An interferometric modulating device is provided with a spacing layer positioned between the fixed reflector and the electrode. In some embodiments, the step of combining includes forming a logical-AND of the threshold-compared hamming-distance indicator and the threshold-compared multiple-correlation indicator. The data processor generates an address of data to be transferred in the local memory according to the transfer parameter, and transfers data tofrom the local memory using the generated address, in addition to transferring data tofrom the interface section.