https://community.nxp.com/t5/LPC-Microcontrollers/TDO-interfere-with-PIO0-8-even-if-JTAG-is-not-used/m-p/964600#M38185 <HTML><HEAD></HEAD><BODY><P>Hi Bruno,</P><P>&nbsp;</P><P>Thank you for your input and work-around.</P><P>&nbsp;</P><P>Have a great day,</P><P>Felipe</P></BODY></HTML> Tue, 24 Sep 2019 20:22:04 GMT FelipeGarcia 2019-09-24T20:22:04Z https://community.nxp.com/t5/LPC-Microcontrollers/TDO-interfere-with-PIO0-8-even-if-JTAG-is-not-used/m-p/964599#M38184 <HTML><HEAD></HEAD><BODY><P>Did anyone experience the following behaviour?</P><P></P><P>TDO seems to interfere with PIO0_8 even if JTAG is not configured.</P><P>In certain conditions TDO take control of PIO0_8.</P><P>The conditions are not yet clear but probably tied to one particulat input pin at reset. <BR />Verified in two out of three projects. PIO0_8 always holds to zero and cannot be changed to input or driven to one.</P><P>All the projects use LPC1519JBD100.</P><P></P><P>Work-around:</P><P>SWO (SWD trace output) should always be assigned in order to free PIO0_8.</P></BODY></HTML> Tue, 24 Sep 2019 13:21:18 GMT https://community.nxp.com/t5/LPC-Microcontrollers/TDO-interfere-with-PIO0-8-even-if-JTAG-is-not-used/m-p/964599#M38184 brunog 2019-09-24T13:21:18Z https://community.nxp.com/t5/LPC-Microcontrollers/TDO-interfere-with-PIO0-8-even-if-JTAG-is-not-used/m-p/964600#M38185 <HTML><HEAD></HEAD><BODY><P>Hi Bruno,</P><P>&nbsp;</P><P>Thank you for your input and work-around.</P><P>&nbsp;</P><P>Have a great day,</P><P>Felipe</P></BODY></HTML> Tue, 24 Sep 2019 20:22:04 GMT https://community.nxp.com/t5/LPC-Microcontrollers/TDO-interfere-with-PIO0-8-even-if-JTAG-is-not-used/m-p/964600#M38185 FelipeGarcia 2019-09-24T20:22:04Z