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## Project description ## Project description
This project describes the development of the hardware of the White This project describes the development of the hardware of the White Rabbit Switch version 4 (WRS-v4). It is to be release under [CERN-OHL-W v2](https://ohwr.org/project/cernohl/wikis/Documents/CERN-OHL-version-2) license.
Rabbit Switch version 4 (WRS-v4). It is to be release under [CERN-OHL-W v2](https://ohwr.org/project/cernohl/wikis/Documents/CERN-OHL-version-2) license.
The White Rabbit Switch is an open hardware design of an **Ethernet switch**. It is a central The White Rabbit Switch is an open hardware design of an **Ethernet switch**. It is a central element of a White Rabbit network and is designed as a part of the [White Rabbit project](https://www.ohwr.org/project/white-rabbit/wiki).
element of a White Rabbit network and is designed as a part of the [White Rabbit
project](https://www.ohwr.org/project/white-rabbit/wiki).
--- ---
[![Fig_37_s](uploads/d6017d796b1a4e66468ecd3431fedb1b/Fig_37_s.png)](uploads/f044b9f339cba4d17e62d4f38dce8f45/Fig_37_l_FP.png)
**Possible design with hot-swappable fans and redundant PSU with basic enclosure** **Possible design with hot-swappable fans and redundant PSU with basic enclosure**
## Project information ## Project information
...@@ -22,121 +16,279 @@ project](https://www.ohwr.org/project/white-rabbit/wiki). ...@@ -22,121 +16,279 @@ project](https://www.ohwr.org/project/white-rabbit/wiki).
- [Analysis of resource utilization for the candidate FPGA choice](uploads/31c7019f3c24cb12ec0f8c79c108af59/WRS-v4-resource-utilization.pdf) by Creotech - dedicated [project](https://ohwr.org/project/wr-switch-hdl-usp-eval/wikis/home) - [Analysis of resource utilization for the candidate FPGA choice](uploads/31c7019f3c24cb12ec0f8c79c108af59/WRS-v4-resource-utilization.pdf) by Creotech - dedicated [project](https://ohwr.org/project/wr-switch-hdl-usp-eval/wikis/home)
- [WRS-v4 hardare specfications](uploads/094e33be886eeebc0aa8e5e6ff0db06c/WRS-4_Hardware_Specification-v1.1.pdf), based on the following inputs: - [WRS-v4 hardare specfications](uploads/094e33be886eeebc0aa8e5e6ff0db06c/WRS-4_Hardware_Specification-v1.1.pdf), based on the following inputs:
- [Study on the features for the WRS-4](uploads/2309166f9f7deb1249f3fa6fcb99c925/Study_on_the_new_hardware_features_for_the_WRS_4.pdf) by SevenSolutions - [Study on the features for the WRS-4](uploads/2309166f9f7deb1249f3fa6fcb99c925/Study_on_the_new_hardware_features_for_the_WRS_4.pdf) by SevenSolutions
- [WRS-4 main board (Hardware_Architecture)](uploads/c4fa8bc97eeeb551c736146eae7b8e25/WRS-4_main_board_Hardware_Architecture_-v1.7-2020-06-09.pdf) by SevenSolutions - [WRS-4 main board (Hardware_Architecture)](uploads/c4fa8bc97eeeb551c736146eae7b8e25/WRS-4_main_board_Hardware_Architecture\_-v1.7-2020-06-09.pdf) by SevenSolutions
- [WR community feedback and its resolution](https://ohwr.org/project/wr-switch-hw-v4/wikis/Feedback-to-WRS-4-hardware-specification) (to be included in the documents above) - [WR community feedback and its resolution](https://ohwr.org/project/wr-switch-hw-v4/wikis/Feedback-to-WRS-4-hardware-specification) (to be included in the documents above)
- [Connector to expansion board](https://ohwr.org/project/wr-switch-hw-v4/uploads/71655353bc093581e62648502a4cb750/WRS-4_Expansion_Connector.pdf) - [Connector to expansion board](https://ohwr.org/project/wr-switch-hw-v4/uploads/71655353bc093581e62648502a4cb750/WRS-4_Expansion_Connector.pdf)
- [Clocking FMC prototype](https://ohwr.org/project/wr-switch-hw-v4/wikis/Clocking-FMC) - [Clocking FMC prototype](https://ohwr.org/project/wr-switch-hw-v4/wikis/Clocking-FMC)
- [WR Clocking FMC Final Performance and tests Report](uploads/de6021064d49cd82b0bf7bc32d81c75e/FCWR_final_report.pdf) - [WR Clocking FMC Final Performance and tests Report](uploads/de6021064d49cd82b0bf7bc32d81c75e/FCWR_final_report.pdf)
- [Main board](/wrs-v4-main-board-schematics) - [Main board](/wrs-v4-main-board-schematics)
- [Enclosure](/enclosure) - [Enclosure](/enclosure)
