Use of a data register to effectively increase the efficiency of an on-chip write buffer

摘要

Using a separate data register effectively increases the efficiency of an on-chip write buffer implemented as a FIFO structure. The separate register holds the output data during write cycles, allowing the write buffer FIFO to make the space consumed by the current write available at the start, rather than at the end of the write cycle. This effectively makes the write buffer "four and one-half" entries deep, thereby increasing performance of the buffer without adding additional FIFO entries.