8-Bit CPU 32k
About the 8-Bit CPU 32k PCB
8-Bit CPU 32k is an open source PCB design by slu4coder, published on GitHub. It is a 2-layer board measuring 196.9 × 125.1 mm, with 101 components from 30 distinct parts.
Other key parts include the 74HC04, 74HC161, 74HC173, 74HC245 and 74HC86. By type, the board carries 47 ICs, 37 capacitors, 11 resistors, 3 connectors, 1 crystal and 1 switch.
It belongs with the dev boards & breakouts designs in this gallery.
From the project
Legacy: Version 1 and 2 of my TTL-only CPU featuring UART I/O, an expansion port, 512KB SSD at up to 10MHz clock speed
See tbd for the latest version 3. See https://github.com/slu4coder/Minimal-64x4-Home-Computer for a more feature-rich version.
This is a free and non-commercial project. I am in no way associated with any activies selling this as a product. Any such activity represents a license violation. Individual licenses apply for hardware and software parts. Please refer to appropriate documentations for detailed licensing information.
Main components on the 8-Bit CPU 32k
8-Bit CPU 32k bill of materials (BOM)
101 components, 30 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 74HC04 | DIP-14_W7.62mm | U1 |
| 12 | 74HC161 | DIP-16_W7.62mm | U2, U14, U20, U25, U26, U28, U29, U34 +4 |
| 6 | 74HC173 | DIP-16_W7.62mm | U3, U4, U31, U32, U37, U43 |
| 6 | 74HC245 | DIP-20_W7.62mm | U5, U12, U17, U27, U30, U33 |
| 2 | 74HC86 | DIP-14_W7.62mm | U6, U8 |
| 1 | 74HC02 | DIP-14_W7.62mm | U7 |
| 2 | 74HC08 | DIP-14_W7.62mm | U9, U42 |
| 2 | 74HC283 | DIP-16_W7.62mm | U10, U11 |
| 5 | 74HC00 | DIP-14_W7.62mm | U13, U19, U23, U24, U35 |
| 1 | 74HC193 | DIP-16_W7.62mm | U15 |
| 2 | 74HC164 | DIP-14_W7.62mm | U16, U18 |
| 2 | 74HC165 | DIP-16_W7.62mm | U21, U22 |
| 1 | SST39SF040A FLASH | DIP-32_W15.24mm_Socket | U38 |
| 1 | CY62256 RAM | DIP-28_W15.24mm | U40 |
| 1 | 74HC174 | DIP-16_W7.62mm | U44 |
| 1 | SST39SF010A MSB | DIP-32_W15.24mm_Socket | U45 |
| 1 | SST39SF010A LSB | DIP-32_W15.24mm_Socket | U47 |
| 1 | 3.6864MHz | Oscillator_DIP-14 | X1 |
| 1 | UART | PinSocket_1x06_P2.54mm_Vertical | J1 |
| 1 | CPU CLOCK | PinHeader_2x05_P2.54mm_Vertical | J2 |
Show 10 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | EXPANSION PORT | PinSocket_2x16_P2.54mm_Vertical | J3 |
| 1 | RESET | SW_PUSH_6mm | SW1 |
| 1 | 5V | LED_D3.0mm | D3 |
| 1 | 47µF | CP_Radial_D6.3mm_P2.50mm | C1 |
| 33 | 100nF | C_Disc_D5.0mm_W2.5mm_P2.50mm | C2, C3, C4, C5, C6, C7, C8, C9 +25 |
| 1 | 100p | C_Disc_D3.8mm_W2.6mm_P2.50mm | C26 |
| 2 | 470pF | C_Disc_D3.8mm_W2.6mm_P2.50mm | C27, C28 |
| 2 | 4.7k | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1, R10 |
| 8 | 470 | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R2, R3, R4, R5, R6, R7, R8, R9 |
| 1 | 1k | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R13 |
8-Bit CPU 32k design files
The KiCad project lives in the slu4coder/Minimal-UART-Computer-1-2 repository on GitHub; these links point at the commit this page was built from.
8-Bit CPU 32k: common questions
How big is the 8-Bit CPU 32k PCB?
The 8-Bit CPU 32k measures 196.9 × 125.1 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the 8-Bit CPU 32k?
101 components, from 30 distinct parts. The full bill of materials is listed on this page.
Where can I download the 8-Bit CPU 32k design files?
From the slu4coder/Minimal-UART-Computer-1-2 repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the 8-Bit CPU 32k design in my own project?
The repository has no license, so all rights stay with slu4coder. Use it as a reference, and ask the author before reusing the design.
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