- [3D view](https://autode.sk/3lCAmS3) - [3D view](https://autode.sk/3lCAmS3)
- [Frequently Asked Questions](faq) - [Frequently Asked Questions](faq)
- Prototypes - Prototypes
- [v0](https://ohwr.org/project/wr-switch-hw-v4/-/wikis/Prototype-v0) - [v0](https://ohwr.org/project/wr-switch-hw-v4/-/wikis/Prototype-v0)
---
--- ---
-----
## Project Roadmap ## Project Roadmap
|**Completion**|**Task**|**Deliverable**|**Status**| <table>
|---------------|--------|---------------|-------| <tr>
|2020: <br /> end March |Study of features, components,<br /> requirements, FPGA/CPU choice - WP1, WP2 | [Study on the features for the WRS-4](uploads/2309166f9f7deb1249f3fa6fcb99c925/Study_on_the_new_hardware_features_for_the_WRS_4.pdf) <br /> [Analysis of FPGA resource utilization](uploads/31c7019f3c24cb12ec0f8c79c108af59/WRS-v4-resource-utilization.pdf) | Completed | <th>
|2020:<br /> end May | 1. Proposal of "WRS-4 main board" - WP3 <br /> 2. Verification of 1Gb transceiver - WP4.1 | 1. Doc:[Proposal of WRS-v4 arch](uploads/c4fa8bc97eeeb551c736146eae7b8e25/WRS-4_main_board_Hardware_Architecture_-v1.7-2020-06-09.pdf)<br /> 2. Demo/prototype | Competed<br />Completed|
|2020: <br />June | Request for feedback from WR community | [Request for comments & <br /> WRS-4 Workshop (26 June 2020)](https://forums.ohwr.org/t/new-white-rabbit-switch-4-0-request-for-comments-and-workshop/848506) <br /> [Feedback and its resolution](https://ohwr.org/project/wr-switch-hw-v4/wikis/Feedback-to-WRS-4-hardware-specification) | Completed | **Completion**
|2020: <br />end July | Update of study/proposal documents | Updated documents | Completed | </th>
|2020: <br />end Dec. | 1. Proper WR support for GTH - WP8 <br /> 2. Verification of 10Gb transceiver - WP4.2 |1. Release of WR cores <br /> 2. Demo| | <th>
|2023: <br />end Feb. | 1. Schematics design - WP5 <br /> 2. PCB layout design (DEM) - WP6 <br /> 3. Enclosure design -WP7 | 1 & 2. Prototypes of PCB <br /> 3. Prototype of enclosure | Completed |
|tbd | Board Support Package (SW) - WP10 | Prototype | | **Task**
|tbd | Production Test Suite (PTS) - WP9 | Product | | </th>
|2024: <br />end Jun. | 1. Porting of gateware + clocking - WP11 <br /> 2. Port of SW with minimal integration of peripherals - WP12 <br /> 3. Integration of new peripherals - WP13| Fully functional WRS at 1GB | | <th>
| 2024:<br /> end Dec| Preparation of first release v1 with 1Gb for timing and data - WP14 | Release | |
| 2025:<br /> end Jun | Add support of 10Gb to the WRS for timing (not data)- WP15 | Prototype | | **Deliverable**
| 2026:<br /> end Jun | Add support of 10Gb to the WRS for data (and timing)- WP17 | Prototype | | </th>
| 2026:<br /> end Dec | Preparation of first release v2 with 10 Gb for timing and data- WP18 | Release | | <th>
**Status**
----- </th>
</tr>
<tr>
<td>
2020: <br>end March
</td>
<td>
Study of features, components,<br>requirements, FPGA/CPU choice - WP1, WP2
</td>
<td>
[Study on the features for the WRS-4](uploads/2309166f9f7deb1249f3fa6fcb99c925/Study_on_the_new_hardware_features_for_the_WRS_4.pdf) <br>[Analysis of FPGA resource utilization](uploads/31c7019f3c24cb12ec0f8c79c108af59/WRS-v4-resource-utilization.pdf)
</td>
<td>Completed</td>
</tr>
<tr>
<td>
2020:<br>end May
</td>
<td>
1\. Proposal of "WRS-4 main board" - WP3 <br>2. Verification of 1Gb transceiver - WP4.1
</td>
<td>
1\. Doc:[Proposal of WRS-v4 arch](uploads/c4fa8bc97eeeb551c736146eae7b8e25/WRS-4_main_board_Hardware_Architecture\_-v1.7-2020-06-09.pdf)<br>2. Demo/prototype
</td>
<td>
Competed<br>Completed
</td>
</tr>
<tr>
<td>
2020: <br>June
</td>
<td>Request for feedback from WR community</td>
<td>
[Request for comments & <br>WRS-4 Workshop (26 June 2020)](https://forums.ohwr.org/t/new-white-rabbit-switch-4-0-request-for-comments-and-workshop/848506) <br>[Feedback and its resolution](https://ohwr.org/project/wr-switch-hw-v4/wikis/Feedback-to-WRS-4-hardware-specification)
</td>
<td>Completed</td>
</tr>
<tr>
<td>
2020: <br>end July
</td>
<td>Update of study/proposal documents</td>
<td>Updated documents</td>
<td>Completed</td>
</tr>
<tr>
<td>
2020: <br>end Dec.
