Communication device

A communication device comprising:

• a communication line;
• a master node connected to the communication line;
• and
• a slave node connected to the communication line, wherein
• the master node and the slave node communicate with each other by using a pulse width modulation signal as a line code,
• at least one of the master node or the slave node is configured to switch to either a first state in which feedback input of a bus voltage of the communication line is received to control a slew rate of the bus voltage to a desired value, and a second state in which input of a predetermined control signal is received to control the slew rate of the bus voltage to a desired value,
• the master node is configured to generate a master-side transmission signal that varies in logic level between a dominant level and a recessive level and transmit the master-side transmission signal to the slave node via the communication line,
• the slave node is configured to generate a slave-side transfer signal that varies in logic level between a dominant level and a recessive level and transmit the slave-side transfer signal to the master node via the communication line,
• in a case where the master-side transmission signal and the slave-side transfer signal collide in the communication line, whichever of the master-side transmission signal and the slave-side transfer signal that maintains the dominant level for longer is transmitted with priority,
• the slave node switches to the second state at a first timing at which the logic level of the slave-side transfer signal switches from the recessive level to the dominant level, and
• the master node switches to the second state at a second timing at which the logic level of the master-side transmission signal switches when the slave node sets the slave-side transfer signal to the dominant level.