Transmission apparatus and transmission method

A transmission apparatus comprising:

• a logic circuit for performing a predetermined process, and outputting a logic output signal depending on the process;
• an open-drain signal generation circuit, connectable at an input terminal to the logic circuit and at an output terminal to a pull-up resistor, for outputting an output signal representing “0” when the logic output signal representing “0” is inputted into the input terminal from the logic circuit, and outputting Hi-Z when the logic output signal representing “1” is inputted into the input terminal from the logic circuit;
• and
• a transmission path failure determination circuit for determining whether there is a failure in a transmission path which transmits a signal outputted from the logic circuit via the open-drain signal generation circuit, wherein
• the transmission path failure determination circuit includes
• an edge waveform information obtaining circuit for obtaining edge waveform information indicating a waveform of at least one of a rising edge and a falling edge of an application signal which is applied to the output terminal of the open-drain signal generation circuit, and
• a failure determination circuit for determining whether the edge waveform information satisfies a predetermined condition, and outputting a failure signal indicating that there is a failure in the transmission path when determining that the edge waveform information does not satisfy the predetermined condition.