</td>
<td>
1\. Proper WR support for GTH - WP8 <br>2. Verification of 10Gb transceiver - WP4.2
</td>
<td>
1\. Release of WR cores <br>2. Demo
</td>
<td>
GTHE4 supported (tbd: LPDC)
10Gb - not yet
</td>
</tr>
<tr>
<td>
2023: <br>end Feb.
</td>
<td>
1\. Schematics design - WP5 <br>2. PCB layout design (DEM) - WP6 <br>3. Enclosure design -WP7
</td>
<td>
1 & 2. Prototypes of PCB <br>3. Prototype of enclosure
</td>
<td>Completed</td>
</tr>
<tr>
<td>end 2024</td>
<td>Board Support Package (SW) - WP10</td>
<td>Prototype</td>
<td>ongoing</td>
</tr>
<tr>
<td>tbd</td>
<td>Production Test Suite (PTS) - WP9</td>
<td>Product</td>
<td>
</td>
</tr>
<tr>
<td>end 2024</td>
<td>
1\. Porting of gateware + clocking - WP11 <br>2. Port of SW with minimal integration of peripherals - WP12 <br>3. Integration of new peripherals - WP13
</td>
<td>Fully functional WRS at 1GB</td>
<td>
1. Complieted
2. completed
3. ongoing
</td>
</tr>
<tr>
<td>
2024:<br>end Dec
</td>
<td>Preparation of first release v1 with 1Gb for timing and data - WP14</td>
<td>Release</td>
<td>
</td>
</tr>
<tr>
<td>
2025:<br>end Jun
</td>
<td>Add support of 10Gb to the WRS for timing (not data)- WP15</td>
<td>Prototype</td>
<td>
</td>
</tr>
<tr>
<td>
2026:<br>end Jun
</td>
<td>Add support of 10Gb to the WRS for data (and timing)- WP17</td>
<td>Prototype</td>
<td>
</td>
</tr>
<tr>
<td>
2026:<br>end Dec
</td>
<td>Preparation of first release v2 with 10 Gb for timing and data- WP18</td>
<td>Release</td>
<td>
</td>
</tr>
</table>
## Work Packages ---
|**WP**|**Task**|**Company**|**Status**| ## Work Packages
|-------|--------|-----------|-------|
|1| Study of WRS-4 features | Seven Solutions | Completed
|2| Analysis of FPGA resource utilization | Creotech | Competed |
|3| Proposal of WRS-4 main board architecture | Seven Solutions | Competed |
|4| Verification of 1Gb and 10Gb transceiver | CERN | Ongoing |
|5| Schematics design | Seven Solutions | Competed |
|5.1| [Clocking FMC design](https://ohwr.org/project/wr-switch-hw-v4/wikis/Clocking-FMC) (schematics, layout, production) |Seven Solutions | Competed|
|6| PCB layout design (DEM) | CERN |Competed |
|7| Enclosure design | Seven Solutions | Competed |
|8| Proper WR support for GTH | CERN | |
|9| Production Test Suite (PTS) | | |
|10| Board Support Package (SW) | | |
|11| Porting of gateware + clocking | | |
|12| OS/bootloader support and port of SW <br /> with minimal integration of peripherals | | |
|13| Integration of new peripherals | | |
|14| Preparation of first release v1 | CERN | |
|15| Add support of 10Gb to the WRS (timing, not data | | |
|16| Development of formal verification of switch RTL | | |
|17| Add support of 10Gb for data | M2TECH | |
|18| Preparation of first release v2 | CERN | |
|19| Preparation of testbed for the WRS-4|||
-----
| **WP** | **Task** | **Company** | **Status** |
|--------|----------|-------------|------------|
| 1 | Study of WRS-4 features | Seven Solutions | Completed |
| 2 | Analysis of FPGA resource utilization | Creotech | Competed |
| 3 | Proposal of WRS-4 main board architecture | Seven Solutions | Competed |
| 4 | Verification of 1Gb and 10Gb transceiver | CERN | Ongoing |
| 5 | Schematics design | Seven Solutions | Competed |
| 5.1 | [Clocking FMC design](https://ohwr.org/project/wr-switch-hw-v4/wikis/Clocking-FMC) (schematics, layout, production) | Seven Solutions | Competed |
