Hi Dongsheng
you can check the TSS samples for the TWR board
C:\Freescale\Freescale_TSS_3_1\examples\TWRKXX_DEMO\build\cw10
please check the section for the keypad2,
I use the k60 and it can detect two number (like 4 and 1) that share one electrode touched at the same time.
Also you can use freemaster to check the delta variation on each electrode, with this variation you can detect the two diferent keys that share the same electrode
Have a great day,
Vicente
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