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TMS320F2812: The XINT13 interrupt of TMS320F2812

Part Number: TMS320F2812

     When using the XINT13 interrupt of TMS320F2812, how to properly close it? The problem I am currently facing is that because it cannot be masked and reused with XNMI, it is not completely closed. As long as there is an external signal, even if the interrupt is closed using software, it can still continuously respond to the interrupt signal. I have already disabled XNMI, but it still work。Looking forward to your reply。