Patent ID: 8788255
Filing Date: 2014-07-22
Classification: G06F

Abstract:
1. A delay analysis device for analyzing a delay property of a chip with reference to a cell timing library, said delay analysis device comprising: a processor and a memory; a global clock distribution unit that distributes at least one clock path toward an entire surface of the chip including an internal area of a macro based on a top netlist input thereto, thus producing a global clock distribution-implemented top netlist and global clock layout data; a region extraction unit which inputs the global clock distribution-implemented top netlist and outputs a region netlist of a region in a chip; a layout unit which inputs the region netlist to perform a layout process and outputs a layout-completed region netlist and region layout data; a delay calculation unit that performs RC simulation to calculate a delay time with respect to a specific region of the chip based on the cell timing library, the regional layout data and the layout-completed regional netlist, representing the specific region of the chip associated to the global clock distribution-implemented top netlist, thus producing regional delay information; a global clock delay annotation unit that annotates a clock path by global clock path delay information including edge information input thereto with respect to an initial stage of the specific region of the chip, thus producing a global clock delay-annotated regional netlist; a regional delay annotation unit that produces a regional delay-annotated regional netlist based on the global clock delay-annotated regional netlist including the clock path annotated by global clock path delay information including the edge information input thereto with respect to the initial stage of the specific region of the chip and the regional delay information; and a delay analysis unit that inputs timing constraint information in connection with the regional delay-annotated regional netlist to calculate a delay time of a signal path, a delay time of the clock path, and a clock skew, the delay analysis unit further checking whether or not a relationship between the delay time of the signal path and the delay time of the clock path meets the timing constraint information, thus producing delay analysis information.