P 3150 2750
-F 0 "J7" V 3100 2700 50 0000 L CNN
-F 1 "SYSRST" H 3150 2800 50 0000 L CNN
-F 2 "Connector_PinSocket_2.54mm:PinSocket_1x01_P2.54mm_Vertical" H 3150 2750 50 0001 C CNN
-F 3 "~" H 3150 2750 50 0001 C CNN
- 1 3150 2750
- 0 1 1 0
-$EndComp
-Wire Wire Line
- 3150 3050 3150 2950
-Wire Wire Line
- 2800 3050 3150 3050
-$Comp
-L Device:R R3
-U 1 1 60D2872F
-P 7200 5000
-F 0 "R3" V 7200 4750 50 0000 C CNN
-F 1 "4K7" V 7200 5000 50 0000 C CNN
-F 2 "Resistor_SMD:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder" V 7130 5000 50 0001 C CNN
-F 3 "~" H 7200 5000 50 0001 C CNN
- 1 7200 5000
- 0 -1 1 0
-$EndComp
-Wire Wire Line
- 6250 6450 6050 6450
-Wire Wire Line
- 6050 6250 6400 6250
-Wire Wire Line
- 6400 6250 6400 6850
-Entry Wire Line
- 6650 4900 6750 5000
-Entry Wire Line
- 6650 5000 6750 5100
-Entry Wire Line
- 6650 5100 6750 5200
-Entry Wire Line
- 6650 5200 6750 5300
-Wire Wire Line
- 6750 5000 7050 5000
-Wire Wire Line
- 6750 5100 7050 5100
-Wire Wire Line
- 6750 5200 7050 5200
-Wire Wire Line
- 6750 5300 7050 5300
-Text Label 6750 5000 0 50 ~ 0
-SYSA11
-Text Label 6750 5100 0 50 ~ 0
-SYSA12
-Text Label 6750 5200 0 50 ~ 0
-SYSA13
-Text Label 6750 5300 0 50 ~ 0
-SYSA14
-$Comp
-L Device:R R4
-U 1 1 60E87D8E
-P 7200 5100
-F 0 "R4" V 7200 4850 50 0000 C CNN
-F 1 "4K7" V 7200 5100 50 0000 C CNN
-F 2 "Resistor_SMD:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder" V 7130 5100 50 0001 C CNN
-F 3 "~" H 7200 5100 50 0001 C CNN
- 1 7200 5100
- 0 -1 1 0
-$EndComp
-$Comp
-L Device:R R5
-U 1 1 60E87FB4
-P 7200 5200
-F 0 "R5" V 7200 4950 50 0000 C CNN
-F 1 "4K7" V 7200 5200 50 0000 C CNN
-F 2 "Resistor_SMD:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder" V 7130 5200 50 0001 C CNN
-F 3 "~" H 7200 5200 50 0001 C CNN
- 1 7200 5200
- 0 -1 1 0
-$EndComp
-$Comp
-L Device:R R6
-U 1 1 60E8815F
-P 7200 5300
-F 0 "R6" V 7200 5050 50 0000 C CNN
-F 1 "4K7" V 7200 5300 50 0000 C CNN
-F 2 "Resistor_SMD:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder" V 7130 5300 50 0001 C CNN
-F 3 "~" H 7200 5300 50 0001 C CNN
- 1 7200 5300
- 0 -1 1 0
-$EndComp
-$Comp
-L power:GND #PWR031
-U 1 1 60E8A6A5
-P 7350 5350
-F 0 "#PWR031" H 7350 5100 50 0001 C CNN
-F 1 "GND" H 7350 5200 50 0000 C CNN
-F 2 "" H 7350 5350 50 0001 C CNN
-F 3 "" H 7350 5350 50 0001 C CNN
- 1 7350 5350
- -1 0 0 -1
-$EndComp
-Wire Wire Line
- 7350 5350 7350 5300
-Connection ~ 7350 5100
-Wire Wire Line
- 7350 5100 7350 5000
-Connection ~ 7350 5200
-Wire Wire Line
- 7350 5200 7350 5100
-Connection ~ 7350 5300
-Wire Wire Line
- 7350 5300 7350 5200
-NoConn ~ 2800 2950
-Connection ~ 3500 3350
-Wire Wire Line
- 3500 3450 3500 3350
-Wire Wire Line
- 3650 3450 3500 3450
-Wire Wire Line
- 3500 1750 3500 1950
-Wire Wire Line
- 3500 1650 3500 1750
-Connection ~ 3500 1750
-Wire Wire Line
- 3650 1750 3500 1750
-Text Notes 1250 1200 0 50 ~ 0
-Note: firmware drives ~SS~ high when not in\nprogramming mode (PGM low) to avoid contention\nwhen the system drives the address bus.
