The invention relates to a data processing device with a functionally programmable logic circuit and a programming interface. Use of data from previous versions of the file system reduces the amount of data to be stored in the delta directory map file, delta modification data block file, and delta look up table generated for the data portions unique to the newest version of an original file system. The transmit circuit has a first input coupled to the internal data terminal, a second input for receiving an internal clock signal, a first output coupled to the external data terminal, and a second output coupled to the external data strobe terminal. The inside conductor length is shorter than the outside conductor length.