S12 / MagniV MicrocontrollersのトピックS12G Flash Secure https://community.nxp.com/t5/S12-MagniV-Microcontrollers/S12G-Flash-Secure/m-p/1059753#M17229 <HTML><HEAD></HEAD><BODY><P>Target MCU: MC9S12G128&nbsp;</P><P>Hi gays. I was&nbsp; trying to set up a bootloader with AN4258 and I want the p-Flash secured. So I intened to set value of @0xFF0F to 0xFF.</P><P>But after the s19 file downloaded to the mcu with USBDM. The value @0x0xFF0F&nbsp;could be viewed and it is&nbsp;0xFE, not 0xFF.<SPAN>&nbsp;</SPAN>In fact,<SPAN>&nbsp;</SPAN>all the data in the flash could be&nbsp;viewed. What did I miss?</P><P></P><P>Below is what I did.</P><P></P><P>I modified an element of const array flash_array as shown in below pic.</P><P><span class="lia-inline-image-display-wrapper" image-alt="pastedImage_2.png"><img src="https://community.nxp.com/t5/image/serverpage/image-id/101388i0A3803FB2D2C63CE/image-size/large?v=v2&amp;px=999" role="button" title="pastedImage_2.png" alt="pastedImage_2.png" /></span></P><P>When mcu connected to the USBDM, here we saw<span class="lia-inline-image-display-wrapper" image-alt="pastedImage_3.png"><img src="https://community.nxp.com/t5/image/serverpage/image-id/104066i19AB509168FE30A4/image-size/large?v=v2&amp;px=999" role="button" title="pastedImage_3.png" alt="pastedImage_3.png" /></span></P><P></P><P></P><P>And if I modified the last element to 0x0F, we will get a ox0E in the memory. It's not secured.&nbsp;</P></BODY></HTML> Sat, 04 Apr 2020 08:56:35 GMT bloom_you 2020-04-04T08:56:35Z S12G Flash Secure https://community.nxp.com/t5/S12-MagniV-Microcontrollers/S12G-Flash-Secure/m-p/1059753#M17229 <HTML><HEAD></HEAD><BODY><P>Target MCU: MC9S12G128&nbsp;</P><P>Hi gays. I was&nbsp; trying to set up a bootloader with AN4258 and I want the p-Flash secured. So I intened to set value of @0xFF0F to 0xFF.</P><P>But after the s19 file downloaded to the mcu with USBDM. The value @0x0xFF0F&nbsp;could be viewed and it is&nbsp;0xFE, not 0xFF.<SPAN>&nbsp;</SPAN>In fact,<SPAN>&nbsp;</SPAN>all the data in the flash could be&nbsp;viewed. What did I miss?</P><P></P><P>Below is what I did.</P><P></P><P>I modified an element of const array flash_array as shown in below pic.</P><P><span class="lia-inline-image-display-wrapper" image-alt="pastedImage_2.png"><img src="https://community.nxp.com/t5/image/serverpage/image-id/101388i0A3803FB2D2C63CE/image-size/large?v=v2&amp;px=999" role="button" title="pastedImage_2.png" alt="pastedImage_2.png" /></span></P><P>When mcu connected to the USBDM, here we saw<span class="lia-inline-image-display-wrapper" image-alt="pastedImage_3.png"><img src="https://community.nxp.com/t5/image/serverpage/image-id/104066i19AB509168FE30A4/image-size/large?v=v2&amp;px=999" role="button" title="pastedImage_3.png" alt="pastedImage_3.png" /></span></P><P></P><P></P><P>And if I modified the last element to 0x0F, we will get a ox0E in the memory. It's not secured.&nbsp;</P></BODY></HTML> Sat, 04 Apr 2020 08:56:35 GMT https://community.nxp.com/t5/S12-MagniV-Microcontrollers/S12G-Flash-Secure/m-p/1059753#M17229 bloom_you 2020-04-04T08:56:35Z Re: S12G Flash Secure https://community.nxp.com/t5/S12-MagniV-Microcontrollers/S12G-Flash-Secure/m-p/1059754#M17230 <HTML><HEAD></HEAD><BODY><P>A couple days ago, I got a reply through the email.And my problem was precisly pointed out. It's the "FLASH NOUNSECURE" problem. I put it to the wrong place.</P><P>Strange thing is that the reply and email is dispeared. And I think this is not the first time that this kind of things happened.&nbsp;</P><P>I want to thank the one who responsed to my question. Thank you, whoever you are.</P></BODY></HTML> Fri, 10 Apr 2020 10:31:02 GMT https://community.nxp.com/t5/S12-MagniV-Microcontrollers/S12G-Flash-Secure/m-p/1059754#M17230 bloom_you 2020-04-10T10:31:02Z