| 6 | PCB layout design (DEM) | CERN | Competed |
| 7 | Enclosure design | Seven Solutions | Competed |
| 8 | Proper WR support for GTH | CERN | |
| 9 | Production Test Suite (PTS) | | |
| 10 | Board Support Package (SW) | CERN/GMV | |
| 11 | Porting of gateware + clocking | | |
| 12 | OS/bootloader support and port of SW <br>with minimal integration of peripherals | | |
| 13 | Integration of new peripherals | | |
| 14 | Preparation of first release v1 | CERN | |
| 15 | Add support of 10Gb to the WRS (timing, not data | | |
| 16 | Development of formal verification of switch RTL | | |
| 17 | Add support of 10Gb for data | M2TECH | |
| 18 | Preparation of first release v2 | CERN | |
| 19 | Preparation of testbed for the WRS-4 | | |
---
## Contacts ## Contacts
### Commercial partners involved: ### Commercial partners involved:
- [Seven Solutions](https://sevensols.com/) - [Seven Solutions](https://sevensols.com/)
- [Creotech](https://creotech.pl/pl/home-3-3-3-2/) - [Creotech](https://creotech.pl/pl/home-3-3-3-2/)
### General question about project ### General question about project
- [Maciej Lipinski](mailto:maciej.lipinski@cern.ch) - CERN - [Maciej Lipinski](mailto:maciej.lipinski@cern.ch) - CERN
----- ---
## Status ## Status
|**Date**|**Event**| | **Date** | **Event** |
|----|----| |----------|-----------|
|07-03-2014|First ideas of a next generation WRS with one or more 10 Gbps ports| | 07-03-2014 | First ideas of a next generation WRS with one or more 10 Gbps ports |
|01-07-2016|First collection of requirements for V4 generation switch requested on [wr-dev mailing list](https://lists.ohwr.org/sympa/arc/white-rabbit-dev/2016-07/thrd1.html#00000) (archive)| | 01-07-2016 | First collection of requirements for V4 generation switch requested on [wr-dev mailing list](https://lists.ohwr.org/sympa/arc/white-rabbit-dev/2016-07/thrd1.html#00000) (archive) |
|07-10-2018|Second collection of requirements for V4 generation switch made on the [10th WR Workshop](https://www.ohwr.org/project/white-rabbit/wikis/oct2018meeting)| | 07-10-2018 | Second collection of requirements for V4 generation switch made on the [10th WR Workshop](https://www.ohwr.org/project/white-rabbit/wikis/oct2018meeting) |
|30-09-2018 | First "Technical proposal for the design of a new White Rabbit Switch" by [Seven Solutions](https://sevensols.com/)| | 30-09-2018 | First "Technical proposal for the design of a new White Rabbit Switch" by [Seven Solutions](https://sevensols.com/) |
|28-11-2018 | [Seven Solutions](https://sevensols.com/) ordered to conduct preliminary design study and produce Technical <br />Specification with definition of architecture and key components selection)| | 28-11-2018 | [Seven Solutions](https://sevensols.com/) ordered to conduct preliminary design study and produce Technical <br>Specification with definition of architecture and key components selection) |
|11-07-2019| Candidate FPGAs: Xilinx Zynq Ultrascale+ and Intel Arria 10 | | 11-07-2019 | Candidate FPGAs: Xilinx Zynq Ultrascale+ and Intel Arria 10 |
|31-07-2019| [Creotech](https://creotech.pl/pl/home-3-3-3-2/) ordered to perform evaluation of the required resources | | 31-07-2019 | [Creotech](https://creotech.pl/pl/home-3-3-3-2/) ordered to perform evaluation of the required resources |
