2 layers350 × 224.3 mm
2 layers156.2 × 100.3 mm
Microcompuer
DukkyCode/Microcomputer-DesignChip Specification: - XR68C681CJ-F – DUART: the XR68C681 devices offers a single IC solution for the 68000 family of microprocessors.
- Size
- 156.2 × 100.3 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 70
- Nets
- 172
- Pads
- 494
- Tracks, vias
- 2,815, 299
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 12 May 2023
- Updated
- 12 May 2023
Overview
Microcompuer is an open-source printed circuit board by DukkyCode, from the DukkyCode/Microcomputer-Design repository on GitHub. It is a 2-layer board of 156.2 × 100.3 mm with 70 parts on 172 nets, routed with 2,815 tracks and 299 vias.
It is built around the 74LS03P-E. Its parts include 21 capacitors, 17 resistors, 13 diodes, 2 connectors and 2 switches. It belongs with the interfaces and adapters boards and the FPGA and CPLD boards of this library.
Main components
1README
README.mdMicrocomputer Design
Introduction:
- The goal of this project is to design, build, and program a single-board computer. It also provides insight into computer architecture
Chip Specification:
- XR68C681CJ-F – DUART: the XR68C681 devices offers a single IC solution for the 68000 family of microprocessors.
- U62256ADK07LLG – RAM: Static RAM 32K x 8-Bit High Speed CMOS 150ns DIP -28
- AT28C256-15PU – ROM: Memory & Data Storage (EEPROM IC EEPROM 256k 50NS 28DIP)
- Max232E: IC Transceiver 2 channel 16DIP to interface with DUART
- LD1085V50 – Voltage Regulator: Step 9V down to 5V to provide power for the entire board
- JS202011SCQN – Power Switch: Switch to turn on & off power
- B3F-1022 – Reset Button: Simple power button to activate RESET on the buttons
- A-DS 09 A/KG-T2S – D-SUB connector: create serial communications with the desktop
- PJ-002B – Barrel Plug: Barrel Connector to connect with power adapter
- ECS-2200B-080: Create 8MHz clock signal for the CPLD & CPU
- ECS-2100AX-036: Create 3.6MHz clock signal for the DUART chips
- 22-28-4061: J-TAG connector to program the CPLD
Parts
70| Qty | Value | Footprint | References |
|---|---|---|---|
| 18 | 1uF Cap | Official KICAD Part List:CC0805KKX7R5BB105 | C1, C2, C3, C4, C5, C6, C10, C11, C12, C14, C16, C17, C18, C19, C20, C21 +2 |
| 13 | 330R | Official KICAD Part List:RC0805FR-07330RL | R5, R6, R7, R8, R9, R10, R11, R12, R13, R14, R15, R18, R19 |
| 13 | LED | Official KICAD Part List:LEDC2012X80N | D4, D5, D6, D7, D8, D9, D10, D11, D12, D13, D14, D16, D17 |
| 4 | 4.7KR | Official KICAD Part List:RC0805FR-074K7L | R1, R16, R20, R21 |
| 3 | 10uF Cap | Official KICAD Part List:CC0805KPX5R5BB106 | C8, C13, C15 |
| 1 | 74LS03 | Official KICAD Part List:SN74LS03N | U8 |
| 1 | Barrel Plug | Connector_BarrelJack:BarrelJack_CUI_PJ-102AH_Horizontal | PLUG1 |
| 1 | CPLD | Package_LCC:PLCC-84_THT-Socket | CPLD1 |
| 1 | CPU Clock | Official KICAD Part List:OSC_ECS-2200B-080 | CPU_CLK1 |
| 1 | Conn_01x10_Male | Connector_PinHeader_2.54mm:PinHeader_1x10_P2.54mm_Vertical | Con1 |
| 1 | D-SUB Connector | Connector_Dsub:DSUB-9_Male_Horizontal_P2.77x2.84mm_EdgePinOffset4.94mm_Housed_MountingHolesOffset7.48mm | J3 |
| 1 | DUART | Package_LCC:PLCC-44_THT-Socket | DUART1 |
| 1 | DUART Clock | Official KICAD Part List:OSC_ECS-2100AX-036 | D_CLK1 |
| 1 | JTAG Connector | Official KICAD Part List:22284061 | JTAG1 |
| 1 | LRAM | Package_DIP:DIP-28_W15.24mm_Socket | LRAM1 |
| 1 | LROM | Package_DIP:DIP-28_W15.24mm_Socket | LROM1 |
| 1 | MC68000FN | Package_LCC:PLCC-68_THT-Socket | CPU1 |
| 1 | PS | Official KICAD Part List:JS202011SCQN | SW1 |
| 1 | RS232 | Official KICAD Part List:MAX232ECN | RS1 |
| 1 | Reset Button | Official KICAD Part List:SW_B3F-1022 | S1 |
| 1 | Supervisor-Chip | Official KICAD Part List:21-0248A | DS1813 |
| 1 | URAM | Package_DIP:DIP-28_W15.24mm_Socket | URAM1 |
| 1 | UROM | Package_DIP:DIP-28_W15.24mm_Socket | UROM1 |
| 1 | Voltage Regulator | Official KICAD Part List:TO255P460X1020X2008-3P | REG1 |
Questions
How big is the Microcompuer PCB?
It measures 156.2 × 100.3 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Microcompuer use?
70 parts, built around the 74LS03P-E. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Microcompuer KiCad files?
From the DukkyCode/Microcomputer-Design repository on GitHub, at the commit this page was made from: the board is CAD/Microcompuer.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Microcompuer design in my own project?
Its repository states no licence, so its author keeps all rights: ask DukkyCode before reusing the design.
Similar boards
- 4 layers239.4 × 165.7 mm
- 2 layers99.1 × 99.1 mm
QL Qsound10x10
alvaroalea/QL_QsoundQprint_clone
A clone board of the Sound card for the Sinclair QL Computer.
23 parts11 - 2 layers62 × 72 mm
Msx joyblue v2-build2
herraa1/msx-joyblue-v2
Use bluetooth joysticks with your MSX computer
64 parts5GPL-3.0 - 4 layers244 × 244 mm
- 2 layers90 × 63 mm
- 2 layers74.2 × 54.2 mm
Msx joyduke v1
herraa1/msx-joyduke-v1
Use original Xbox joysticks with your MSX computer
54 parts1GPL-3.0 - 4 layers254 × 74 mm
