| 摘要 |
PURPOSE:To remarkably reduce the data transfer time by applying memory access from both ports simultaneously in a multi-CPU system. CONSTITUTION:In case of data transfer according to the address inputted from the port A, the head address and capacity of a dual port memory C31 and a dual port memory D32 are designated to an address comparator 41. The designation is applied by the jumper setting or the setting by a CPU. Through the designation, the address comparator 41 decides the dual port memory represented by the inputted address and in case of the access to the dual port memory C31, an ENABLE(C) is outputted and in case of the access to the dual port memory D32, an ENABLE(D) is outputted to attain the access to each dual port memory. |
