https://community.nxp.com/t5/Kinetis-Microcontrollers/KEAZ64-Disable-NMI/m-p/1467134#M63206 <P>could i disable the NMI interrupt&nbsp; <SPAN class="">after system reset</SPAN>&nbsp;，before into the main function.</P><P>like change the flash data or something else.</P><P>thanks.</P> Wed, 01 Jun 2022 03:47:11 GMT 1915135412 2022-06-01T03:47:11Z https://community.nxp.com/t5/Kinetis-Microcontrollers/KEAZ64-Disable-NMI/m-p/1467134#M63206 <P>could i disable the NMI interrupt&nbsp; <SPAN class="">after system reset</SPAN>&nbsp;，before into the main function.</P><P>like change the flash data or something else.</P><P>thanks.</P> Wed, 01 Jun 2022 03:47:11 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/KEAZ64-Disable-NMI/m-p/1467134#M63206 1915135412 2022-06-01T03:47:11Z https://community.nxp.com/t5/Kinetis-Microcontrollers/KEAZ64-Disable-NMI/m-p/1467455#M63212 <P>By definition Non Maskable Interrupts can not be disabled at run time.<BR /><BR />Many parts do have a Flash configuration option byte that will either disable NMI completely before executing code or turn it into an alternative function such as enabling the bootloader.<BR /><BR />Regardless of that, any NMI pin must not be asserted at reset or allowed to float.<BR />There can be timing races in some parts that cause the NMI to happen before anything else.<BR /><BR /><BR /></P> Wed, 01 Jun 2022 12:16:49 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/KEAZ64-Disable-NMI/m-p/1467455#M63212 bobpaddock 2022-06-01T12:16:49Z