Other NXP ProductsのトピックSC16IS752IPW Reset https://community.nxp.com/t5/Other-NXP-Products/SC16IS752IPW-Reset/m-p/627640#M4195 <HTML><HEAD></HEAD><BODY><P>Hello together,</P><P></P><P>I use the SC16IS752IPW 16 times on a big PCB.</P><P>Since I made a new revision of the PCB the SC16IS752IPW allways looses its setting (makes a reset) after switching a relais near the chip. The astonishing thing is, that between the revision bevor and the actual one I din't change anything around the Relais or the&nbsp; SC16IS752IPW.</P><P>Measuring the souroundings of the chip I get a ripple at the 3.3V supply voltage (400mVpp for 1us) at the Reset input (1Vpp for 100ns) and at the I²S Data/Clock (1Vpp for 100ns) while switching the Reliais. Can this be the reason for the reset of the chip?</P><P></P><P>Best regards</P><P>Michael Pfab</P><H1></H1></BODY></HTML> Mon, 28 Nov 2016 11:00:12 GMT Pudl 2016-11-28T11:00:12Z SC16IS752IPW Reset https://community.nxp.com/t5/Other-NXP-Products/SC16IS752IPW-Reset/m-p/627640#M4195 <HTML><HEAD></HEAD><BODY><P>Hello together,</P><P></P><P>I use the SC16IS752IPW 16 times on a big PCB.</P><P>Since I made a new revision of the PCB the SC16IS752IPW allways looses its setting (makes a reset) after switching a relais near the chip. The astonishing thing is, that between the revision bevor and the actual one I din't change anything around the Relais or the&nbsp; SC16IS752IPW.</P><P>Measuring the souroundings of the chip I get a ripple at the 3.3V supply voltage (400mVpp for 1us) at the Reset input (1Vpp for 100ns) and at the I²S Data/Clock (1Vpp for 100ns) while switching the Reliais. Can this be the reason for the reset of the chip?</P><P></P><P>Best regards</P><P>Michael Pfab</P><H1></H1></BODY></HTML> Mon, 28 Nov 2016 11:00:12 GMT https://community.nxp.com/t5/Other-NXP-Products/SC16IS752IPW-Reset/m-p/627640#M4195 Pudl 2016-11-28T11:00:12Z Re: SC16IS752IPW Reset https://community.nxp.com/t5/Other-NXP-Products/SC16IS752IPW-Reset/m-p/627641#M4196 <HTML><HEAD></HEAD><BODY><P>Hi Michael Pfab,</P><P></P><P>Yes, I do believe that the cause of the reset you are seen is the ripple you are seen at the Reset input.</P><P>Suggest you to add a decoupling capacitor on this rail to try to reduce the ripple.</P><P><BR />Have a great day,<BR />Jose</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, 30 Nov 2016 16:59:42 GMT https://community.nxp.com/t5/Other-NXP-Products/SC16IS752IPW-Reset/m-p/627641#M4196 reyes 2016-11-30T16:59:42Z