Every time an SRAM-based device is powered on, the configuration data must be loaded in order to setup the system. The EPCS device is a flash memory device that, once powered up, may hold configuration data used for FPGA configuration. The EPCS device is compatible with every FPGA that supports the AS x1 configuration scheme. You can transition vertically from an EPCS1 device to an EPCS4 or EPCS16 device for an 8-pin SOIC package.
You can switch vertically from an EPCS64 device to an EPCS128 device for a 16-pin SOIC package. In order to configure your FPGA, you can choose which EPCS device to save the configuration data on thanks to the new data decompression capability that is supported.
