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## Project description
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The **GBT-based Expandable Front-End (GEFE)** is a multipurpose
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FPGA-based radiation tolerant card. It is foreseen to be the new
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standard FMC carrier for digital front-end applications in the CERN
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BE-BI group. Its intended use ranges from fast data acquisition systems
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to slow control installed close to the beamlines, in a radioactive
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environment exposed to total ionizing doses of up to 600 Gy. The GEFE
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takes advantage of the Giga Bit Transceiver (GBT)/Versatile Link
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platform developed by the CERN PH-ESE group. This provides a radiation
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hard, high-speed (4.8Gbps), bidirectional, optical link for
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*The GBT-based Expandable Front-End (GEFE) is a multipurpose FPGA-based
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radiation tolerant card.** It is foreseen to be the new standard FMC
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carrier for digital front-end applications in the CERN BE-BI group. Its
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intended use ranges from fast data acquisition systems to slow control
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installed close to the beamlines, in a radioactive environment exposed
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to total ionizing doses of up to 600 Gy.
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The GEFE takes advantage of the Giga Bit Transceiver (GBT)/Versatile
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Link platform developed by the CERN PH-ESE group. This provides a
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radiation hard, high-speed (4.8Gbps), bidirectional, optical link for
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communication with back-end electronics, and multiple low-speed
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(40@80MHz, 20@160MHz or 10@320MHz) electrical links (e-links) for
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communication with digital front-end electronics. The link can be fixed
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addition to the high-speed optical link, the GEFE features a custom
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Electrical Serial Link Transceiver (ESLT) to be used in low-speed
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communications over copper cable through long distances (tested up to
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2km). In order to maximize the versatility, the GEFE is expanded with
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2km).
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In order to maximize the versatility, the GEFE is expanded with
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dedicated front-end cards through a High-Pin Count FPGA Mezzanine Card
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(FMC HPC) connector which features up to 160 user-specific I/Os (that
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can be configured both as single-ended or differential pairs) as well as
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... | ... | @@ -30,6 +33,7 @@ the GEFE offers 2 general purpose low-pin count connectors. Both present |
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the same form-factor, though one of them feature 13 noise shielded
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user-specific I/Os (where 8 of these I/Os may be directly connected to
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the FMC HPC), whilst the other connector features 24 user-specific I/Os.
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The interface between the e-links and the digital front-end electronics
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connected to the FMC HPC and/or the two general purpose connectors, as
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well as the control of the different on-board resources (e.g. LEDs,
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... | ... | @@ -45,11 +49,14 @@ tolerance is a |
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requirement.
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![](/uploads/81481e3cc4cbc51354839bc667b51e07/gefe_v1_3d_perspective.png)
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*GEFE v1 3d Model**
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\*GEFE v1 3D Model ([top
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view](https://www.ohwr.org/project/gefe/uploads/7616e23dcefa19f149e6be378ce79469/gefe_v1_3d_top.png), [bottom
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view](https://www.ohwr.org/project/gefe/uploads/d9b35c7295270d1d5f020e5cd0bd2928/gefe_v1_3d_bottom.png)*)
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## Main features
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- Rad-hard FPGA (Microsemi ProAsic3) (TID up to 750 Gy)
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- Rad-hard FPGA (Microsemi ProAsic3, A3PE3000-FGG896) (TID up to 750
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Gy)
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- Features different components of the GBT-Versatile Link ecosystem
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from CERN PH-ESE
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- VTRx
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- One high-speed bidirectional optical link (Versatile Link) (4.8
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Gbps)
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- One custom low-speed bidirectional electrical link (tested up to
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10 Mbps over 2 Km of coaxial cable)
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10 Mbps over 2 km of coaxial cable)
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- Upgradable:
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- Socket for one expansion FMC HPC for user-specific I/Os
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(Note\!\! High-speed lanes are used as standard user-specific
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I/Os and for special purposes)
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Note: High-speed lanes are used as standard user-specific I/Os
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and for special purposes
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- Two general purpose connectors for user-specific I/Os (13 & 24
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pins)
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- Several general purpose I/O resources (e.g. push button, etc.)
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... | ... | @@ -74,7 +81,8 @@ requirement. |
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- FPGA programming
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- Slow Control (SC) E-link
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- Power
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- The GEFE presents a small custom form factor (205x100mm).
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- Small custom form factor (205x100mm)
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- 12-layer PCB
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-----
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... | ... | @@ -82,10 +90,16 @@ requirement. |
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- Official design data [EDMS
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EDA-03168-V1](https://edms.cern.ch/nav/EDA-03168)
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- [GEFE Specifications](https://www.ohwr.org/project/gefe/wikis/Documents/GEFE-Specifications-(v2.0.0))
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- [The GBT-based Expandable Front-End
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(GEFE)](https://www.ohwr.org/project/gefe/wikis/Documents/GEFE-Presentation--RadWG-(02/07/15)) presentation July 2015
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### Users
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- To be completed
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- CERN BE/BI Beams Instrumentation
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- SPS beam positioning monitoring
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- Motor control
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- Awake project
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### Contact
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... | ... | @@ -102,17 +116,29 @@ requirement. |
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<td><b> Event </b></td>
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</tr>
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<tr class="even">
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<td>03-02-2015</td>
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<td>Inclusion of project on OHWR</td>
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<td>12-2014</td>
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<td>First ideas about the project.</td>
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</tr>
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<tr class="odd">
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<td>02-2015</td>
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<td>Inclusion of project on OHWR.</td>
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</tr>
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<tr class="even">
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<td>03-2015</td>
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<td>Start of schematics design.</td>
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</tr>
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<tr class="odd">
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<td>04-07-2015</td>
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<td>First OHWR Wiki update.</td>
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<td>19-06-2015</td>
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<td>First version of PCB layout.</td>
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</tr>
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<tr class="even">
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<td>03-07-2015</td>
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<td>Design review comments received.</td>
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</tr>
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</tbody>
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</table>
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-----
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Manoel Barros Marin - 04 July 2015
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Manoel Barros Marin - 07 July 2015
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