https://community.nxp.com/t5/8-bit-Microcontrollers/secure-byte-of-MC908QY4ACDWE/m-p/1840142#M23872 <P>Hello Technical Support Team,</P><P>I have five ICs (Freescale MC908QY4ACDWE), which are unable to access flash memory. When I use a key of 8 bytes with all FF, and read RAM address 80h, I get a value of 0x3F, which seems to be incorrect.</P><P>Could you please provide the default factory key value? Are there any other available key values?</P> Wed, 03 Apr 2024 09:55:36 GMT trevorlin 2024-04-03T09:55:36Z https://community.nxp.com/t5/8-bit-Microcontrollers/secure-byte-of-MC908QY4ACDWE/m-p/1840142#M23872 <P>Hello Technical Support Team,</P><P>I have five ICs (Freescale MC908QY4ACDWE), which are unable to access flash memory. When I use a key of 8 bytes with all FF, and read RAM address 80h, I get a value of 0x3F, which seems to be incorrect.</P><P>Could you please provide the default factory key value? Are there any other available key values?</P> Wed, 03 Apr 2024 09:55:36 GMT https://community.nxp.com/t5/8-bit-Microcontrollers/secure-byte-of-MC908QY4ACDWE/m-p/1840142#M23872 trevorlin 2024-04-03T09:55:36Z https://community.nxp.com/t5/8-bit-Microcontrollers/secure-byte-of-MC908QY4ACDWE/m-p/1849233#M23885 I see that this request is related to a support ticket that was submited by your Sales contact Kelvin Lee at AVNET, right?<BR />We'll continue the troubleshooting through that support case to speed up the process. Therefore, please keep in touch with him.<BR /><BR />Thanks for your patience!<BR /><BR />NOTE: Once we complete the troubleshooting and find the root cause of the error I'll also post the final solution in this post as well Wed, 17 Apr 2024 17:54:32 GMT https://community.nxp.com/t5/8-bit-Microcontrollers/secure-byte-of-MC908QY4ACDWE/m-p/1849233#M23885 Itzzamna_Supp 2024-04-17T17:54:32Z