https://community.nxp.com/t5/i-MX-Processors/imxrt1062-JTAG-MOD-Pin-Unconnected/m-p/2298606#M243570 <P>Hi&nbsp;<a href="https://community.nxp.com/t5/user/viewprofilepage/user-id/259074">@cboschert</a>,</P> <P>As mentioned on the following community post (<A href="https://community.nxp.com/t5/i-MX-Processors/JTAG-MOD-Pull-Down-Resistor-Requirements-for-MX-RT1010/td-p/1643976" target="_blank">Solved: JTAG_MOD Pull Down Resistor Requirements for MX RT1010 - NXP Community</A>) the JTAG_MOD pin is the base to determine the mode for JTAG functionality. By using a strong pull-down connection to ground, we ensure consistency even across noisy environments, and therefore we can assure the JTAG capabilities will function as expected. If a weak pull-down were to be used instead, there is much higher probability that noise might affect the JTAG_MOD pin and cause unexpected behavior on the JTAG functionality as a whole.</P> <P>BR,<BR />Edwin.</P> Thu, 22 Jan 2026 23:59:21 GMT EdwinHz 2026-01-22T23:59:21Z https://community.nxp.com/t5/i-MX-Processors/imxrt1062-JTAG-MOD-Pin-Unconnected/m-p/2298443#M243559 <P>Hello,</P><P>We designed a board leaving the JTAG_MOD pin unconnected. We are just using SWDIO/SWCLK to interface with the IC. We missed the JTAG_MOD pin in design. We should have connected it directly to ground, but the PCBs have already been ordered. Does the JTAG pin need a strong pull-down connection to ground, or can the weak 100K pull down suffice?&nbsp;<BR /><BR /></P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="cboschert_0-1769095784752.png" style="width: 400px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/373951iECC6A47D26B59C8A/image-size/medium?v=v2&amp;px=400" role="button" title="cboschert_0-1769095784752.png" alt="cboschert_0-1769095784752.png" /></span></P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="cboschert_1-1769095801962.png" style="width: 400px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/373952i683E48AE5870CB2D/image-size/medium?v=v2&amp;px=400" role="button" title="cboschert_1-1769095801962.png" alt="cboschert_1-1769095801962.png" /></span></P><P>&nbsp;</P><P>&nbsp;</P> Thu, 22 Jan 2026 15:31:35 GMT https://community.nxp.com/t5/i-MX-Processors/imxrt1062-JTAG-MOD-Pin-Unconnected/m-p/2298443#M243559 cboschert 2026-01-22T15:31:35Z https://community.nxp.com/t5/i-MX-Processors/imxrt1062-JTAG-MOD-Pin-Unconnected/m-p/2298606#M243570 <P>Hi&nbsp;<a href="https://community.nxp.com/t5/user/viewprofilepage/user-id/259074">@cboschert</a>,</P> <P>As mentioned on the following community post (<A href="https://community.nxp.com/t5/i-MX-Processors/JTAG-MOD-Pull-Down-Resistor-Requirements-for-MX-RT1010/td-p/1643976" target="_blank">Solved: JTAG_MOD Pull Down Resistor Requirements for MX RT1010 - NXP Community</A>) the JTAG_MOD pin is the base to determine the mode for JTAG functionality. By using a strong pull-down connection to ground, we ensure consistency even across noisy environments, and therefore we can assure the JTAG capabilities will function as expected. If a weak pull-down were to be used instead, there is much higher probability that noise might affect the JTAG_MOD pin and cause unexpected behavior on the JTAG functionality as a whole.</P> <P>BR,<BR />Edwin.</P> Thu, 22 Jan 2026 23:59:21 GMT https://community.nxp.com/t5/i-MX-Processors/imxrt1062-JTAG-MOD-Pin-Unconnected/m-p/2298606#M243570 EdwinHz 2026-01-22T23:59:21Z