lcd module displays is a block diagram of a logic circuit interface module

display module display is 128, 64 lines, 64 lines using a line driver outputs and two columns of the drive controller, where each piece of column driver 64 outputs. Line driver and the Graphic lcd modules does not matter, as long as the power can be generated to provide the drive signal and the synchronous signal, the external signal module only on the column drivers. Column driver built display memory, RAM is divided into 8, page 8 lines; each pixel on the display state of the display data memory correspondence you display data memory directly as a graphical display of the drive signal , "1" shows "0" is not displayed. Figure 1 is a block diagram of a logic circuit interface module.Instruction modules and LCD driver Serial display modules compatible controller, a total of seven instructions. Not described in detail here, as listed in Table 2 only instruction list. Among them, the state is set to show the first two instructions, the rest of the class to read and write commands.interface connection in two ways: one is the direct access mode, the other is indirect access. Either way, you want to access the module must first read the contents of the status register to determine the "busy" flag can be accessed when not busy. Direct access method is a module interface as a memory or I / O devices directly linked to the MCU bus, MCU to access memory or I / O device mode the module operation. Indirect access MCU module is operated via software simulation control timing.