| 摘要 |
A data transfer system includes a transceiver and a data processing apparatus coupled to the transceiver through a first line, a second line, and a third line. A data transfer method for the data transfer system includes, when data is transferred from the transceiver to the data processing apparatus, transmitting a first trigger signal from the data processing apparatus to the transceiver through the first line, transmitting a first clock signal from the transceiver to the data processing apparatus through the second line in response to the first trigger signal, and transmitting first transfer data from the transceiver to the data processing apparatus through the third line in synchronization with the first clock signal. On the other hand, the data transfer method includes, when data is transferred from the data processing apparatus to the transceiver, transmitting a second trigger signal from the data processing apparatus to the transceiver through the first line, transmitting a second clock signal from the transceiver to the data processing apparatus through the second line in response to the second trigger signal, and transmitting second transfer data from the data processing apparatus to the transceiver in synchronization with the second clock signal. According to such a data transfer method for the data transfer system, the handshake signal output side is not changed between the data transmission side and the data reception side and one signal line is used to transfer the handshake signal. Therefore, the data transfer can be performed by the data transfer system simpler than the conventional data transfer system.
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