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BEE2 v1.0

The BEE2 (Berkeley Emulation Egine) is the current CASPER workhorse signal processing platform.

Learn more about the BEE2 by visiting the BEE2 page:

Most information about setting up and using the BEE2 platform can be found on the now-static wiki:



The BEE2 is a general-purpose processing module based on five high-performance Xilinx FPGAs (Virtex-II Pro 2VP70). In addition to the large amount of processing fabric provided by the FPGAs, the BEE2 also provides up to 20GB of high-speed, DDR2 DRAM memory. Each of the five FPGAs has four independent channels to DDR2 DIMMs which provides very high memory bandwidth. Finally, the FPGAs on the BEE2 are highly connected with both high-speed, serial and parallel links.

The FPGAs are laid out in a star/ring topology with four User FPGAs in a ring and one Control FPGA connected to each user. The User FPGAs each have four independent high speed serial channels (4 bonded MGTs) which are capable of transfering data at 10Gbps through CX4 connectors (both copper and fiber). The User FPGA ring consists of parallel connections of 138 high-speed LVCMOS traces between the FPGAs which can run at a maximum of 400Mbps. The Control FPGA has two high-speed serial channels, 64 LVCMOS traces to each User FPGA, and connections to common peripherals such as 10/100 Ethernet, USB 1.1, RS232 serial, DVI, and GPIOs.


  • FPGA
    • 5x Xilinx Virtex-II Pro XC2VP70-7FF1704 FPGA
  • Interfaces
    • 18x CX4 10Gbps high-speed serial connectors
    • 1x 10/100 RJ45 Ethernet interface
    • 1x RS232 interface
    • 1x HDMI DVI video output
    • 1x USB 1.1 USB-A jack
  • Peripherals
    • 20x DDR2 DIMMs
    • 1x CompactFlash socket


  • v1.0 Deprecated
    • Deprecated prototype version
  • v1.1
    • Reversed 5V connector polarity to match IBOB
    • Changed main DC/DC regulator (P27, P28, P29) mounting holes to plated
    • Added power circuitry for Fujitsu CX4 optical transceiver
    • Adjusted CX4 connector positioning
  • v1.2
    • Added RC circuit to aid TI DVI chip (U18) power-on reset

Usage Manuals, Guides, Memos, etc.

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