topic USB_VBUS and ADC0_IN[4] - LPC178x in LPCXpresso IDE https://community.nxp.com/t5/LPCXpresso-IDE/USB-VBUS-and-ADC0-IN-4-LPC178x/m-p/592456#M30004 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by graynomad on Wed Sep 14 08:10:56 MST 2011</STRONG><BR /><SPAN>I'm designing a board based on the LPC178x, I need USB and all ADC inputs but there seems to be a clash between USB_VBUS and ADC0_IN[4] and neither can be moved to another pin.</SPAN><BR /><BR /><SPAN>Searching the web I cannot get a definitive answer as whether there is a work around or indeed if VBUS is really needed.</SPAN><BR /><BR /><SPAN>The manual says</SPAN><BR /><BR /><HR /><SPAN style="color: #0000ff;"><STRONG>Quote: </STRONG><BR />USB_VBUS &amp;#8212; Monitors the presence of USB bus power.<BR />This signal must be HIGH for USB reset to occur.</SPAN><HR /><BR /><BR /><SPAN>Does this mean that once the chip (and USB) is booted I can use that pin for my ADC?</SPAN><BR /><BR /><SPAN>I can't believe they would assign two important functions to the pin. </SPAN><BR /><BR /><SPAN>______</SPAN><BR /><SPAN>Rob</SPAN></BODY></HTML> Wed, 15 Jun 2016 21:30:44 GMT lpcware 2016-06-15T21:30:44Z USB_VBUS and ADC0_IN[4] - LPC178x https://community.nxp.com/t5/LPCXpresso-IDE/USB-VBUS-and-ADC0-IN-4-LPC178x/m-p/592456#M30004 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by graynomad on Wed Sep 14 08:10:56 MST 2011</STRONG><BR /><SPAN>I'm designing a board based on the LPC178x, I need USB and all ADC inputs but there seems to be a clash between USB_VBUS and ADC0_IN[4] and neither can be moved to another pin.</SPAN><BR /><BR /><SPAN>Searching the web I cannot get a definitive answer as whether there is a work around or indeed if VBUS is really needed.</SPAN><BR /><BR /><SPAN>The manual says</SPAN><BR /><BR /><HR /><SPAN style="color: #0000ff;"><STRONG>Quote: </STRONG><BR />USB_VBUS &amp;#8212; Monitors the presence of USB bus power.<BR />This signal must be HIGH for USB reset to occur.</SPAN><HR /><BR /><BR /><SPAN>Does this mean that once the chip (and USB) is booted I can use that pin for my ADC?</SPAN><BR /><BR /><SPAN>I can't believe they would assign two important functions to the pin. </SPAN><BR /><BR /><SPAN>______</SPAN><BR /><SPAN>Rob</SPAN></BODY></HTML> Wed, 15 Jun 2016 21:30:44 GMT https://community.nxp.com/t5/LPCXpresso-IDE/USB-VBUS-and-ADC0-IN-4-LPC178x/m-p/592456#M30004 lpcware 2016-06-15T21:30:44Z