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The HERON-FPGA12 provides a Virtex-4 FX FPGA (Xilinx part number xc4vfx12). For
more part information refer to the Xilinx web site at http://www.xilinx.com . This FPGA
provides user programmable logic along with an embedded Power PC core.
The HERON-FPGA12 connects all of the HERON module signals, except JTAG, to the
FPGA, allowing flexible use of the module’s resources.
The HERON-FPGA12 provides a total of 128Mbytes of SDRAM, directly connected to
the pins of the Xilinx FPGA. This memory is organised as a 32 bit wide bank which can be
used as general-purpose memory by the FPGA, or connected to the Power PC core.
The HERON-FPGA12 provides 16Mbytes of FLASH memory, directly connected to the
pins of the Xilinx FPGA. This memory is intended to hold boot code for the Power PC in
embedded applications.
The HERON-FPGA12 also provides 60 of the FPGA I/Os connected to connectors on
the module. This allows the FPGA to be configured for a variety of I/Os.
The HERON-FPGA12 uses the HERON module’s serial bus to download configuration
bit-streams into the FPGA, allowing the user to configure it with standard functions
provided by HUNT ENGINEERING or functions that they have developed themselves
using the Xilinx development tools. It is also possible for the module to configure the
FPGA from a PROM. This is intended to simplify the deployment of systems after the
FPGA functions have been fully developed.
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HUNT ENGINEERING HERON-FPGA12 USER MANUAL