SPRUIE9D May 2017 – May 2024 DRA74P , DRA75P , DRA76P , DRA77P
The silent mode may be used to analyze the traffic on the CAN bus without affecting it by sending dominant bits (e.g., acknowledge bit, overload flag, active error flag). The DCAN is still able to receive valid data frames and valid remote frames, but it will not send any dominant bits. However, these are internally routed to the CAN core.
Figure 26-182 shows the connection of signals CAN_TX and CAN_RX to the CAN core in silent mode. Silent mode can be activated by setting the DCAN_TEST[3] SILENT bit to 1. In ISO 11898-1, the silent mode is called the bus monitoring mode.