White Rabbit Switch Hardware
Project description
White Rabbit Switch is an open hardware design of an 18-ports Ethernet switch licensed under CERN OHL 1.1. It is a central element of a White Rabbit network and was designed as a part of the White Rabbit project. WR Switch can be used with official firmware releases, but since it is an open hardware design it can be also a hardware platform for other, non-White Rabbit projects.
wr_switch_box.png
Figure 1: WR Switch box*
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. 2) - contains main electronics components, ARM processor, Xilinx FPGA chip, oscillators, memories, etc.
- backplane PCB (fig. 2) - electrical connections to 18 SFP cages, debug USB-uart ports, LEDs, etc.
wr_switch_hw.png
Figure 2: WR Switch PCBs*
Main Features
- Front Panel
- 5 SMC connectors
- 1-PPS input and output
- 62.5 MHz output
- 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 (XC6VLX130T or 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)
- 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 3.3
- current hardware release
- previous releases
Contacts
Commercial producer
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) |
Grzegorz Daniluk - 18 July 2013