A Controller Area Network, CAN, node comprising - a transceiver circuit for communicating data over a CAN bus, the CAN-bus having at least a first and a second bus line (CANL, CANH), the circuit comprising: - a data input port for receiving a signal to be transmitted over the CAN-bus; - a data output port for providing a signal received from the CAN-bus; - a CAN-bus transceiver unit having a receive data output port for providing data received from the CAN-bus, and a transmit data input port for receiving data to be transmitted to the CAN-bus; - a control input port adapted for receiving a control signal indicative of whether transmission of data from this transceiver circuit to the CAN-bus is allowed or prohibited; - a filter circuit for providing a filtered control signal; - logic circuitry adapted for configuring the CAN-bus transceiver unit in receive mode based on the filtered control signal, asynchronous with respect to communication on the CAN-bus, thereby preventing the circuit from transmitting data to the CAN-bus, and - a controller adapted for generating data and having an input port connected to the data output port of the transceiver circuit for receiving data from the CAN-bus, and havind an output port connected to the data input port of the transceiver circuit for transmitting the generated data to the CAN-bus, characterized in that the filter circuit is adapted for filtering the control signal received on the control input port, and in that the controller comprises - a state machine for generating the data to be transmitted via the output port and for processing data received via said input port; and - a monitoring unit for monitoring the data transmitted by the state machine, and for providing the control signal for selectively allowing or preventing the generated data to be transmitted to the CAN-bus. - a transceiver circuit for communicating data over a CAN bus, the CAN-bus having at least a first and a second bus line (CANL, CANH), the circuit comprising: - a data input port for receiving a signal to be transmitted over the CAN-bus; - a data output port for providing a signal received from the CAN-bus; - a CAN-bus transceiver unit having a receive data output port for providing data received from the CAN-bus, and a transmit data input port for receiving data to be transmitted to the CAN-bus; - a control input port adapted for receiving a control signal indicative of whether transmission of data from this transceiver circuit to the CAN-bus is allowed or prohibited; - a filter circuit for providing a filtered control signal; - logic circuitry adapted for configuring the CAN-bus transceiver unit in receive mode based on the filtered control signal, asynchronous with respect to communication on the CAN-bus, thereby preventing the circuit from transmitting data to the CAN-bus, and - a controller adapted for generating data and having an input port connected to the data output port of the transceiver circuit for receiving data from the CAN-bus, and havind an output port connected to the data input port of the transceiver circuit for transmitting the generated data to the CAN-bus, - a data input port for receiving a signal to be transmitted over the CAN-bus; - a data output port for providing a signal received from the CAN-bus; - a CAN-bus transceiver unit having a receive data output port for providing data received from the CAN-bus, and a transmit data input port for receiving data to be transmitted to the CAN-bus; - a control input port adapted for receiving a control signal indicative of whether transmission of data from this transceiver circuit to the CAN-bus is allowed or prohibited; - a filter circuit for providing a filtered control signal; - logic circuitry adapted for configuring the CAN-bus transceiver unit in receive mode based on the filtered control signal, asynchronous with respect to communication on the CAN-bus, thereby preventing the circuit from transmitting data to the CAN-bus, and - a controller adapted for generating data and having an input port connected to the data output port of the transceiver circuit for receiving data from the CAN-bus, and havind an output port connected to the data input port of the transceiver circuit for transmitting the generated data to the CAN-bus, - a state machine for generating the data to be transmitted via the output port and for processing data received via said input port; and - a monitoring unit for monitoring the data transmitted by the state machine, and for providing the control signal for selectively allowing or preventing the generated data to be transmitted to the CAN-bus.