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CPU

jonathan-tooley·903·KiCad/CPU/CPU.kicad_pcb

CPU PCB layout, top view — open source Raspberry Pi board by jonathan-tooley

About the CPU PCB

CPU is an open source Raspberry Pi PCB design by jonathan-tooley, published on GitHub. It is a 2-layer board measuring 265.4 × 95.3 mm, with 32 components from 17 distinct parts.

Its main chip is the Raspberry_Pi_2_3, from the Raspberry Pi family. Other key parts include the TCA9548A, MCP23017 and MAX232. By type, the board carries 9 connectors, 9 capacitors, 9 resistors and 5 ICs.

Main components on the CPU

Raspberry_Pi_2_3TCA9548AMCP23017MAX232

CPU bill of materials (BOM)

32 components, 17 distinct parts.

QtyPartRefs
1
Raspberry_Pi_2_3
U1.1
1
TCA9548A
U1.2
2
MCP23017
U1.3, U1.5
1
MAX232
U1.4
1
Control Panel
P1.1
1
Display Unit
P1.2
1
Tape Punch
P1.3
1
Tape Reader
P1.4
1
CONN_01X02
P1.5
1
Plotter
P1.6
1
MISC GPIO
P1.7
1
IO Control
P1.8
1
RS232
P1.9
8
100n
C1, C2, C3, C4, C5, C6, C7, C9
1
10u
C8
8
4k7
R1, R2, R3, R4, R5, R6, R8, R9
1
20R
R7

CPU design files

The KiCad project lives in the jonathan-tooley/903 repository on GitHub; these links point at the commit this page was built from.

CPU: common questions

What microcontroller does the CPU use?

The CPU is built around the Raspberry_Pi_2_3, from the Raspberry Pi family.

How big is the CPU PCB?

The CPU measures 265.4 × 95.3 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the CPU?

32 components, from 17 distinct parts. The full bill of materials is listed on this page.

Where can I download the CPU design files?

From the jonathan-tooley/903 repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the CPU design in my own project?

The repository has no license, so all rights stay with jonathan-tooley. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the CPU without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug Raspberry Pi firmware against it before you order a PCB.

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