6 layers10 × 10 mm
6 layers192.1 × 96 mm
Ac922interposer
OpenPOWERFoundation/ac922interposer3AC922 Interposer Board for DC-SCM BMC - mirrored from OPF git - Maintained by the LibreBMC SIG
- Size
- 192.1 × 96 mm
- Copper layers
- 6
- Thickness
- 1.6 mm
- Parts
- 15
- Nets
- 253
- Pads
- 443
- Tracks, vias
- 449, 43
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 4 Oct 2021
- Updated
- 10 Aug 2022
Overview
Ac922interposer is an open-source printed circuit board by OpenPOWERFoundation, from the OpenPOWERFoundation/ac922interposer repository on GitHub, published under the Apache-2.0 licence. It is a 6-layer board of 192.1 × 96 mm with 15 parts on 253 nets, routed with 449 tracks and 43 vias.
Its parts include 13 resistors, 1 IC and 1 connector.
README
README.mdac922interposer
The purpose of this design is to enable the AC922 to accept a DC-SCM v1.0 hardware management module. This enables a developement platform for software development.
For connection with a DC-SCM, the DC-SCM v1.0 release design specifies the connector as an SFF-TA-1002 compliant 4C+ connector. The 4C+ connector is a 4C compliant connector with an additional 28-pin “OCP bay” defined in the OCP NIC 3.0 specification. The right-angled variety allows for the DC-SCM to lay within the BMC cage assembly. This can be implemented with TE 2336568-1.
References:
DC-SCM 0.95 Draft Specification: https://www.opencompute.org/documents/ocp-dc-scm-spec-rev-0-95-pdf
DC-SCM 2.0 Draft Specification: https://drive.google.com/file/d/1UkFgAFKh8qz4mAXdvodYsW0fg8XhyVf2/view?usp=sharing
AC922 Specification: see OpenPower website
SFF-TA-1002 Protocol Agnostic Multi-Lane High Speed Connector https://members.snia.org/document/dl/27231
AntMicro Design Specification: https://github.com/antmicro/artix-dc-scm.git
Parts
15| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | R | Resistor_SMD:R_0805_2012Metric | R4, R5, R6, R7, R8, R9 |
| 3 | 4.7k | Resistor_SMD:R_0805_2012Metric | R1, R2, R10 |
| 1 | 10k | Resistor_SMD:R_0805_2012Metric | R12 |
| 1 | 2336568-1 | ac922interposer:TE_2336568-1 | J1 |
| 1 | 3.9k | Resistor_SMD:R_0805_2012Metric | R13 |
| 1 | 330 | Resistor_SMD:R_0805_2012Metric | R11 |
| 1 | 3k | Resistor_SMD:R_0805_2012Metric | R3 |
| 1 | molex_impact_85ohm_left_and_right_guided_240pin_0.39mm | kicad-molex-impact:molex_impact_85_ohm_left_and_right_guided_240 | U1 |
Questions
How big is the Ac922interposer PCB?
It measures 192.1 × 96 mm and has 6 copper layers, 1.6 mm thick.
What parts does the Ac922interposer use?
15 parts. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Ac922interposer KiCad files?
From the OpenPOWERFoundation/ac922interposer repository on GitHub, at the commit this page was made from: the board is ac922interposer.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Ac922interposer design in my own project?
Its repository publishes it under the Apache-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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