Infineon Technologies TC1728 User Manual page 1330

The message object that is qualified for transmission and has highest transmit priority
wins the transmit acceptance filtering, and will be transmitted first. All other message
objects lose the current transmit acceptance filtering round. They get a new chance in
subsequent acceptance filtering rounds.
MSGVAL
TXRQ
TXEN0
TXEN1
Figure 20-15 Effective Transmit Request of Message Object
User's Manual
MultiCAN, V2.24
Controller Area Network Controller (MultiCAN)
&
0 = Object will not be transmitted
1 = Object is requested for transmission
20-37
TC1728
MCA06272
V1.0, 2011-12