| 摘要 |
PURPOSE:To shift the right to use a memory on every access operation and to utilize the memory effectively by inputting an access control signal directly to a control circuit and carrying out switching every time word access unit is attained. CONSTITUTION:An arithmetic processor 1A when reading data out of a memory device 4 inputs the access control signal CTRL#A of a signal READ to a control circuit 3. The control circuit 3 sends back an acknowledge signal ACK#A if the output Q of a flip-flop 13 is (1). Switches 5, 6, and 7 are driven through a selection signal line 20A to connect a control signal line 16A, address signal line 18A, and data signal line 19A to the memory device 4. The calculating processor 1A once reading data stops sending the control signal CTRL#A and the transmission of the acknoweldge signal ACK#A is stopped. |
