Capacitive touch is very sensitive to power noise. Ripple
voltage/current from the power adapter will cause the LCD
ripples, and will also cause the capacitive touch malfunction:
If you use the APK Multi-Touch under Android to test, you can
find the touch point float. There are several ways to solve
this problem:
1) Use a high quality power adapter. Or use battery to
provide the power like cell phone or tablet PC.
2) If user power adapter can’t be good enough, there’s
another effective method to solve this problem: Make sure the
CS19108F215P-C111 power input connector
Pin 3 really connect
to user “Power System Ground”
. This method can eliminate the
problem totally. User can also use another method to test this
problem: touch the GND of CS19108F215P-C111 by one hand, the
other hand operates on the capacitive touch screen. In this
case, user’s body acts as the Power System Ground.
DB9 Connector
The product CS19108F215P-C111 has 4*DB9 connectors configured
as RS232 by default. as Figure 5 shows .COM3/COM4 can be
customized to RS485. If you need any other setting different
to the default setting, please
