Other Parts Discussed in Thread: TPIC7218
As can be seen from the figure, the MCU assigns "7C" to the 0x1B register of the 7218 chip, and the 7218 chip returns the register address "1B" normally.
It can be seen from the figure that when the MCU assigns "00" and "7C" to the 0x10 and 0x1B registers of the 7218 chip, the 7218 chip does not return the register address "10" or "1B" normally, that is, the data is not normally written. The ECU's alarm cause type is related to the value of the "0x1B" control register.