| 摘要 |
PURPOSE:To generate the mask patterns with a single device to various types of LSI chips by preparing the ROM part layout information and the ROM part cell information on each chip in the form of a library. CONSTITUTION:When the prepared input data are read, a necessary layout is read out of the ROM part layout information prepared as a library and set at a ROM part layout processing part. Then the ROM part layout processing is carried out based on the ROM part layout information. Then the necessary ROM cell information is set at a mask pattern generating part out of a prepared ROM cell information library. Thus a mask pattern is generated. Then the data are outputted to a mask pattern output part and the generation of the mask pattern is completed. In other words, it is just required to add the layout information and the cell information corresponding to a new chip to the library in order to deal with the new chip. |
