Tool/software:
Hi TI team,
In our test code, the MCU sends a frame of message through TCAN4550 every 200ms, and after about several tens of seconds, the nINT of TCAN4550 will remain in a low level state. After the occurrence of the previous situation, TCAN4550 will definitely be unable to notify the MCU to start receiving packets through nINT. At the beginning of discovering the anomaly, I went to read the relevant registers and found that all bits of register 0x0820 and register 0x1050 were set to 1(See belowed register value). Then I cleared the related interrupts through TCAN4x5x_Device_ClearSPIERR() and TCAN4x5x_MCAN_ClearInterupts(), but the nINT pin was still low. By the way, I would like to mention that although TCAN4550 cannot receive packets after an exception occurs, the MCU can still send packets normally every 200ms through TCAN4550.