| 摘要 |
PURPOSE:To eliminate the need for the separation of data lines and interruption information lines, by placing >=2 input and output signal information storage sections and setting the period of exchange only at the first processing to be repeated. CONSTITUTION:In the information exchange between an I/O storage section and a buffer storage section, data of the buffer storage section is given to a DATA line to bring OUT to an H level. No data is given to an input information line because the data is neglected in the tri-state, but the data is stored in an output line with a latch circuit. Even if the OUT is kept to an L level, the information of data is outputted to the output information line. Further, in bringing IN to the H level, the data on the DATA line is given to the buffer storage section in an RAM for storage. |
