LPC MicrocontrollersのトピックDead LPC1768... https://community.nxp.com/t5/LPC-Microcontrollers/Dead-LPC1768/m-p/522390#M5026 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by capiman on Sat Nov 29 03:57:54 MST 2014</STRONG><BR /><SPAN>I have an old dusty KEIL MCB1760 with a LPC1768 on it. During some software experiments</SPAN><BR /><SPAN>with a new not-yet-well-known software and using JTAG/SWD from uVision V5, the LPC1768 does not answer anymore.</SPAN><BR /><SPAN>When trying to download software I get "Cannot access memory". Same when trying to erase the chip.</SPAN><BR /><BR /><SPAN>I tried to use FlashMagic/lpc21isp, but both cannot access the LPC1768. </SPAN><BR /><SPAN>FlashMagic reports problem with autobauding, lpc21isp gets no sync.</SPAN><BR /><BR /><SPAN>I already pressed INT0 button and the pressed/released RESET button, to try to come into bootloader.</SPAN><BR /><BR /><SPAN>I think there was no CRP enabled. I had flashed the same program a few times before,</SPAN><BR /><SPAN>till it was suddenly not more possible to flash.</SPAN><BR /><BR /><SPAN>I already measured voltages, used different cables, but all no success.</SPAN><BR /><BR /><SPAN>I used a oscilloskop and see RSTOUT is toggling, a small LOW signal every 1,5 ms.</SPAN><BR /><SPAN>Looks like the LPC1768 is resetting itself again and again.</SPAN><BR /><SPAN>Reset (in) is only changed when RESET button is pressed.</SPAN><BR /><SPAN>Also external 12 MHz oscillator is not running, pin 22 stays Z, pin 23 stays GND.</SPAN><BR /><BR /><SPAN>Someone an idea what can help beside exchanging the chip?</SPAN><BR /></BODY></HTML> Wed, 15 Jun 2016 17:53:59 GMT lpcware 2016-06-15T17:53:59Z Dead LPC1768... https://community.nxp.com/t5/LPC-Microcontrollers/Dead-LPC1768/m-p/522390#M5026 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by capiman on Sat Nov 29 03:57:54 MST 2014</STRONG><BR /><SPAN>I have an old dusty KEIL MCB1760 with a LPC1768 on it. During some software experiments</SPAN><BR /><SPAN>with a new not-yet-well-known software and using JTAG/SWD from uVision V5, the LPC1768 does not answer anymore.</SPAN><BR /><SPAN>When trying to download software I get "Cannot access memory". Same when trying to erase the chip.</SPAN><BR /><BR /><SPAN>I tried to use FlashMagic/lpc21isp, but both cannot access the LPC1768. </SPAN><BR /><SPAN>FlashMagic reports problem with autobauding, lpc21isp gets no sync.</SPAN><BR /><BR /><SPAN>I already pressed INT0 button and the pressed/released RESET button, to try to come into bootloader.</SPAN><BR /><BR /><SPAN>I think there was no CRP enabled. I had flashed the same program a few times before,</SPAN><BR /><SPAN>till it was suddenly not more possible to flash.</SPAN><BR /><BR /><SPAN>I already measured voltages, used different cables, but all no success.</SPAN><BR /><BR /><SPAN>I used a oscilloskop and see RSTOUT is toggling, a small LOW signal every 1,5 ms.</SPAN><BR /><SPAN>Looks like the LPC1768 is resetting itself again and again.</SPAN><BR /><SPAN>Reset (in) is only changed when RESET button is pressed.</SPAN><BR /><SPAN>Also external 12 MHz oscillator is not running, pin 22 stays Z, pin 23 stays GND.</SPAN><BR /><BR /><SPAN>Someone an idea what can help beside exchanging the chip?</SPAN><BR /></BODY></HTML> Wed, 15 Jun 2016 17:53:59 GMT https://community.nxp.com/t5/LPC-Microcontrollers/Dead-LPC1768/m-p/522390#M5026 lpcware 2016-06-15T17:53:59Z Re: Dead LPC1768... https://community.nxp.com/t5/LPC-Microcontrollers/Dead-LPC1768/m-p/522391#M5027 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by R2D2 on Sat Nov 29 05:26:56 MST 2014</STRONG><BR /><HR /><SPAN style="color: #0000ff;"><STRONG>Quote: capiman</STRONG><BR />Someone an idea what can help beside exchanging the chip?</SPAN><HR /><BR /><BR /><SPAN>If booting into ISP isn't working and your MCU isn't running some kind of bootloader you've lost it&nbsp; :(( </SPAN><BR /><BR /><SPAN>The good news: Keil boards are very robust, so changing chips isn't too dangerous&nbsp; :) </SPAN><BR /></BODY></HTML> Wed, 15 Jun 2016 17:54:00 GMT https://community.nxp.com/t5/LPC-Microcontrollers/Dead-LPC1768/m-p/522391#M5027 lpcware 2016-06-15T17:54:00Z