Digital signal processing device

A digital signal processing device comprising:

• processing means for performing basic operations including multiplication, addition, data transfer and sequence control operations and for transmitting an instruction signal and a data signal, whereby said instruction signal includes an instruction code, when predetermined special-function operations different from said basic operations are to be performed;
• a plurality of functional block means for performing said predetermined specialfunction operations in accordance with the instruction code of said instruction signal outputted by said processing means and for generating and outputting processed data to said processing means;
• bus means for carrying the instruction signal and the data signal outputted by the processing means to at least one of said plurality of functional block means and for carrying the processed data of at least one of said plurality of functional block means to the processing means;
• and
• block selecting means, connected between said plurality of functional block means and said processing means, responsive to a status signal, for selecting at least one of said plurality of functional block means and for transmitting an enable signal to at least one of said plurality of functional block means enabling said at least one of said plurality of functional block means to receive the instruction signal and the data signal outputted by the processing means via said bus means and to perform at least one of the predetermined special-function operations in accordance with the instruction code of the instruction signal.