| 摘要 |
PROBLEM TO BE SOLVED: To provide the system for efficiently addressing a synchronous DRAM (SDARM) in a video memory circuit that stores pixel data of a video supplied to a display device. SOLUTION: A memory array consists of 2-bank (0, 1)×2-block (A, B). Pixel data of a first half of odd number lines of a video image are given/received/to/from the bank A0, and pixel data of a latter half of odd number lines of the video data are given/received to/from the bank B0. Then a user can access the memory array for the pixel data of the first half and the latter half of one horizontal line simultaneously. Moreover, pixel data of adjacent odd number lines and pixel data of adjacent even number lines in the video image can simultaneously be read from the memory array.
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