Data transfer device and control method of data transfer device

A data receiving circuit connected to a data transmitting circuit that transmits data, the data receiving circuit comprising:

• the data transmitting circuit includes an error detection code generating unit that generates an error detection code for detecting an error in the data;
• and a transmission unit that transmits the data and the generated error detection code together with retransmit enable information representing that corresponding data transmitted before the data or transmitted next the data can be retransmitted,
• a reception unit that receives the transmitted data, the transmitted error detection code and the transmitted retransmit enable information;
• an error detection unit that detects the error in the received data based on the received error detection code;
• an error data retaining unit that retains the received data in which the error is detected when the reception unit receives the transmitted retransmit enable information;
• an error data comparing unit that compares the error detected data retained in the error data retaining unit with the corresponding data that is retransmitted;
• and
• a reference retaining unit that retains reference data having a predetermined bit pattern,
• wherein the reference retaining unit sends the reference data when the received data that the error is detected is fixed data having the predetermined bit pattern, and
• the error data comparing unit compares the fixed data that the error is detected with the reference data being sent from the reference retaining unit.

A control method of a data transfer device including a data transmitting circuit that transmits data and a data receiving circuit that receives the transmitted data, the control method comprising:

• generating, by an error detection code generating unit included in the data transmitting circuit, an error detection code for detecting an error in the data;
• transmitting, by a transmission unit included in the data transmitting circuit, the data and the generated error detection code together with retransmit enable information representing that corresponding data transmitted before the data or transmitted next the data can be retransmitted;
• receiving, by a reception unit included in the data receiving circuit, the transmitted data, the transmitted error detection code and the transmitted retransmit enable information;
• detecting, by an error detection unit included in the data receiving circuit, the error in the received data based on the received error detection code;
• retaining, by an error data retaining unit included in the data receiving circuit, the received data in which the error is detected when the reception unit receives the transmitted retransmit enable information;
• comparing, by an error data comparing unit included in the data receiving circuit, the error detected data retained in the error data retaining unit with the corresponding data that is retransmitted;
• and
• retaining, by a reference retaining unit included in the data receiving circuit, reference data having a predetermined bit pattern,
• wherein the reference retaining unit sends the reference data when the received data that the error is detected is fixed data having the predetermined bit pattern, and
• the error data comparing unit compares the fixed data that the error is detected with the reference data being sent from the reference retaining unit.