White Rabbit Switch Hardware
Project description
White Rabbit Switch is an open hardware design of an 18-ports Ethernet
switch licensed under CERN
OHL 1.2. It is a central
element of a White Rabbit network and was designed as a part of the
White Rabbit
project.
The WR Switch can be used with official
firmware
releases. As the design is open it can also be used as the hardware
platform for other, non-White Rabbit
projects.
Figure 2: WR Switch v3.4: Front view, FMC
connectors*
Figure 3: WR Switch v3.3 back view*
WR Switch hardware consists of three elements:
- WR Switch Box (fig. 1) - is a white metal 19'' 1U case with two cooling fans in the back
- main PCB (fig. 4) - contains main electronics components, ARM processor, Xilinx FPGA chip, oscillators, memories, etc.
- backplane PCB (fig. 4) - electrical connections to 18 SFP cages, debug USB-uart ports, LEDs, etc.
Figure 4: WR Switch v3.3 top view of PCBs*
Main Features
- Front Panel
- 5 SMC connectors
- 1-PPS input and output
- 62.5 MHz output
- 10 MHz output (software configurable)
- 10 MHz input
- 18 cages for Gigabit SFP transceivers (connected to Xilinx GTXs)
- 10/100 Ethernet management port (connected to ARM CPU)
- USB-uart management port (connected to ARM CPU)
- Power and Status LEDs
- Link and Act LEDs for each SFP cage
- 5 SMC connectors
- Back Panel
- 2x USB-uart debugging port (connected to ARM CPU and FPGA I/O pins)
- power button
- 2x cooling fan
- 2x microswitch
- 1x grounding connector
- Xilinx Virtex-6 FPGA (XC6VLX240T)
- Clocking resources
- 1x Low-Jitter Clock Generator (TI CDCM61002, used as DMTD offset clock in WR Switch HDL)
- 1x 25MHz VCXO, FRETHE025 controlled by DAC with SPI interface (AD5662, used to drive CDCM61002 generator)
- 1x 25MHz VCO controlled by DAC with SPI interface (AD5662, used to drive AD9516 generator)
- 1x 25MHz XO oscillator FNETHE025 (main FPGA clock)
- 14-Output Clock Generator with Integrated 1.6 GHz VCO (AD9516, clock signals for Xilinx GTXs, uTCA connectors)
- 1x Internal Oscillator (VM53S3-25.000, tuned to follow WR master clock or followed in Free Running mode)
- ARM Atmel AT91 SAM9G45 CPU
- Memory:
- 64MB DDR2
- 256MB NAND
- 8MB boot flash
- Others:
- 1x FPGA JTAG connector
- 1x ARM JTAG connector
- 2x I2C multiplexer (PCA9548A)
- 1x I2C GPIO driver (PCA9554PW, driving Power and Status LEDs on the front panel)
- 9x I2C GPIO driver (PCA9554PW, driving LEDs for each SFP cage)
- Power supply 100-240VAC, 2.0A, 50-60Hz input, 12V DC, 6.66A, 80W output
- Box dimensions 482.8 x 42.34 x 222 mm
- Certification
- IPC-610 Rev E Class 2
- ISO-9001
- ISO-14001
- CE
- RoHS
Project information
- Production documentation
- Firmware
- WR Switch versions
- Frequently Asked Questions
- Gateware for WR Switch
- Software for WR Switch
Releases
- version 3.4 - current hardware release
- previous releases
Contacts
Commercial producers
- WR Switch - 18/8 SFPs, White Rabbit Technology, Seven Solutions, Spain - key developer of the WR Switch
- White Rabbit Switch – WRS, Creotech, Poland
General question about project
- Erik van der Bij - CERN
Status
Date | Event |
31-03-2009 | Review of Switch MCH card v1 |
01-04-2010 | Switch MCH card v2 PCB ready |
05-03-2012 | CERN received 4 WR v3 switches |
24-01-2013 | White Rabbit switch V3.3 passes all CE marking tests (power, electrical safety, labels, EMI) |
21-02-2013 | GSI, Germany received the first production batch of v3.3 switches |
25-04-2013 | CERN, Switzerland received 10 v3.3 switches |
15-05-2013 | CERN installs one v3.3 WR Switch for CLIC Test Facility (CTF3) |
25-04-2014 | CERN received 4 WR v3.3 switches and will receive soon another four. |
25-09-2014 | Hardware release v3.4 with two programmable clock outputs is out |
01-07-2015 | Switch available from two different manufacturers. |
13-12-2017 | In total over 500 switches produced since start of project. |
Grzegorz Daniluk, Erik van der Bij - 2 March 2018