The Research into the Problem of the LCD Controller Accessing the Frame Memory

Aiming at the problem of the LCD controller accessing the frame memory exiting in the design of LCD controller, on the base of analyzing and comparing the two familiar solving schemes, a new one is put forward. A new type LCD controller is designed and realized by applying the scheme. The problem of conflict between reading and writing frame cache is solved through the time-division multiplexing technology; The function of the data transmission among the system micro-processor, the LCD controller and the LCD driver is realized by making use of FIFO circuit; The operation of reading and writing SRAM is finished by using the state transition mechanism; The configuration and working principle of the SRAM Interface module of the LCD controller is analyzed. Finally, the solving scheme is verified by simulating in the Quartus II, and the display function is realized on the ARM+FPGA platform.