摘要:
A circuit designing apparatus of an interactive type which enables a simplified and high-speed circuit design process while largely reducing a burden on a designer, having a speed analyzing unit for conducting a delay computation for each wiring path on a circuit to be designed and a display control unit for displaying a result of the delay computation by the speed analyzing unit on a display unit. When the speed analyzing unit conducts a delay computation, a delay value of each logic component forming the circuit that is an object of the design is set and altered according to a dullness of a signal waveform inputted to the logic component. The circuit designing apparatus of an interactive type may be applied to a system for conducting a circuit design of an integrated circuit such as an LSI or the like or a printed circuit board.
摘要:
A placement/net wiring processing system uses an interactive editor which eases and simplifies operations for placing or moving cells and adding, deleting or modifying wiring. The placement/net wiring processing system comprises a control means for controlling the execution of a placement and wiring operating and processing program, a display means for displaying placement and wiring information on a screen, an operating and processing means for operating the placement and wiring on the screen, and an information management means for managing the placement and wiring information. The control means copies the program read out thereby and afterwards executes the program. The display means displays the contents of the placement and wiring graphic information on the screen in accordance with the selection and relates processing-related information associates with placements and wiring which are read out of a storage division and designated by user to the placement and wiring graphic information for display on a screen.
摘要:
A placement/net wiring processing system uses an interactive editor which eases and simplifies operations for placing or moving cells and adding, deleting or modifying wiring. The placement/net wiring processing system comprises a control means for controlling the execution of a placement and wiring operating and processing program, a display means for displaying placement and wiring information on a screen, an operating and processing means for operating the placement and wiring on the screen, and an information management means for managing the placement and wiring information. The control means copies the program read out Thereby and afterwards executes the program. The display means displays the contents of the placement and wiring graphic information on the screen in accordance with the selection and relates processing-related information associated with placements and wiring which are read out of a storage division and designated by the user to the placement and wiring graphic information for display on the screen.
摘要:
The invention concerns a technique of a wiring processing method used in designing, for example, a large scale integrated circuit. The wiring processing method of the invention is provided with: a segment dividing step for dividing a wiring connecting between two receivers of a clock net into three or more segments; an equal delay branch segment determining step for comparing a first delay time from one branch point on one end of the segment to one receiver with a second delay time from the one branch point to the other receiver, and comparing a third delay time from the other branch point on the other end of the segment to the one receiver with a fourth delay time from the other branch point to the other receiver, and determining a segment in which a magnitude of the first delay time against the second delay time and a magnitude of the third delay time against the fourth delay time are inverted as an equal delay branch segment; and an equal delay branch point determining step for determining an equal delay branch point in the equal delay branch segment. Thus, the equal delay branch point is accurately determined, and thereby the clock skew on the clock distributing circuit in a clock synchronous circuit is reduced.
摘要:
A wiring information generating apparatus includes an input unit that inputs a wiring layer number indicating a wiring layer, a via layer number indicating a next via layer to connect the wiring layer, and spacing information based on wiring rules. A storage unit stores a terminal figure table providing terminal figures, a logic element device wire protected area table, and a wire protected area table. A wire protected area creation unit adds an area of a terminal figure and a logic element device wire protected area obtained by searching the terminal figure table and the logic element device wire protected area table based on the input wiring layer number and/or via layer number and acquires wire layer-via layer spacing information. A wiring information generating unit generates wiring information in the wiring layer based on connection information and arrangement information of the semiconductor logic circuit, and wire protected area information.
摘要:
A wiring information generating apparatus includes an input unit that inputs a wiring layer number indicating a wiring layer, a via layer number indicating a next via layer to connect the wiring layer, and spacing information based on wiring rules. A storage unit stores a terminal figure table providing terminal figures, a logic element device wire protected area table, and a wire protected area table. A wire protected area creation unit adds an area of a terminal figure and a logic element device wire protected area obtained by searching the terminal figure table and the logic element device wire protected area table based on the input wiring layer number and/or via layer number and acquires wire layer-via layer spacing information. A wiring information generating unit generates wiring information in the wiring layer based on connection information and arrangement information of the semiconductor logic circuit, and wire protected area information.
摘要:
A placement/net wiring processing system uses an interactive editor which eases and simplifies operations for placing or moving cells and adding, deleting or modifying wiring. The placement/net wiring processing system comprises a control means for controlling the execution of a placement and wiring operating and processing program, a display means for displaying placement and wiring information on a screen, an operating and processing means for operating the placement and wiring on the screen, and an information management means for managing the placement and wiring information. The control means copies the program read out thereby and afterwards executes the program. The display means displays the contents of the placement and wiring graphic information on the screen in accordance with the selection and relates processing-related information associates with placements and wiring which are read out of a storage division and designated by user to the placement and wiring graphic information for display on a screen.
摘要:
A circuit designing apparatus of an interactive type which enables a simplified and highspeed circuit design process while largely reducing a burden on a designer, having a speed analyzing unit for conducting a delay computation for each wiring path on a circuit to be designed and a display control unit for displaying a result of the delay computation by the speed analyzing unit on a display unit. When the speed analyzing unit conducts a delay computation, a delay value of each logic component forming the circuit that is an object of the design is set and altered according to a dullness of a signal waveform inputted to the logic component. The circuit designing apparatus of an interactive type may be applied to a system for conducting a circuit design of an integrated circuit such as an LSI or the like or a printed circuit board.