Forum Post: TSC2007 Z1, Z2 definition

Hello forum,

I am using a TSC2007 with a 7" touch screen. I am trying to determine the proper way to tell if a valid touch is being applied to the screen. Reading the TSC2007 data sheet, it seems that Z1 or Z2 can be used for this. Is it necessary to read both Z1 and Z2 values to validate the touch or can just one of the two be read?

I should also note that the I2C channel is also running through a DS92LX2121 / DS92LX2122 chipset.

Thanks.

Brad.