38.2.4 Disable Mode

Disable mode is similar to Configuration mode, except the error counters are not Reset. Disable mode is requested by setting REQOP[2:0] = 001. The CAN module will not be allowed to enter Disable mode while a transmission or reception is taking place to prevent causing errors on the CAN bus. The module will enter Disable mode when the current message completes.

The OPMODx bits indicate whether the module successfully entered Disable mode. The application software needs to use this bit field as a handshake indication for the Disable mode request. The CxTX pin will stay in the recessive state while the module is in Disable mode to prevent inadvertent CAN bus errors.