| 摘要 |
PURPOSE:To eliminate an alteration of the interface, by installing the check circuit which detects and processes the error information to the devices of the transmission and reception sides each of the information and in the form of the underfined data and then converting the information to be transferred into the information that can be detected by the check circuit at the reception side. CONSTITUTION:The control unit 6 is installed to the transfer system which transfers the information read by the card reading device 5 to the higher-rank device 12, and the conversion check circuit 7 is provided to the control unit 6. At the same time, the data converting circuit 9 as well as the figure check circuit 8 which supplies the information of the data (a) are provided to the device 5. And the error is checked through the circuit 8 in case the error information is transferred from the device 5, and then the error information is transferred to the control unit 6 after converted into the underfined data. This transferred information is checked through the circuit 7 of the conrol unit 6, and then the 8-bit data (c) is tranferred to the device 12 along with the error information (d) showing the underfined code data. Thus the alteration can be eliminated for the interface. |
