Server/MHS/DC-MHS-Specs-and-Designs

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Welcome

Disclaimer: Please do not submit any confidential information to the Project Community. All presentation materials, proposals, meeting minutes and/or supporting documents are published by OCP and are open to the public in accordance to OCP's Bylaws and IP Policy. This can be found on the OCP OCP Policies page. If you have any questions please contact OCP.

DC-MHS R1 v1.0 specs have been approved by the OCP Incubation Committee in November 2022.

DC-MHS workstreams are still working the MHS R1 v1.x specifications.

A link to a Readme file explaining how to use the following tables (Latest DC-MHS Specifications, Errata and Supporting Documentation, and Inactive Documents) is here: Link

Specifications

Latest DC-MHS Specifications

Note: The Final Spec Agreement (FSA) for the latest specs has not yet been signed. You may access the released versions in the Contribution Database (Contribution Database).

Type Description Version Submit Date Contributor Link Notes
Specification M-PIC Base Specification 1.1 12/16/24 Clifford DuBay Link (no change bar)
Link (CB Version) 		Updates:
  • MAJOR RELEASE
  • Merged the M-PIC Base Specification 48V Addendum v0.9 content to add 48V support to M-PIC Base Spec
  • Clarified 12V PICPWR connectivity.
  • Changed SMBus pull-ups from 100kΩ to RPU.
  • Clarified SGPIO waveform bit ordering.
  • Added HPM and peripheral requirements for configurations with more than one 12V_PRIMARY domain.
Specification M-FLW Base Specification 1.2 RC3 10/10/24 Corey Hartman Link (no change bar)
Link (CB Version) 		Updates:
  • Added info for DSFF NIC, removed LFF NIC
  • Loosened requirements for PIC.PWR
Specification M-PnP v0.3 Release Package (.zip file - no preview) v0.30 10/10/24 Phillip Leech Link (v0.3 Release Package) This contains five files including a Readme.txt file.
  • OCP_M-PNP_INTEROP_Design_Spec_v0.3.0.pdf
  • OCP_M-PnP_FRU_Discovery_Boot_Spec_v0.3.0.pdf
  • OCP_HPM_FPGA_Spec_v0.3.0.pdf
  • hpm-fru-mockup v0.5.2.json
Specification M-CRPS Base Specification 1.05 RC5 10/01/24 Aurelio Rodriguez Echevarria Spec Link

Mech Drawing Link

Update:
  • Numerous Changes See Change Log.
Specification M-SDNO Base Specification 1.0 RC2 6/13/24 Mike Gregoire Link (no change bar)
Link (CB Version) 		Updates:
  • Added second control panel location option for Class C
  • Various figure cleanup and text clarification for release
Specification M-DNO Base Specification 1.1 RC2 3/21/2024 Mike Gregoire Link (non CB Version)
Link (CB version) 		Updates:
  • Completed M-DNO Type 3 length to be consistent with M-SDNO.A555
  • Updated M-DNO to be consistent with M-SDNO
Specification M-PESTI Base Specification 1.2 RC2 3/14/24 Jeff Kennedy Link (no change bar)
Link (CB Version) 		Several small updates including:
  • Modifying the presence pulldown range.
  • Amending payload format.
Specification M-XIO Base Specification 1.04 RC1 2/28/24 Charlie Ziegler Link (non CB Version)

Link (CB version)

Updates:
  • Update compliance link.
  • Fix typos.
Specification M-SIF Base Specification 0.5 10/2/2023 Greg Sellman 0.5 Link (non CB Version)

0.5 Link (CB version)

Updates to high-speed IO & management interfaces. Connectors defined.

Latest DC-MHS MCAD

Spec. Impacted Name Format Version Submit Date Contributor Link Notes
SDNO M-SDNO Class “A” Zip CAD Files STP CAD 6/13/24 Brian Aspnes Link Includes A305, A335, and A555.
SDNO M-SDNO Class “B” Zip CAD Files STP CAD 6/13/24 Brian Aspnes Link Includes B305, B335, and B555.
SDNO M-SDNO Class “C” Zip CAD Files STP CAD 6/13/24 Andy Junkins Link Includes C305, C335, and C555.
SDNO M-SDNO Class “D” Zip CAD Files STP CAD 6/13/24 Andy Junkins Link Includes D305, D335, and D555.
DNO M-DNO Type 3 MCAD STP CAD 3/21/24 Brian Aspnes Link Type 3 CAD File
FLW T1 FLW STP CAD 5/23/2023 Brian Aspnes Link  
DNO DNO Type 4 MCAD STP CAD 2/15/23 Mike Gregoire DNO Type 4 Link Type 4 CAD
DNO DNO Type 2 MCAD STP CAD 10/26/22 Mike Gregoire Link Type 2 CAD Files

