topic Re: How I can disconnect OpenSDA debug module on FRDM-KL05Z? in Kinetis Microcontrollers https://community.nxp.com/t5/Kinetis-Microcontrollers/How-I-can-disconnect-OpenSDA-debug-module-on-FRDM-KL05Z/m-p/360944#M18315 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P></P><P>I do a test with FRDM-KL05Z board, the KL05 will work with R28 removed and jumper J4 be shuttled (J5 jumper is open).</P><P>For the OpenSDA K20 chip pin6 VREGIN connects with OPENSDA USB VBUS, P3V3_USBSER will with 1.5V voltage.</P><P>I recommend customer to use external DC power supply, add 3.3v to jumper 4 and short J9-3 with J9-4.</P><P>The reason is for RST_TGTMCU pin connects with K20's pin21, which default function is ADC0_SE9.</P><P>The ADC input pin as voltage divide resistor and KL05 reset pin voltage will divide to 1.3V and KL05 will be in reset state.</P><P>So short J9-3 and J9-4 will pull up the KL05 reset pin to 3.3V and KL05 could work.</P><P></P><P>Wish it helps.</P><P><BR />Have a great day,<BR />best regards,</P><P></P><P>Ma Hui</P><P></P><P>-----------------------------------------------------------------------------------------------------------------------<BR />Note: If this post answers your question, please click the Correct Answer button. Thank you!<BR />-----------------------------------------------------------------------------------------------------------------------</P></BODY></HTML> Wed, 11 Feb 2015 02:07:12 GMT Hui_Ma 2015-02-11T02:07:12Z How I can disconnect OpenSDA debug module on FRDM-KL05Z? https://community.nxp.com/t5/Kinetis-Microcontrollers/How-I-can-disconnect-OpenSDA-debug-module-on-FRDM-KL05Z/m-p/360943#M18314 <HTML><HEAD></HEAD><BODY><P>I remove R28 to disconnect the debugging module, but the microcontroller does not work. And if I put the J5 jummper works fine.</P><P></P><P>I need to disconnect the debugging module to consume less current.</P></BODY></HTML> Mon, 09 Feb 2015 19:04:31 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/How-I-can-disconnect-OpenSDA-debug-module-on-FRDM-KL05Z/m-p/360943#M18314 OmarIsaiPinales 2015-02-09T19:04:31Z Re: How I can disconnect OpenSDA debug module on FRDM-KL05Z? https://community.nxp.com/t5/Kinetis-Microcontrollers/How-I-can-disconnect-OpenSDA-debug-module-on-FRDM-KL05Z/m-p/360944#M18315 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P></P><P>I do a test with FRDM-KL05Z board, the KL05 will work with R28 removed and jumper J4 be shuttled (J5 jumper is open).</P><P>For the OpenSDA K20 chip pin6 VREGIN connects with OPENSDA USB VBUS, P3V3_USBSER will with 1.5V voltage.</P><P>I recommend customer to use external DC power supply, add 3.3v to jumper 4 and short J9-3 with J9-4.</P><P>The reason is for RST_TGTMCU pin connects with K20's pin21, which default function is ADC0_SE9.</P><P>The ADC input pin as voltage divide resistor and KL05 reset pin voltage will divide to 1.3V and KL05 will be in reset state.</P><P>So short J9-3 and J9-4 will pull up the KL05 reset pin to 3.3V and KL05 could work.</P><P></P><P>Wish it helps.</P><P><BR />Have a great day,<BR />best regards,</P><P></P><P>Ma Hui</P><P></P><P>-----------------------------------------------------------------------------------------------------------------------<BR />Note: If this post answers your question, please click the Correct Answer button. Thank you!<BR />-----------------------------------------------------------------------------------------------------------------------</P></BODY></HTML> Wed, 11 Feb 2015 02:07:12 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/How-I-can-disconnect-OpenSDA-debug-module-on-FRDM-KL05Z/m-p/360944#M18315 Hui_Ma 2015-02-11T02:07:12Z