| 摘要 |
PROBLEM TO BE SOLVED: To provide a control system, a communication system and a communication device capable of preventing the number of signals from increasing by using serial communications in sending and receiving data between devices, and of efficiently performing the serial communications.SOLUTION: Serial communications are employed to send and receive data between a microcomputer 2 and a custom IC 3. The custom IC 3 is provided with a register 33 defining the kind of data to be stored for an address. An address corresponding to the kind of data to be sent to the microcomputer 2 is stored in the register 33. For the serial communications, the microcomputer 2 designates an address that requests the customer IC 3 to send data, and the custom IC 3 reads the designated address and data stored in the address afterwards from the register 33 and sends them in sequence. The microcomputer 2, after receiving the data that it needs, can order the custom IC 3 to stop the serial communications by means of a CS signal. |
