i.MX ProcessorsのトピックRe: MX7 JTAG Interface pullup/down https://community.nxp.com/t5/i-MX-Processors/MX7-JTAG-Interface-pullup-down/m-p/720402#M112012 <HTML><HEAD></HEAD><BODY><P>Hi Lars</P><P></P><P>weak resistors make signal susceptible to noise, so</P><P>based on specific board design additional pull resistors may be added</P><P>for improving board noise resistance.</P><P></P><P>Best regards<BR />igor<BR />-----------------------------------------------------------------------------------------------------------------------<BR />Note: If this post answers your question, please click the Correct Answer button. Thank you!<BR />-----------------------------------------------------------------------------------------------------------------------</P></BODY></HTML> Mon, 20 Nov 2017 23:27:15 GMT igorpadykov 2017-11-20T23:27:15Z MX7 JTAG Interface pullup/down https://community.nxp.com/t5/i-MX-Processors/MX7-JTAG-Interface-pullup-down/m-p/720401#M112011 <HTML><HEAD></HEAD><BODY><P>Hello!</P><P></P><P>The MX7 datasheet states that no external pullups/downs are required on JTAG but if desired pullups of ~10k may be used (except on TDO and MODE).<BR />The reference design ha pullups on TDS and TDI. Not on TCK. Whats the benefit of adding the pullups? And why was none added on the TCK line?</P><P></P><P>Thank you.</P></BODY></HTML> Mon, 20 Nov 2017 15:31:14 GMT https://community.nxp.com/t5/i-MX-Processors/MX7-JTAG-Interface-pullup-down/m-p/720401#M112011 demoniacmilk 2017-11-20T15:31:14Z Re: MX7 JTAG Interface pullup/down https://community.nxp.com/t5/i-MX-Processors/MX7-JTAG-Interface-pullup-down/m-p/720402#M112012 <HTML><HEAD></HEAD><BODY><P>Hi Lars</P><P></P><P>weak resistors make signal susceptible to noise, so</P><P>based on specific board design additional pull resistors may be added</P><P>for improving board noise resistance.</P><P></P><P>Best regards<BR />igor<BR />-----------------------------------------------------------------------------------------------------------------------<BR />Note: If this post answers your question, please click the Correct Answer button. Thank you!<BR />-----------------------------------------------------------------------------------------------------------------------</P></BODY></HTML> Mon, 20 Nov 2017 23:27:15 GMT https://community.nxp.com/t5/i-MX-Processors/MX7-JTAG-Interface-pullup-down/m-p/720402#M112012 igorpadykov 2017-11-20T23:27:15Z