6809 CPU
About the 6809 CPU PCB
6809 CPU is an open source PCB design by roberto314, published on GitHub under the BSD-2-Clause license. It is a 2-layer board measuring 100 × 100 mm, with 39 components from 12 distinct parts.
Other key parts include the XC9572VQ44, SN74LVC245ANSR, SN74LVCC3245ANSR, SN74LVC125AD and MC6809E. By type, the board carries 15 resistors, 9 capacitors, 8 ICs, 4 connectors and 3 diodes.
It belongs with the retro computing and usb & debug tools designs in this gallery.
From the project
A modular 8-bit Computer able to recreate (nearly) every Retro computer of the late 70s to mid 80s.
A modular 8-bit Computer able to recreate (nearly) every microcomputer of the mid 70s to early 80s in Hardware without FPGAs (although an FPGA can be added). Can also be used as a teaching tool for:
VHDL or Verilog C RTOS (STM32F401 runs ChibiOS. Link: https://www.chibios.org) Python bash and linux in general (Olimex board runs linux with fbterm and tmux) Harwaredesign Timing of CPUs maybe Assembler SPI and I2C Interfaces CPLDs and FPGAs
Main components on the 6809 CPU
6809 CPU bill of materials (BOM)
39 components, 12 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | XC9572VQ44 | TQFP-44_10x10mm_P0.8mm | U1 |
| 3 | SN74LVC245ANSR | SO-20_5.3x12.6mm_P1.27mm | U2, U3, U21 |
| 1 | SN74LVCC3245ANSR | SO-24_5.3x15mm_P1.27mm | U5 |
| 2 | SN74LVC125AD | SOIC-14_3.9x8.7mm_P1.27mm | U8, U9 |
| 1 | MC6809E | DIP-40_W15.24mm_LongPads | U22 |
| 2 | BUS | PinSocket_2x20_P2.54mm_Vertical | J1, J2 |
| 1 | JTAG | PinHeader_2x05_P2.54mm_Horizontal | J34 |
| 1 | Outside | PinHeader_2x06_P2.54mm_Horizontal | J37 |
| 3 | BAV70T | SOT-23_Handsoldering | D8, D9, D10 |
| 9 | 100n | C_1206_3216Metric | C1, C2, C3, C4, C5, C6, C7, C8 +1 |
| 5 | 10k | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R1, R2, R9, R10, R11 |
| 10 | 1k | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R8, R13, R14, R15, R16, R20, R21, R22 +2 |
6809 CPU design files
The KiCad project lives in the roberto314/Unicomp3 repository on GitHub; these links point at the commit this page was built from.
6809 CPU: common questions
How big is the 6809 CPU PCB?
The 6809 CPU measures 100 × 100 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the 6809 CPU?
39 components, from 12 distinct parts. The full bill of materials is listed on this page.
Where can I download the 6809 CPU design files?
From the roberto314/Unicomp3 repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the 6809 CPU design in my own project?
Yes, under the terms of its BSD-2-Clause license, which roberto314 chose for the repository.
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