A data access method for a timing controller of a flat panel display includes forming a line buffer including a plurality of memory cells in the timing controller, dividing the plurality of memory cells into a first section and a second section, wherein the number of memory cells in the first section is greater than the number of memory cells in the second section, writing a first number of pixel data into the first section, wherein the first number of pixel data is included in a plurality of pixel data corresponding to a row of a frame, writing a second number of pixel data into the second section, wherein the second number of pixel data is included in the plurality of pixel data, and the first number is equal to the second number, and reading the plurality of pixel data from the plurality of memory cells according to an order.