SPRUJ52C june 2022 – july 2023 AM69 , AM69A , TDA4AH-Q1 , TDA4AP-Q1 , TDA4VH-Q1 , TDA4VP-Q1
The MCAN module can be set into Internal Loopback Mode by programming MCAN_TEST[4] LBCK and MCAN_CCCR[5] MON bits to 1. The Internal Loopback Mode is used for a 'Hot Selftest'. The 'Hot Selftest' allows the MCAN module to be tested without affecting a running CAN system connected to the TX and RX pins. In this mode RX pin is disconnected from the MCAN module and TX pin is held recessive. Figure 12-315 shows the connection of the TX and RX pins to the MCAN module in case of Internal Loopback Mode.