|31-07-2019| Meeting with CERN IT experts (see [notes](https://ohwr.org/project/wr-switch-hw-v4/wikis/features-choice-meeting-with-it)) | | 31-07-2019 | Meeting with CERN IT experts (see [notes](https://ohwr.org/project/wr-switch-hw-v4/wikis/features-choice-meeting-with-it)) |
|09-10-2019|[Creotech](https://creotech.pl/pl/home-3-3-3-2/) delivered [WRS resource utilisation on Xilinx US+ FPGA](uploads/31c7019f3c24cb12ec0f8c79c108af59/WRS-v4-resource-utilization.pdf) | | 09-10-2019 | [Creotech](https://creotech.pl/pl/home-3-3-3-2/) delivered [WRS resource utilisation on Xilinx US+ FPGA](uploads/31c7019f3c24cb12ec0f8c79c108af59/WRS-v4-resource-utilization.pdf) |
|19-10-2019| [Seven Solutions](https://sevensols.com/) delivered first version of "Study on the new hardware features for the WRS-4" | | 19-10-2019 | [Seven Solutions](https://sevensols.com/) delivered first version of "Study on the new hardware features for the WRS-4" |
|28-02-2020| Final choice of FPGA: Zynq Ultrascale+ XCZU17EG-1FFVC1760E | | 28-02-2020 | Final choice of FPGA: Zynq Ultrascale+ XCZU17EG-1FFVC1760E |
|01-04-2020| [Seven Solutions](https://sevensols.com/) delivered final version of [Study on the features for the WRS-4](uploads/2309166f9f7deb1249f3fa6fcb99c925/Study_on_the_new_hardware_features_for_the_WRS_4.pdf) | | 01-04-2020 | [Seven Solutions](https://sevensols.com/) delivered final version of [Study on the features for the WRS-4](uploads/2309166f9f7deb1249f3fa6fcb99c925/Study_on_the_new_hardware_features_for_the_WRS_4.pdf) |
|04-06-2020 | Start of WP5.1 (Clocking FMC design) | | 04-06-2020 | Start of WP5.1 (Clocking FMC design) |
|09-06-2020 | [Seven Solutions](https://sevensols.com/) delivered final version of [WRS-4 main board (Hardware_Architecture)](uploads/c4fa8bc97eeeb551c736146eae7b8e25/WRS-4_main_board_Hardware_Architecture_-v1.7-2020-06-09.pdf)| | 09-06-2020 | [Seven Solutions](https://sevensols.com/) delivered final version of [WRS-4 main board (Hardware_Architecture)](uploads/c4fa8bc97eeeb551c736146eae7b8e25/WRS-4_main_board_Hardware_Architecture\_-v1.7-2020-06-09.pdf) |
|26-06-2020| [New WRS-4 Workshop](https://www.ohwr.org/project/white-rabbit/wikis/New-WRS-4-Workshop)| | 26-06-2020 | [New WRS-4 Workshop](https://www.ohwr.org/project/white-rabbit/wikis/New-WRS-4-Workshop) |
|18-09-2020| [Clocking FMC schematics review](https://ohwr.org/project/wr-switch-hw-v4/wikis/Clocking-FMC)| | 18-09-2020 | [Clocking FMC schematics review](https://ohwr.org/project/wr-switch-hw-v4/wikis/Clocking-FMC) |
|16-11-2020| [WR community feedback and its resolution](https://ohwr.org/project/wr-switch-hw-v4/wikis/Feedback-to-WRS-4-hardware-specification) | | 16-11-2020 | [WR community feedback and its resolution](https://ohwr.org/project/wr-switch-hw-v4/wikis/Feedback-to-WRS-4-hardware-specification) |
|19-11-2020| [WRS-4 Hardware Specification](uploads/f6243e1cf7bc4fcde92e8e818fe461eb/WRS-4_Hardware_Specification-v1.1.pdf) published. It is based on previous feedback and used for the first prototype | | 19-11-2020 | [WRS-4 Hardware Specification](uploads/f6243e1cf7bc4fcde92e8e818fe461eb/WRS-4_Hardware_Specification-v1.1.pdf) published. It is based on previous feedback and used for the first prototype |
|01-02-2021| [Main board schematics review](https://ohwr.org/project/wr-switch-hw-v4/wikis/wrs-v4-main-board-schematics) | 01-02-2021 | [Main board schematics review](https://ohwr.org/project/wr-switch-hw-v4/wikis/wrs-v4-main-board-schematics) |
