Connecting Spansion SPI serial flash to configure Xilinx FPGAs

Xilinx FPGAs are PLDs used for basic logic functions, chip-to-chip connectivity, signal processing and embedded processing. These devices are programmed and configured using an array of SRAM cells that need to be re-programmed on every power-up. Several different methods of configuring FPGAs are normally used. They include programming by a microprocessor, JTAG port or directly by a serial PROM or flash. Spansion's SPI flash can be easily connected to Xilinx FPGAs to configure the FPGA at power-up. The SPI configuration mode is supported for Xilinx VirtexTM-5 and SpartanTM-3E, Spartan-3A, Spartan-3AN and Spartan-3A DSP FPGA families.

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