topic problem in debug mc9s12dg256c using P&E USB Multilink BDM! in S12 / MagniV Microcontrollers https://community.nxp.com/t5/S12-MagniV-Microcontrollers/problem-in-debug-mc9s12dg256c-using-P-E-USB-Multilink-BDM/m-p/188505#M7216 <HTML><HEAD></HEAD><BODY><DIV>hi all</DIV><DIV>&nbsp;&nbsp;&nbsp; i have a problem in debug mc9s12dg256c using&nbsp;P&amp;E USB&nbsp;Multilink BDM. in program, i did nothing initialization to mc9s12dg256c system clock (all register value are reset values) and interrupt is diabled (//EnableInterrupts<A href="http://freescale.i.lithium.com/i/smilies/16x16_smiley-wink.gif"><IMG alt=":smileywink:" class="emoticon emoticon-smileywink" src="http://freescale.i.lithium.com/i/smilies/16x16_smiley-wink.gif" title="Smiley Wink" /></A>, after i download the program to the target, it can run correctly using BDM, but when not using bdm, the program can not run.</DIV><DIV>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; thanks for help!</DIV></BODY></HTML> Fri, 26 Sep 2008 08:09:01 GMT jeffzxg 2008-09-26T08:09:01Z problem in debug mc9s12dg256c using P&E USB Multilink BDM! https://community.nxp.com/t5/S12-MagniV-Microcontrollers/problem-in-debug-mc9s12dg256c-using-P-E-USB-Multilink-BDM/m-p/188505#M7216 <HTML><HEAD></HEAD><BODY><DIV>hi all</DIV><DIV>&nbsp;&nbsp;&nbsp; i have a problem in debug mc9s12dg256c using&nbsp;P&amp;E USB&nbsp;Multilink BDM. in program, i did nothing initialization to mc9s12dg256c system clock (all register value are reset values) and interrupt is diabled (//EnableInterrupts<A href="http://freescale.i.lithium.com/i/smilies/16x16_smiley-wink.gif"><IMG alt=":smileywink:" class="emoticon emoticon-smileywink" src="http://freescale.i.lithium.com/i/smilies/16x16_smiley-wink.gif" title="Smiley Wink" /></A>, after i download the program to the target, it can run correctly using BDM, but when not using bdm, the program can not run.</DIV><DIV>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; thanks for help!</DIV></BODY></HTML> Fri, 26 Sep 2008 08:09:01 GMT https://community.nxp.com/t5/S12-MagniV-Microcontrollers/problem-in-debug-mc9s12dg256c-using-P-E-USB-Multilink-BDM/m-p/188505#M7216 jeffzxg 2008-09-26T08:09:01Z Re: problem in debug mc9s12dg256c using P&E USB Multilink BDM! https://community.nxp.com/t5/S12-MagniV-Microcontrollers/problem-in-debug-mc9s12dg256c-using-P-E-USB-Multilink-BDM/m-p/188506#M7217 <HTML><HEAD></HEAD><BODY><DIV>Sounds like a famous "write-once" issue. In normal mode some registers are write once, while the same registers in special modes (debugging with BDM connected) are write many times registers. Forum search gives this:</DIV><DIV>&nbsp;</DIV><DIV><A href="http://forums.freescale.com/freescale/search?board_id=16BITCOMM&amp;submitted=true&amp;q=write+once" target="_blank">http://forums.freescale.com/freescale/search?board_id=16BITCOMM&amp;submitted=true&amp;q=write+once</A></DIV></BODY></HTML> Fri, 26 Sep 2008 10:58:47 GMT https://community.nxp.com/t5/S12-MagniV-Microcontrollers/problem-in-debug-mc9s12dg256c-using-P-E-USB-Multilink-BDM/m-p/188506#M7217 kef 2008-09-26T10:58:47Z