请问，发生Synchronous External Abort可能是什么原因导致？

查下你的芯片手册和处理器手册吧，看有没有建议的操作。感觉软件问题比较多啊，估计得用单步操作之类的一步一步调试了。先查查TCM ECC error的问题吧，查一下是那个类型的error。可参考Handling TCM ECC errors，

When a fatal error, that is, a 2-bit ECC error, is detected on a TCM read, an error is generated. Instruction and data reads generate the appropriate type of precise abort, and the AXI-slave interface returns a SLVERR response to the AXI system.

When a correctable error, that is, a 1-bit ECC error, is detected on a TCM read made by the AXI-slave interface, the processor corrects the data inline before returning to the system.

如果你软件的BTCM ECC error和sync external abort有关系的话，为何等到初始化后操作FLASH的时候才产生这个abort，如果有关应该同时产生吧。另外，你操作FLASH的时候，MPU还是禁止的么？

查下你的芯片手册和处理器手册吧，看有没有建议的操作。感觉软件问题比较多啊，估计得用单步操作之类的一步一步调试了。先查查TCM ECC error的问题吧，查一下是那个类型的error。可参考Handling TCM ECC errors，

When a fatal error, that is, a 2-bit ECC error, is detected on a TCM read, an error is generated. Instruction and data reads generate the appropriate type of precise abort, and the AXI-slave interface returns a SLVERR response to the AXI system.

When a correctable error, that is, a 1-bit ECC error, is detected on a TCM read made by the AXI-slave interface, the processor corrects the data inline before returning to the system.

如果你软件的BTCM ECC error和sync external abort有关系的话，为何等到初始化后操作FLASH的时候才产生这个abort，如果有关应该同时产生吧。另外，你操作FLASH的时候，MPU还是禁止的么？