Latest Design Specs

Spec. Impacted Name Format Version Submit Date Contributor Link Notes
M-CRPS M-CRPS Design Specifications October 2024 Release Package Design Specs Zip 10/01/24 Aurelio Rodriguez Echevarria Link Zip File
M-HPM DC-MHS Common Chassis Design for Differing HPM Thickness and CRPS Connector Offsets Design Spec PDF 4/17/24 Patrick Hampton Link PDF File

Supporting Documentation

This section includes supporting information.

Spec. Impacted Name Format Version Submit Date Contributor Link Notes
PIC Current Connector List Document 1 2/1/2023 Cliff DuBay Link M-PIC Connector List

Inactive Documents

This section includes outdated documents.

Spec Impacted Name Format Version Submit Date Contributor Link Notes
Specification M-PIC Base Specification 48V Addendum PDF 0.7 10/15/2024 Cliff DuBay 0.7 Link (non CB Version)

0.7 Link (CB version)

Updates:
  • Updated dedicated 48V supply input sources from “ORV3 rack” to “48V rack busbar”.
  • Updated 48V_SUPPLY and 48V_PRIMARY requirements like what was done for 12V_PRIMARY in M-PIC v1.06.
  • Updated the PDB introduction in section 10.2.14 to account for two connector types.
  • Added a link to “Open_Rack/SpecsAndDesigns” in section 13.
  • Added images for all 48V connectors.
  • Added excursion support requirements for 48V connectors.
  • Added provisions for more than one dedicated 48V supply connector throughout.
  • Added missing requirements for a 48V Architectures.
Specification M-PIC Base Specification PDF 1.06 10/15/2024 Cliff DuBay 1.06 Link (non CB Version)

1.06 Link (CB version)

Updates:
  • Reordered 12V_PRIMARY Requirements.
  • Clarified SMBus pull-up location.
  • Added FLEXIO electrical requirements.
  • Clarified FLEXIO bias and destination requirements.
  • Corrected the outline flow for Cabled Boot Peripheral.
Specification M-PIC Base Specification 48V Addendum PDF 0.6 6/6/2024 Cliff DuBay 0.6 Link (non CB Version)

0.6 Link (CB version)

Updates:
  • Added updates from M-PIC v1.05.
  • Updated PDB Management naming.
  • Added 48V requirements to the Compliance Checklist.
  • Updated from ORv3 to 48V Rack throughout.
  • Added a requirement for 48V peripherals that also use 12V in section 10.2.11.
  • Removed the requirement for 12V PICPWR connectors to be used for egress only on 48V HPMs and PDBs.
  • Added a contributor.
Specification M-PIC Base Specification PDF 1.05 5/17/2024 Cliff DuBay 1.05 Link (non CB Version)

1.05 Link (CB version)

Updates:
  • Clarified SB signals to be unique per channel instead of per connector.
  • Simplified peripheral input requirements in section 9.1.6.
Specification M-FLW Base Specification PDF 1.1 RC2 4/5/2024 Brian Aspnes Link (non CB Version)
Link (CB version) 		Updates:
  • Updated M-FLW to be consistent with M-SDNO and M-DNO
M-CRPS M-CRPS Base Specification PDF 1.04 RC3 2/22/24 Aurelio Rodriguez Echevarria RC3 Link

Mech Dwg

Update:
  • Updated typo in a dimension in the following mechanical drawings.
SDNO M-SDNO Base Specification PDF 0.9 RC2 4/18/24 Mike Gregoire Link (no change bar)
Link (CB Version) 		Updates:
  • Added option to support 2nd DC-DCM and DSFF NIC for Class C/D HPMs
SDNO M-SDNO Class “C” Zip CAD Files STP CAD 4/18/24 Andy Junkins Link Includes C305, C335, and C555.
SDNO M-SDNO Class “D” Zip CAD Files STP CAD 4/18/24 Andy Junkins Link Includes D305, D335, and D555.
SDNO M-SDNO Class “A” Zip CAD Files STP CAD 1/22/24 Brian Aspnes Link Includes A305, A335, and A555.
SDNO M-SDNO Class “B” Zip CAD Files STP CAD 1/22/24 Brian Aspnes Link Includes B305, B335, and B555.
CRPS M-CRPS Design Specifications Zip (inc PDF) 1 4/17/2024 Aurelio Rodriguez Echevarria Link CRPS Design Specifications.
PIC M-PIC Base Specification 48V Addendum PDF 0.3 3/1/24 Cliff DuBay 0.3 Link (non CB Version)

