LCD interface to Controller
The datasheet is the only real answer. 

It looks like this LCD has a combination of interfaces:


DB0 .. DB15 with RD and WR seem to be a parallel interface (for the LCD??)
The D_* pins seem to be a serial (SPI-like) interface (for the touch-screen??)
the SD_* pins seem to be another serial (SPI-like) interface - is this one of thise LCDs with an on-board SD card connector?


A parallel interface with separate RW en WR pins (8080 style) requires that one of those pins is made active to do a read or write cycle. Often an alternative 'format' is provided where one pin selects between read and write, and another pin is activated to do a cycle (6800 style).