808Chapter 18 AFCAN ControllerUser’s Manual U16580EE3V1UD00Figure 18-26: Setting transmission request (TRQ) to transmit message buffer after redefinitionCautions: 1. When a message is received, reception filtering is performed in accordance withthe ID and mask set to each receive message buffer. If the procedure in <~Refer-ence>Figure 18-38 on page 843 is not observed, the contents of the messagebuffer after it has been redefined may contradict the result of reception (result ofreception filtering). If this happens, check that the ID and IDE received first andstored in the message buffer following redefinition are those stored after the mes-sage buffer has been redefined. If no ID and IDE are stored after redefinition,redefine the message buffer again.2. When a message is transmitted, the transmission priority is checked in accor-dance with the ID, IDE, and RTR bits set to each transmit message buffer to whicha transmission request was set. The transmit message buffer having the highestpriority is selected for transmission. If the procedure in <~Reference>Figure 18-26 on page 808 is not observed, a message with an ID not having the highest pri-ority may be transmitted after redefinition.18.8.4 Transition from Initialization Mode to Operation ModeThe CAN module can be switched to the following operation modes.• Normal operation mode• Normal operation mode with ABT• Receive-only mode• Single-shot mode• Self-test modeExecutetransmission?Wait for 1 bit of CAN data.Set TRQ bitSet TRQ bit = 1Clear TRQ bit = 0YesNoRedefinition completedEND
