topic Re: !MPR084 sensitivity problem! in 8-bit Microcontrollers https://community.nxp.com/t5/8-bit-Microcontrollers/MPR084-sensitivity-problem/m-p/150421#M8069 <HTML><HEAD></HEAD><BODY><P>Change the electrode lines pull-up resistor to 1M. o<SPAN>r greater</SPAN><SPAN>&nbsp;</SPAN><SPAN>resistance value</SPAN><SPAN>.</SPAN></P></BODY></HTML> Thu, 29 Mar 2012 07:29:48 GMT Mickey 2012-03-29T07:29:48Z !MPR084 sensitivity problem! https://community.nxp.com/t5/8-bit-Microcontrollers/MPR084-sensitivity-problem/m-p/150419#M8067 <HTML><HEAD></HEAD><BODY><P><SPAN style="font-family: 'verdana, geneva';"><SPAN class="Apple-style-span">I used MPR084 with LL16 and the system power supply is 3V. When the supply fall down to 2.8V, the MPR084 is not very sensitive. Why and how to solve?</SPAN></SPAN></P><P><SPAN style="font-family: 'verdana, geneva';"><SPAN class="Apple-style-span">Thank you!&nbsp;</SPAN></SPAN></P></BODY></HTML> Fri, 30 Oct 2009 09:22:18 GMT https://community.nxp.com/t5/8-bit-Microcontrollers/MPR084-sensitivity-problem/m-p/150419#M8067 Lenzh 2009-10-30T09:22:18Z Re: !MPR084 sensitivity problem! https://community.nxp.com/t5/8-bit-Microcontrollers/MPR084-sensitivity-problem/m-p/150420#M8068 <HTML><HEAD></HEAD><BODY><P>I have a like problem!</P><P>I am developing one application of a MPR084 capacitive touch sensor with MC9S08QE8RM.<BR />But i have many problems!<BR />The project consist at the access control interface.<BR />The interface has twelve capacitive touch pads. The user enter their password in this pads.<BR />The sensor does not detect pads when i put acrylic or polycarbonate plate of 1mm.<BR />When i put the acrylic or polycarbonate plate of 1mm the detection does not occur or occurs intermittently.<BR />when adjust the sensitivity (increasing the sensitivity, in Sensitivity Threshold Registers) the error in detection occurs.<BR />Do you have a specific document for calibration of the MPR084.<BR />What should I do?</P></BODY></HTML> Thu, 29 Mar 2012 01:13:27 GMT https://community.nxp.com/t5/8-bit-Microcontrollers/MPR084-sensitivity-problem/m-p/150420#M8068 Helton 2012-03-29T01:13:27Z Re: !MPR084 sensitivity problem! https://community.nxp.com/t5/8-bit-Microcontrollers/MPR084-sensitivity-problem/m-p/150421#M8069 <HTML><HEAD></HEAD><BODY><P>Change the electrode lines pull-up resistor to 1M. o<SPAN>r greater</SPAN><SPAN>&nbsp;</SPAN><SPAN>resistance value</SPAN><SPAN>.</SPAN></P></BODY></HTML> Thu, 29 Mar 2012 07:29:48 GMT https://community.nxp.com/t5/8-bit-Microcontrollers/MPR084-sensitivity-problem/m-p/150421#M8069 Mickey 2012-03-29T07:29:48Z