HardLabs

Ice40-breakout

null-a·ice40-breakout-pcb

Ice40-breakout layout, top view — open source FPGA board by null-a

About the Ice40-breakout

Ice40-breakout is an open source FPGA PCB design by null-a, published on GitHub. It is a 2-layer board measuring 56 × 71.8 mm, with 55 components from 22 distinct parts.

Its main chip is the ICE40HX4K-TQ144, from the FPGA family. Other key parts include the SIT2001BI-S2-33E-12.000000G, TLV73333PDBV, TLV73312PDBV and AT25SF081-SHD-X. By type, the board carries 25 capacitors, 15 resistors, 6 connectors, 5 ICs, 3 diodes and 1 inductor.

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

From the project

A development board for the Lattice iCE40 FPGA

This KiCAD project contains the design of a break out / dev board for a Lattice iCE40 HX4K FPGA.

I'm a novice at PCB design, so please don't assume anything here represents good practice. I was motivated to tackle this after seeing Matt Venn's iCE40 board. Some elements of the design are based on the TinyFPGA BX.

SPI flash for configuration. On-board clock. Powered by 5v from a micro USB connector. Regulators for 3.3v and 1.2v. Power LED. Single output LED. 72 GPIO pins broken out. sysCONFIG pins broken out for programming the flash. Cold boot config pins broken out. The USB data lines are…

Main components on the Ice40-breakout

SIT2001BI-S2-33E-12.000000GTLV73333PDBVTLV73312PDBVAT25SF081-SHD-XICE40HX4K-TQ144

Ice40-breakout bill of materials (BOM)

55 components, 22 distinct parts.

QtyPartRefs
1
SIT2001BI-S2-33E-12.000000G
U1
1
TLV73333PDBV
U2
1
TLV73312PDBV
U3
1
AT25SF081-SHD-X
U4
1
ICE40HX4K-TQ144
U5
1
USB_B_Micro
J1
1
USB_Break_Out
J2
3
Conn_02x16_Odd_Even
J3, J4, J5
1
Conn_02x04_Odd_Even
J6
1
Short
D1
2
LED
D2, D3
1
30 ohm
FB1
3
10uF
C1, C7, C10
18
0.1uF
C2, C8, C9, C11, C12, C13, C14, C15 +10
4
1uF
C3, C4, C5, C6
2
100
R1, R5
1
1.5K
R2
2
68
R3, R4
3
0
R6, R10, R11
2
330
R7, R15
Show 2 more
QtyPartRefs
4
10K
R8, R9, R12, R13
1
NP
R14

Ice40-breakout design files

The KiCad project lives in the null-a/ice40-breakout-pcb repository on GitHub; these links point at the commit this page was built from.

Ice40-breakout: common questions

What microcontroller does the Ice40-breakout use?

The Ice40-breakout is built around the ICE40HX4K-TQ144, from the FPGA family.

How big is the Ice40-breakout?

The Ice40-breakout measures 56 × 71.8 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Ice40-breakout?

55 components, from 22 distinct parts. The full bill of materials is listed on this page.

Where can I download the Ice40-breakout design files?

From the null-a/ice40-breakout-pcb repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Ice40-breakout design in my own project?

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

Can I test firmware for the Ice40-breakout 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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