| 摘要 |
PURPOSE:To make a high-speed logic LSI versatile by expanding the use field of a high-speed LSI by enabling the input/output of low-speed parallel data for the LSI provided with a logic processing part to be operated at high speed in a bit serial state concerning the high-speed logic LSI enabling the input/output of high-speed serial data and low-speed parallel data. CONSTITUTION:A logic processing part 1 for logically processing the high-speed serial data of a frequency (f) and outputting the processing result as high-speed serial data, P/S conversion part 3 for converting the low-speed parallel input data composed of parallel (n) bits at a frequency f/n to the high-speed serial data, selector 2 for selecting the serial input data and serial data from the P/S conversion part 3 based on a mode switching signal and inputting the selected data to the logic processing part 1, an S/P conversion part 4 for converting the high-speed serial data outputted from the logic processing part 1 to the low-speed parallel output data composed of parallel (n) bits at the frequency f/n are provided on the same LSI clip. |
