In the CAN message protocol, several of the frame segments are coded through bit stuffing. Whenever a transmitter detects five consecutive bits of identical value in the bit stream to be transmitted, it automatically inserts a complementary bit into the actual transmitted bit stream. If a 6th consecutive equal bit is detected in a received segment that should have been coded by bit stuffing, the DCAN module will flag a Stuff Error. Error response and any necessary software requirements are defined by the system integrator.