SPRUIE9D May 2017 – May 2024 DRA74P , DRA75P , DRA76P , DRA77P
It is also possible to combine loopback mode and silent mode by setting bits DCAN_TEST[4] LBACK and [3] SILENT at the same time. This mode can be used for a "Hot Selftest", that is, the DCAN hardware can be tested without affecting the CAN network. In this mode, the CAN_RX pin is disconnected from the CAN core and no dominant bits will be sent on the CAN_TX pin.
Figure 26-185 shows the connection of the signals CAN_TX and CAN_RX to the CAN core in case of the combination of loopback mode with silent mode.