Patent ID: 7490182

Claim:
A switching control circuit for controlling operations of a plurality of elements, said switching control circuit comprising: a serial-to-parallel converter for performing serial-to-parallel conversion for converting a first control signal into a first parallel signal, and outputting the first parallel signal; a rewritable storage device having a write mode and a read mode selectively switched over in response to a storage mode switching signal, storing therein data of the first parallel signal in the write mode, and outputting the stored data as a second parallel signal in the read mode; a decoder for executing the following according to the write mode or the read mode of said rewritable storage device: in the read mode, said decoder decoding the first control signal and the second parallel signal so as to generate and output a plurality of element control signals to said plurality of elements, respectively, and in the write mode, said decoder holding the plurality of element control signals generated in the read mode; and a switch circuit for selectively outputting, in response to the storage mode switching signal, the first control signal to either said serial-to-parallel converter or said decoder.