(TCO 1) For the LCD, describe the function accomplished with the data bus (D0 thru D7) signals. Also, indicate whether these signals are an LCD input or LCD output. Solution Generally LCD having VSS, VDD power supply pins and Enable (E), R/W, RS and D0-D7 pins. The D0 to D7 pins are called as data line which perform read/write of data. These are the outputs of the LCD..