0.3 Link (CB version)

Update:
  • Early directional version (0.3) of the M-PIC Base Specification 48V Addendum.
  • The 48V content is being developed in a separate document with the intent to integrate it into the main M-PIC specification once the content is ready.
PIC M-PIC Base Specification PDF 1.04 3/1/24 Cliff DuBay 1.04 Link (non CB Version)

1.04 Link (CB version)

Update:
  • Addressed V1.03 Errata.- Updated FULL_PWR_CYCLE_N/FLEXIO to avoid power-up failures.
  • Updated PICPWR labeling requirements.
  • Updated DC-SCM revisions supported.
  • Simplified/clarified +12VStby "OR-ing", cable construction expectations, control panel SPI, and DC-SCM.
SDNO/FLW/DNO M-HPM 1033 Errata Document PDF 1 2/21/2024 Mike Gregoire Link Corrected datum references when dimensioning 1033 riser locations which do not align with the released SFF-TA-1033 V1.0.
PIC M_PIC_R1_V1.03_Errata PDF 1.03 2/1/2024 Cliff DuBay Link Errata # 1: Update the description and requirements for the FULL_PWR_CYCLE_N/FLEXIO pin to avoid power-up failures.
SDNO M-SDNO Base Specification PDF 0.7 RC3 1/29/24 Brian Aspnes 0.7 RC3 Link Update:
  • Major Changes including Class C Definition and Class C/D Primary SCM/NIC moved for common chassis.
SDNO M-SDNO Class “C” Zip CAD Files STP 0.7 1/22/24 Brian Aspnes Link Includes C305, C335, and C555.
SDNO M-SDNO Class “D” Zip CAD Files STP 0.7 1/22/24 Brian Aspnes Link Includes D305, D335, and D555.
CRPS M-CRPS Base Specification PDF 1.03 RC2 12/15/23 Aurelio Rodriguez Echevarria 1.03 RC2 Link

Mech Dwg

Update:
  • Multiple updates to many sections
  • Updated pictures and figures
  • Fixed typos
XIO M-XIO Base Specification PDF 1.03 11/21/23 Javier Lasa 1.03 Link (non CB Version)

1.03 Link (CB version)

Update:
  • Version 1.03 of the specification with and without change bar.
  • Changed pull-up from 127Kohm to 100Kohm on FLEXIO / CBL_PRES_PESTI_N topologies.
SNDO M-SDNO Base Specification PDF 0.5 10/2/2023 Brian Aspnes 0.5 Link Replaces the (Directional) M-DNO Specification Updates for HPM Types 5-7 0p3 RC2.pdf specification.
SDNO M-SDNO Class “A” Zip CAD Files STP 0.5 10/2/23 Brian Aspnes Link Includes A305, A335, and A555.
SDNO M-SDNO Class “B” Zip CAD Files STP 0.5 10/2/23 Brian Aspnes Link Includes B305, B335, and B555.
SDNO M-SDNO Class “D” Zip CAD Files STP 0.5 10/2/23 Brian Aspnes Link Includes D305, D335, and D555.
PIC M-PIC Base Specification PDF 1.03 9/28/2023 Cliff DuBay 1.03 Link (non CB Version)

1.03 Link (CB version)

Update:
  • SGPIO and PDB Management RFU
  • Cable Optimized boot connector rating & power control
  • I3C recommendations
  • SB - signal termination
CRPS M-CRPS Base Specification PDF 1.02 RC2 8/23/2023 Aurelio Rodriguez Echevarria 1.02 RC2 Link

1.02 RC2 Mechanical Drawings

Update:
  • Multiple updates to many sections
  • Updated pictures and figures
CRPS M-CRPS Base Specification PDF 1.01 RC2 7/26/2023 Aurelio Rodriguez Echevarria 1.01 RC2 Link
1.01 RC2 Mechanical Drawings 		Update:
  • Integrated Errata
  • Updated pictures and figures
M-DNO M-DNO Base Specification PDF 1.01 RC2 7/20/23 Mike Gregoire 1.01 RC2 Link (non CB Version)

