OpenCAPI to PCIe x8
About the OpenCAPI to PCIe x8 PCB
OpenCAPI to PCIe x8 is an open source PCB design by mwrnd, published on GitHub under the BSD-3-Clause license. It is a 4-layer board measuring 51.3 × 40.4 mm, with 7 components from 7 distinct parts.
By type, the board carries 4 test points, 2 connectors and 1 resistor.
From the project
PCIe x16-to-x8x8 Debifurcator
Work-In-Progress: First revision Gerbers not yet manufactured or tested. These notes need updating.
Designed for use with the Alveo U25 in systems that do not support PCIe Bifurcation. The Alveo U25 has an x16 PCIe interface that is bifurcated to two x8 interfaces, one for the SFC9250 X2 GbE Controller and the other for the XCZU19EG FPGA.
Check out the simpler PCIex16-to-x8Debifurcator if you only need to connect to the FPGA.
OpenCAPI to PCIe x8 bill of materials (BOM)
7 components, 7 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | SFF8654_IO | SlimSAS_8x_RA_U10-A474 | J1 |
| 1 | Bus_PCI_Express_x8 | BUS_PCIexpress_x8 | J3 |
| 1 | nPRSNT1 | TestPoint_THTPad_D1.0mm_Drill0.5mm | TP1 |
| 1 | nPRSNT2_x1 | TestPoint_THTPad_D1.0mm_Drill0.5mm | TP2 |
| 1 | nPRSNT2_x4 | TestPoint_THTPad_D1.0mm_Drill0.5mm | TP3 |
| 1 | nPRSNT2_x8 | TestPoint_THTPad_D1.0mm_Drill0.5mm | TP5 |
| 1 | x8 | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R1 |
OpenCAPI to PCIe x8 design files
The KiCad project lives in the mwrnd/PCIe_x16-to-x8x8_Debifurcator repository on GitHub; these links point at the commit this page was built from.
OpenCAPI to PCIe x8: common questions
How big is the OpenCAPI to PCIe x8 PCB?
The OpenCAPI to PCIe x8 measures 51.3 × 40.4 mm, has 4 copper layers and is 1.6062 mm thick.
How many components are on the OpenCAPI to PCIe x8?
7 components, from 7 distinct parts. The full bill of materials is listed on this page.
Where can I download the OpenCAPI to PCIe x8 design files?
From the mwrnd/PCIe_x16-to-x8x8_Debifurcator repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the OpenCAPI to PCIe x8 design in my own project?
Yes, under the terms of its BSD-3-Clause license, which mwrnd chose for the repository.
