| 摘要 |
An integrated circuit memory for a color lookup table for a display system. The memory has a video port and path for reading data identifying colors for pixels at >100 or even >200 MegaHertz, and a CPU port and path for reading and writing data identifying colors at locations in the memory. Each memory cell includes a flip-flop with true and complement terminals. The CPU port includes two pass transistors, each having a first channel terminal coupled to the true or complement terminal, a second channel terminal coupled to a bidirectional bit line of the CPU path, and a gate coupled to a word line of the CPU path. The video port includes an isolated sensing terminal and two transistors. A first transistor has a first channel terminal coupled to the isolated sensing terminal, a second channel terminal coupled to a reference, and a gate coupled to the true or complement terminal. A second transistor has a first channel terminal coupled to the isolated sensing terminal, a second channel terminal coupled to a bit line of the video path, and a gate coupled to a word line of the video path. A layout configuration of each memory cell and of the memory cell array allows same-channel-type transistors from a plurality of memory cells to be formed in a single, large well, and allows adjacent memory cells to share contacts. This reduces the integrated circuit's size, improves its speed, and increases manufacturing yields.
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