topic How to erase the original program  0f  mc9s08？？ in 8-bit Microcontrollers https://community.nxp.com/t5/8-bit-Microcontrollers/How-to-erase-the-original-program-0f-mc9s08/m-p/401316#M21344 <HTML><HEAD></HEAD><BODY><P>The following pictures are happened when burned the program</P></BODY></HTML> Mon, 13 Apr 2015 06:02:44 GMT 秀娟林 2015-04-13T06:02:44Z How to erase the original program  0f  mc9s08？？ https://community.nxp.com/t5/8-bit-Microcontrollers/How-to-erase-the-original-program-0f-mc9s08/m-p/401316#M21344 <HTML><HEAD></HEAD><BODY><P>The following pictures are happened when burned the program</P></BODY></HTML> Mon, 13 Apr 2015 06:02:44 GMT https://community.nxp.com/t5/8-bit-Microcontrollers/How-to-erase-the-original-program-0f-mc9s08/m-p/401316#M21344 秀娟林 2015-04-13T06:02:44Z Re: How to erase the original program 0f mc9s08？？ https://community.nxp.com/t5/8-bit-Microcontrollers/How-to-erase-the-original-program-0f-mc9s08/m-p/401317#M21345 <HTML><HEAD></HEAD><BODY><P>Hello,</P><P></P><P>Please be aware that your device could be <STRONG>secured</STRONG> or the <STRONG>device clock is wrong</STRONG>. </P><P></P><P style="text-align: justify;">The MC9S08 Series include circuitry to prevent unauthorized access to the contents of flash and RAM memory. When security is engaged, flash and RAM are considered secure resources. Direct-page registers, high-page registers, and the background debug controller are considered unsecured resources.</P><P style="text-align: justify;"></P><P style="text-align: justify;">In order to unsecure your device, please refer to the Chapter 4.6.5.1, page 87, from the Reference Manual from the following link:</P><P style="text-align: justify;"><A href="http://www.freescale.com/files/microcontrollers/doc/ref_manual/MC9S08QE128RM.pdf"><SPAN style="color: windowtext;"></SPAN></A><A href="http://www.freescale.com/files/microcontrollers/doc/ref_manual/MC9S08QE128RM.pdf" target="test_blank">http://www.freescale.com/files/microcontrollers/doc/ref_manual/MC9S08QE128RM.pdf</A></P><P></P><P style="text-align: justify;">At last, I strongly recommend you check the device clock. If the clock is wrong then communication is impossible.</P><P style="margin-bottom: .0001pt;"></P><P style="margin-bottom: .0001pt;">Hope this information will be useful for you.</P><P style="margin-bottom: .0001pt;">Have a great day.</P><P></P><P style="margin-bottom: .0001pt;">Best Regards, :smileyhappy:</P><P style="margin-bottom: .0001pt;">David Diaz.</P><P style="margin-bottom: .0001pt;">-----------------------------------------------------------------------------------------------------------------------</P><P style="margin-bottom: .0001pt;">Note: If this post answers your question, please click the Correct Answer button. Thank you!</P><P style="margin-bottom: .0001pt;">-----------------------------------------------------------------------------------------------------------------------</P></BODY></HTML> Mon, 13 Apr 2015 15:47:14 GMT https://community.nxp.com/t5/8-bit-Microcontrollers/How-to-erase-the-original-program-0f-mc9s08/m-p/401317#M21345 david_diaz 2015-04-13T15:47:14Z