HardLabs

ReDIP-CIA

daglem·reDIP-CIA·hardware/reDIP-CIA.kicad_pcb

ReDIP-CIA PCB layout, top view — open source FPGA board by daglem
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About the ReDIP-CIA PCB

ReDIP-CIA is an open source FPGA PCB design by daglem, published on GitHub under the CERN-OHL-S-2.0 license. It is a 4-layer board measuring 17.8 × 50.8 mm, with 43 components from 16 distinct parts.

Its main chip is the ICE5LP1K-SG48ITR, from the FPGA family. Other key parts include the NCP115AMX120TCG, NCP115AMX330TCG, SN74CBT16210CDGGR, 74AHCT1G14SE-7 and AT25EU0011A-SSHN-T. By type, the board carries 21 resistors, 12 capacitors, 7 ICs, 2 connectors and 1 diode.

It belongs with the retro computing designs in this gallery.

From the project

MOS 6520 PIA / MOS 6522 VIA / MOS 6526/8520/8521 CIA replacement

Lattice iCE5LP1K FPGA 1Mbit FLASH * 5V tolerant I/O

The reDIP CIA provides an open source hardware platform for MOS 6520 PIA / MOS 6522 VIA / MOS 6526/8520/8521 CIA replacements.

Designs for the iCE5LP1K FPGA can be processed by yosys and nextpnr.

5V input 35 FPGA GPIO 3 FPGA open-drain I/O GND

All FPGA header I/O is 5V tolerant, and can drive 5V TTL.

A separate header footprint is provided for (Q)SPI flash programming, with pinout borrowed from the iCEBreaker Bitsy.

ReDIP-CIA, from the project README
From the project README

Main components on the ReDIP-CIA

NCP115AMX120TCGNCP115AMX330TCGSN74CBT16210CDGGR74AHCT1G14SE-7ICE5LP1K-SG48ITRAT25EU0011A-SSHN-T

ReDIP-CIA bill of materials (BOM)

43 components, 16 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
NCP115AMX120TCG
U1
1
NCP115AMX330TCG
U2
2
SN74CBT16210CDGGR
U3, U4
1
74AHCT1G14SE-7
74AHCT1G14
U5
1
ICE5LP1K-SG48ITR
ICE5LP1K-SG48
U6
1
AT25EU0011A-SSHN-T
AT25EU0011A-SSHN
U7
2
X5511WV-20-C35D35-1000
Conn_01x20
J1, J2
1
BAS16W-7-F
BAS16W
D1
2
GRM155C81C225KE11D
1uF
C1, C3
2
GRM033C80J105ME05D
1uF
C2, C11
1
GRM035R61A225ME01D
1uF
C4
7
GRM033R60J224ME90D
0.1uF
C5, C6, C7, C8, C9, C10, C12
16
ERJ1GNJ472C
4.7k
R1, R2, R3, R4, R5, R6, R7, R8 +8
2
ERJ1GNF2871C
2.87k
R17, R21
1
ERJ1GNJ101C
100
R18
2
ERJ1GNJ103C
10k
R19, R20

ReDIP-CIA design files

The KiCad project lives in the daglem/reDIP-CIA repository on GitHub; these links point at the commit this page was built from.

ReDIP-CIA: common questions

What microcontroller does the ReDIP-CIA use?

The ReDIP-CIA is built around the ICE5LP1K-SG48ITR, from the FPGA family.

How big is the ReDIP-CIA PCB?

The ReDIP-CIA measures 17.8 × 50.8 mm, has 4 copper layers and is 1.6062 mm thick.

How many components are on the ReDIP-CIA?

43 components, from 16 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the ReDIP-CIA design files?

From the daglem/reDIP-CIA repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the ReDIP-CIA design in my own project?

Yes, under the terms of its CERN-OHL-S-2.0 license, which daglem chose for the repository.

Can I test firmware for the ReDIP-CIA 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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