Most FPGAs (all except for a dozen or so) use SRAM to hold the configuration while in operation. SRAM has no limit to how many times it can change states. Off-c

Most FPGAs (all except for a dozen or so) use SRAM to hold the configuration while in operation. SRAM has no limit to how many times it can change states. Off-chip flash typically stores the configuration for long term needs and the FPGA loads the configuration from that at power-up. Applications that require frequent changing of the configuration use processors to load from somewhere else instead (hdd, network, some other storage meachanism.)