US Patent 7408808 User configurable commands for flash memory

A memory device includes a plurality of memory dies, each having an assigned address. A register on each die is reset on power-up. Boot data is loaded as part of the initialization routine. If the boot data includes a reconfigured command, that command is loaded into the register. A signal is generated if the register has been altered by the stored reconfigured command. If the signal indicates that the register has not been altered, a received command is executed without reconfiguration. If the signal indicates that the register contains something other than the reset state, the contents of the register are compared with the received command. If the received command and the register contents are equal, the reconfigured command is executed.