1.01 RC2 Link (CB version)

Updates:
  • Updated tables, link1.01 RC2 Link (non CB Versions, pictures)
PESTI M-PESTI Base Specification PDF 1.1 RC5 7/18/2023 Jeff Kennedy 1.1 RC5 Link (no change bar)
1.1 RC5 Link (CB Version) 		Update:
  • BAUD accuracy tolerance changed to +/-2%.
  • Overall clarification on the spec, general clean up.
  • Simplified payload headers and source to destination discovery examples.
  • See specification for detailed updates.
(Directional) M-DNO Types 5-7 0p3 RC2 Updated CAD Files for Type 7 STP 1.0 6/1/23 Andrew Junkins Link Type 7 CAD Files - updated to match M-DNO v0.3 RC2 specification
FLW M-FLW Base Specification PDF v1.01 RC2 6/1/2023 Brian Aspnes 1.01 RC2 Link
1.01 RC2 Link (CB Version)
  • Fixes for date mismatches and Figure numbers.
  • Change bar version
(Directional) M-DNO Types 5-7 0p3 RC2 Updated CAD Files for Type 6 STP 1.0 5/16/23 Brian Aspnes Link Type 6 CAD Files
(Directional) M-DNO Types 5-7 0p3 RC2 Updated CAD Files for Type 5 STP 1.0 5/16/23 Brian Aspnes Link Type 5 CAD Files
(Directional) M-DNO Specification Updates for HPM Types 5-7 0p3 RC2 M-DNO Base Specification PDF v0.3 RC2 5/16/23 Mike Gregoire 0.3 Link (Directional) M-DNO Specification Updates for HPM Types 5-7
SIF M-SIF Base Specification PDF 0.3 3/29/2023 Dirk Blevins Link Early version (0.3) of the M-SIF specification
XIO M-XIO Base Specification PDF 1.02 3/16/2023 Javier Lasa Version 1.02
Link 		Update:
  • Version 1.02 of the Specification with the Change Bar.
  • Added a compliance table.
PIC M-PIC Base Specification PDF 1.02 3/13/2023 Clifford DuBay Version 1.02
Link 		Update:
  • Version 1.02 of the Specification with the Change Bar.
  • Improved compliance requirement visibility, clarified OR-ing requirement for +12V sources, & added contributors.
CRPS Errata PDF RC4 Rev 2 4/25/23 Aurelio Rodriguez Echevarria Link Corrections in Rev 1.0 RC4 of the M-CRPS specification.
CRPS Errata PDF RC4 Rev 1 4/3/2023 Aurelio Rodriguez Echevarria Link Fixes typos and drawing errors.
PIC M-PIC Base Specification PDF 1.01 2/3/2023 Clifford DuBay Version 1.01
Change Bar
  • Version 1.01 of the Specification with the Change Bar.
  • Update Figures and Tables, add Errata content, include Hot Plug information.
PIC M-PIC Errata 1 and 2 PDF 1.0 2/1/2023 Clifford DuBay Link
  • Errata 1: Update Section 9.1 to Avoid High Current in Partial-Mate Conditions
  • Errata 2: Update Section 9.1.7.6 to increase the Power Rating from 1080W to 2000W.
XIO M-XIO Base Specification PDF 1.01 RC1 1/24/2023 Javier Lasa Link Incorporated Errata #1. ECN: Addition of cable construction considerations, incorporated cable considerations (alignment with PCI-SIG internal cable spec), clarification on P3V3_MGMT usage.
XIO Errata PDF 1.0 12/12/2022 Javier Lasa Link Update SFF-TA-1016 and SFF-TA-1033 pinouts.
DNO M-DNO Type 3 CAD Files STP 1 10/26/22 Mike Gregoire Link Type 3 CAD Files
XIO M-XIO Specification PDF 1.0 RC4 9/28/2022 Javier Lasa Link Reviewed in Oct meeting. Approved by the IC on 11/4/2022
PESTI M-PESTI Specification PDF 1.0 RC2 9/28/2022 Javier Lasa Link Reviewed in Oct meeting. Approved by the IC on 11/4/2022
DNO M-DNO PDF 1.0 RC5 9/28/22 Michael Gregoire Link Reviewed in Oct meeting. Approved by the IC on 11/4/2022
FLW M-FLW Specification PDF 1.0 RC5 9/28/2022 Corey Hartman Link Reviewed in Oct meeting. Approved by the IC on 11/4/2022
CRPS M-CRPS Specification PDF 1.0 RC4 9/28/22 Aurelio Rodriguez Echevarria Link Reviewed in Oct meeting. Approved by the IC on 11/4/2022
PIC M-PIC Specification PDF 1.0 RC7 9/28/2022 Clifford DuBay Link Reviewed in Oct meeting. Approved by the IC on 11/4/2022
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