HardLabs

ReBridgette

jbilander·ReBridgette·KiCad/ReBridgette.kicad_pcb

ReBridgette PCB layout, top view — open source FPGA board by jbilander

About the ReBridgette PCB

ReBridgette is an open source FPGA PCB design by jbilander, published on GitHub under the GPL-3.0 license. It is a 3-layer board measuring 23.3 × 16.8 mm, with 23 components from 13 distinct parts.

Its main chip is the ICE40HX1K-CB132, from the FPGA family. Other key parts include the MX25V1635FZUI, TLV74312PDBV, TLV75533PDBVR and ReBridgette_QFN. By type, the board carries 15 capacitors, 5 ICs, 2 resistors and 1 diode.

It belongs with the retro computing designs in this gallery.

From the project

A re-implementation of the Amiga Bridgette chip.

Replacement for Commodore A4000 Bridgette chip using Lattice ICE40 FPGA.

This project implements the Amiga Bridgette chip functionality using a Lattice ICE40HX1K FPGA in a CB132 (132-ball caBGA) package. The Bridgette chip manages bus bridging and buffering between the Amiga's processor and chip buses. ***

After cloning the ReBridgette repository, run the setup script to create the required skeleton directories:

ReBridgette, from the project README
From the project README

Main components on the ReBridgette

ICE40HX1K-CB132MX25V1635FZUITLV74312PDBVTLV75533PDBVRReBridgette_QFN

ReBridgette bill of materials (BOM)

23 components, 13 distinct parts.

QtyPartRefs
1
ICE40HX1K-CB132
U1
1
MX25V1635FZUI
U2
1
TLV74312PDBV
U3
1
TLV75533PDBVR
U4
1
ReBridgette_QFN
U5
1
CDBU0520 (Schottky)
D1
1
10uF
C1
4
1uF
C2, C3, C4, C5
4
100nF
C6, C7, C8, C11
2
100nF
C9, C10
3
10nF
C12, C13, C14
1
100nF
C15
2
10k
R1, R2

ReBridgette design files

The KiCad project lives in the jbilander/ReBridgette repository on GitHub; these links point at the commit this page was built from.

ReBridgette: common questions

What microcontroller does the ReBridgette use?

The ReBridgette is built around the ICE40HX1K-CB132, from the FPGA family.

How big is the ReBridgette PCB?

The ReBridgette measures 23.3 × 16.8 mm, has 3 copper layers and is 1.6 mm thick.

How many components are on the ReBridgette?

23 components, from 13 distinct parts. The full bill of materials is listed on this page.

Where can I download the ReBridgette design files?

From the jbilander/ReBridgette repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the ReBridgette design in my own project?

Yes, under the terms of its GPL-3.0 license, which jbilander chose for the repository.

Can I test firmware for the ReBridgette without the hardware?

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

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