Transition From Initialization Mode To Operation Mode; Figure 18-26: Setting Transmission Request (Trq) To Transmit Message Buffer After Redefinition - NEC V850E/PH2 User Manual

Figure 18-26: Setting transmission request (TRQ) to transmit message buffer after redefinition

Cautions: 1. When a message is received, reception filtering is performed in accordance with
the 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 message
buffer after it has been redefined may contradict the result of reception (result of
reception filtering). If this happens, check that the ID and IDE received first and
stored 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 which
a transmission request was set. The transmit message buffer having the highest
priority 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 Mode

The 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 mode
808
Chapter 18 AFCAN Controller
Redefinition completed
Execute
transmission?
Yes
Wait for 1 bit of CAN data.
Set TRQ bit
Set TRQ bit = 1
Clear TRQ bit = 0
END
User's Manual U16580EE3V1UD00
No