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Cpld cpu

jimmo·cpld-cpu·hardware/cpld-cpu.kicad_pcb

Cpld cpu PCB layout, top view — open source board by jimmo
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About the Cpld cpu PCB

Cpld cpu is an open source PCB design by jimmo, published on GitHub under the MIT license. It is a 4-layer board measuring 259.1 × 198.1 mm, with 435 components from 48 distinct parts.

Other key parts include the Acc, X, IR, Multiplexer and Decoder. By type, the board carries 209 resistors, 131 diodes, 53 capacitors, 16 connectors, 14 ICs and 12 switches.

It belongs with the dev boards & breakouts designs in this gallery.

From the project

A simple CPU implemented by discrete CPLD components.

This is a project to create a demonstration CPU that is simple enough to be able to watch its execution but also able to do something almost useful.

It was inspired by the following five projects: - Fourbit, by Jaromir Sukuba. This is a 4-bit CPU made entirely from 74xx series logic. - Tiny CPU in a CPLD, by Big Mess o' Wires. This implements a whole CPU inside a single Altera CPLD. - MCPU, by Tim Böscke (and writeup, by Jean-Claude Wippler). Similar to above, but using the exact CPLD that I was intending to use, and with a really well-documented and practical ISA. - The Megaprocessor, by…

Cpld cpu, from the project README
From the project README

Main components on the Cpld cpu

AccXIRMultiplexerDecoderARALURAM_IndexPC_LRAM_PagePC_HCY62138FV30LLGPIO_RNGClock

Cpld cpu bill of materials (BOM)

435 components, 48 distinct parts.

QtyPartRefs
1
Acc
U1
1
X
U2
1
IR
U3
1
Multiplexer
U4
1
Decoder
U5
1
AR
U6
1
ALU
U7
1
RAM_Index
U8
1
PC_L
U9
1
RAM_Page
U10
1
PC_H
U11
1
CY62138FV30LL
U12
1
GPIO_RNG
U13
1
Clock
U14
1
Acc
J1
1
X
J2
1
IR
J3
1
AXM
J4
1
Dec
J5
1
AR
J6
Show 28 more
QtyPartRefs
1
ALU
J7
1
Index
J8
1
PC_L
J9
1
Page
J10
1
PC_H
J11
1
Conn_02x14_Odd_Even
J12
1
GPIO
J13
1
Conn_02x17_Odd_Even
J14
1
Conn_01x07
J15
1
Clock
J16
1
BTN0
SW1
1
BTN1
SW2
1
BTN2
SW3
1
Halt
SW4
1
Reset
SW5
1
Step 1
SW6
1
S0
SW7
1
S2
SW8
1
S4
SW9
1
Step 8
SW10
1
S1
SW11
1
S3
SW12
131
LED_Small
D1, D2, D3, D4, D5, D6, D7, D8 +123
53
100n
C1, C2, C3, C4, C5, C6, C7, C8 +45
21
1.2k
R1, R2, R3, R4, R5, R6, R7, R8 +13
110
2k
R9, R10, R11, R12, R13, R14, R15, R16 +102
66
470
R50, R51, R52, R53, R54, R55, R56, R57 +58
12
10k
R189, R190, R191, R196, R197, R202, R203, R204 +4

Cpld cpu design files

The KiCad project lives in the jimmo/cpld-cpu repository on GitHub; these links point at the commit this page was built from.

Cpld cpu: common questions

How big is the Cpld cpu PCB?

The Cpld cpu measures 259.1 × 198.1 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Cpld cpu?

435 components, from 48 distinct parts. The full bill of materials is listed on this page.

Where can I download the Cpld cpu design files?

From the jimmo/cpld-cpu repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Cpld cpu design in my own project?

Yes, under the terms of its MIT license, which jimmo chose for the repository.

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