| 摘要 |
PURPOSE:To eliminate loss time attended with data transfer by controlling the system so as to transmit a data at a prescribed time after transmitting a data transmission notice signal to a device at the reception side at the prescribed time before from a point of time transmitting the data actually from a device at the transmission side in case transmitting and receiving the data between two devices operated asynchronizingly, to allow the device at the reception side to interrupt its operation within the own device and to receive the said data in good timing. CONSTITUTION:A device (a) transmits a data transmission notice signal B to a device (b) at a prescribed time before a data read by an access request signal A is finished. The device (b) interrupts the access processing to a buffer storage (BS) 22 executed by a memory control circuit G by means of the said data transmission notice signal B to receive a data C transmitted from the device (a). The device (b) is controlled so that the said data C is stored in a register H at a prescribed time after the data transmission notice signal B is received. The data stored in the register H is transmitted to in signals D, E, F of an access source in a proper timing. |