|11-02-2021| [Clocking FMC](https://ohwr.org/project/wr-switch-hw-v4/wikis/Clocking-FMC) delivered to CERN | | 11-02-2021 | [Clocking FMC](https://ohwr.org/project/wr-switch-hw-v4/wikis/Clocking-FMC) delivered to CERN |
|11-04-2021| [Enclosure mechanical review](https://ohwr.org/project/wr-switch-hw-v4/wikis/enclosure) | | 11-04-2021 | [Enclosure mechanical review](https://ohwr.org/project/wr-switch-hw-v4/wikis/enclosure) |
|08-10-2021| Presentation at [11th WR Workshop](/project/white-rabbit/wikis/Oct2021Meeting): "Next generation White Rabbit Switch version 4" ([pdf](/project/white-rabbit/wikis/uploads/9b3e06e57f29cc272709055140110ce8/Next_generation_WR_Switch_v4.pdf))| | 08-10-2021 | Presentation at [11th WR Workshop](/project/white-rabbit/wikis/Oct2021Meeting): "Next generation White Rabbit Switch version 4" ([pdf](/project/white-rabbit/wikis/uploads/9b3e06e57f29cc272709055140110ce8/Next_generation_WR_Switch_v4.pdf)) |
|26-01-2022| Final and public review of the [WRSv4 Main Board schematics](https://ohwr.org/project/wr-switch-hw-v4/wikis/wrs-v4-main-board-schematics), see [page](https://ohwr.org/project/wr-switch-hw-v4/wikis/wrs-v4-main-board-schematics)| | 26-01-2022 | Final and public review of the [WRSv4 Main Board schematics](https://ohwr.org/project/wr-switch-hw-v4/wikis/wrs-v4-main-board-schematics), see [page](https://ohwr.org/project/wr-switch-hw-v4/wikis/wrs-v4-main-board-schematics) |
|08-04-2022| Schematics design [v1.0 ready](https://ohwr.org/project/wr-switch-hw-v4/wikis/wrs-v4-main-board-schematics#design-files)| | 08-04-2022 | Schematics design [v1.0 ready](https://ohwr.org/project/wr-switch-hw-v4/wikis/wrs-v4-main-board-schematics#design-files) |
|13-05-2022| Layout design started. First version expected in 2-3 months.<br/>All components ordered, the latest delivery expected in October 2022 | | 13-05-2022 | Layout design started. First version expected in 2-3 months.<br>All components ordered, the latest delivery expected in October 2022 |
|13-02-2023| First 3 prototypes v1 of the enclosure received (see [Enclosure prototype v1](https://ohwr.org/project/wr-switch-hw-v4/wikis/enclosure-prototype-v1) ) | | 13-02-2023 | First 3 prototypes v1 of the enclosure received (see [Enclosure prototype v1](https://ohwr.org/project/wr-switch-hw-v4/wikis/enclosure-prototype-v1) ) |
|13-04-2023| Ordering of components for 30 modules, for upcoming versions. <br> Obsolete/hard-to-source components: HMC6832ALP5LE, IS21ES04G-JCLI,<br/>Connector 62674-241121ALF, OSC DOT050V-010.0M, OSC 510FBA125M000AAG | | 13-04-2023 | Ordering of components for 30 modules, for upcoming versions. <br>Obsolete/hard-to-source components: HMC6832ALP5LE, IS21ES04G-JCLI,<br>Connector 62674-241121ALF, OSC DOT050V-010.0M, OSC 510FBA125M000AAG |
|16-05-2023|[Layout review 20230516](https://ohwr.org/project/wr-switch-hw-v4/wikis/layout-review-20230516)| | 16-05-2023 | [Layout review 20230516](https://ohwr.org/project/wr-switch-hw-v4/wikis/layout-review-20230516) |
|12-12-2023|[Layout finalisations and SI/PI 20231212](https://ohwr.org/project/wr-switch-hw-v4/wikis/layout-finalisations-and-si,pi-20231212)| | 12-12-2023 | [Layout finalisations and SI/PI 20231212](https://ohwr.org/project/wr-switch-hw-v4/wikis/layout-finalisations-and-si,pi-20231212) |