Dear @Eshwar
Resistive touch screens require analog measurements - voltages are applied to particular pins and the analog voltages are read back on other pins. After applying a voltage it takes some time for the resulting voltages to settle. The required time is longer for larger screens and longer cables (due to larger capacitance). This settling time is configured with the STMPE811_Settling parameter.
If you have an oscilloscope around, you can hook it up to the 4 touch signals TSMX, TSPX, TSMY and TSPY to see the difference.
Regards, Andy
