FIFO STORAGE DEVICE AND FIFO CONTROL METHOD

摘要

PROBLEM TO BE SOLVED: To effectively use a storage region by collecting two FIFO of FIFO for transmission and FIFO for reception into one FIFO. SOLUTION: A FIFO storage device 10 is provided with a FIFO control section 20 for transmission writing transmission input data in a memory 100 and reading out and outputting transmission data stored in a memory 100 in order of input, a FIFO control section 30 for reception writing reception input data in a memory 100 and reading out and outputting reception data stored in the memory 100 in order of input, a first pointer register 26 storing an address of the memory 100 reading out an address of the memory 100 to which transmission data is written or transmission output data, and second pointer register 36 storing an address of the memory 100 to which reception input data is written or an address of the memory 100 from which reception output data is read out.