-$Comp
-L Device:R R7
-U 1 1 60FC7770
-P 3350 2950
-F 0 "R7" H 3400 3100 50 0000 C CNN
-F 1 "4K7" V 3350 2950 50 0000 C CNN
-F 2 "Resistor_SMD:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder" V 3280 2950 50 0001 C CNN
-F 3 "~" H 3350 2950 50 0001 C CNN
- 1 3350 2950
- 1 0 0 1
-$EndComp
-Wire Wire Line
- 3350 3150 3350 3100
-Wire Wire Line
- 2800 3150 3350 3150
-$Comp
-L power:VCC #PWR032
-U 1 1 60FE6889
-P 3350 2800
-F 0 "#PWR032" H 3350 2650 50 0001 C CNN
-F 1 "VCC" H 3350 2950 50 0000 C CNN
-F 2 "" H 3350 2800 50 0001 C CNN
-F 3 "" H 3350 2800 50 0001 C CNN
- 1 3350 2800
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 3300 3550 2800 3550
-Wire Wire Line
- 3350 3450 2800 3450
-Wire Wire Line
- 3350 3450 3350 5200
-Wire Wire Line
- 5550 6850 6400 6850
-Wire Wire Line
- 6300 4850 6300 4750
-Connection ~ 6300 4750
-Wire Wire Line
- 6050 6550 6050 6450
-Connection ~ 6050 6450
-Wire Wire Line
- 6700 3050 6700 2950
-$Comp
-L Diode:1N4148 D3
-U 1 1 5F8C7D7E
-P 6250 3300
-F 0 "D3" V 6350 3150 50 0000 L CNN
-F 1 "1N4148" H 6000 3200 50 0000 L CNN
-F 2 "Diode_SMD:D_0805_2012Metric_Pad1.15x1.40mm_HandSolder" H 6250 3125 50 0001 C CNN
-F 3 "https://assets.nexperia.com/documents/data-sheet/1N4148_1N4448.pdf" H 6250 3300 50 0001 C CNN
- 1 6250 3300
- 0 1 1 0
-$EndComp
-$Comp
-L Diode:1N4148 D4
-U 1 1 5F89552F
-P 6450 3300
-F 0 "D4" V 6550 3300 50 0000 L CNN
-F 1 "1N4148" H 6200 3200 50 0000 L CNN
-F 2 "Diode_SMD:D_0805_2012Metric_Pad1.15x1.40mm_HandSolder" H 6450 3125 50 0001 C CNN
-F 3 "https://assets.nexperia.com/documents/data-sheet/1N4148_1N4448.pdf" H 6450 3300 50 0001 C CNN
- 1 6450 3300
- 0 1 1 0
-$EndComp
-Connection ~ 6700 3050
-Text Label 6550 3550 0 50 ~ 0
-~SYSCS
-Text Label 6550 3650 0 50 ~ 0
-~SYSOE
-Wire Wire Line
- 6800 3550 6450 3550
-Wire Wire Line
- 6450 3550 6450 3450
-Wire Wire Line
- 6800 3650 6250 3650
-Wire Wire Line
- 6250 3650 6250 3450
-Wire Wire Line
- 6250 3150 6250 3050
-Wire Wire Line
- 6250 3050 6450 3050
-Wire Wire Line
- 6450 3150 6450 3050
-Connection ~ 6450 3050
-Wire Wire Line
- 6450 3050 6700 3050
-Wire Wire Line
- 6700 3350 6700 3050
-$Comp
-L Device:R R8
-U 1 1 5FB4A123
-P 6950 3350
-F 0 "R8" V 7050 3350 50 0000 C CNN
-F 1 "4K7" V 6950 3350 50 0000 C CNN
-F 2 "Resistor_SMD:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder" V 6880 3350 50 0001 C CNN
-F 3 "~" H 6950 3350 50 0001 C CNN
- 1 6950 3350
- 0 -1 1 0
-$EndComp
-Wire Wire Line
- 6800 3350 6700 3350
-Wire Wire Line
- 7100 3350 7200 3350
-Wire Bus Line
- 8100 1500 8100 2650
-Wire Bus Line
- 3250 650 3250 4250
-Wire Bus Line
- 6400 650 6400 2650
-Wire Bus Line
- 10350 1500 10350 4900
-Wire Bus Line
- 6650 3950 6650 6450
-Wire Bus Line
- 8650 2100 8650 6450
-Wire Bus Line
- 4750 1250 4750 6150
-Connection ~ 7200 3350
-$EndSCHEMATC
projects / romdev / blobdiff