Circuit design apparatus and circuit design method
AssigneeFujitsu Limited
InventorsYasushi Umezawa, Takeshi Shimizu
Life of this patent
Estimating the term…
Abstract
A circuit design apparatus for designing an LSI including a memory circuit for storing data and an error protection circuit for performing an error protection over the data stored in the memory circuit on the basis of design information, the circuit design apparatus includes: an extracting unit for extracting information of configuration of the memory circuit with error protection circuit from the design information; and a circuit arrangement controller for determining whether to insert a check circuit for supplying a check signal into the memory circuit to verify the error protection circuit on the configuration information.
Claims5
A circuit design apparatus for generating design information of a circuit device, the apparatus comprising:
- an extracting unit that extracts information of a memory circuit with an error protection circuit from design information of a LSI, the error protection circuit being for performing an error protection over data stored in the memory circuit;
- a circuit arrangement controller that arranges design information of a check circuit into the design information of the LSI to generate the design information of the circuit device including the LSI and the check circuit, the check circuit including a storage circuit for storing a check signal and a controller circuit for controlling the storage circuit to output the check signal to the memory circuit extracted by the extracting unit in response to an external request, the check signal being input into the check circuit to generate an error in the memory for verifying the error protection by the error protection circuit;
- wherein the check circuit selectively supplies the check signal to the memory circuit with the error protection circuit, when the extracting unit extracts a plurality of the memory circuits,
- wherein the check circuit comprises:
- an access control unit that outputs a request;
- a selector that selects the memory circuit to which the check signal is to be supplied in accordance with the request from the access control unit;
- and
- a check signal output unit that stores the check signal and outputs the check signal to the memory circuit selected by the selector.
A circuit design method for generating design information of a circuit device, the method comprising:
- extracting information of a memory circuit with an error protection circuit from design information of a LSI, by using a computer, the error protection circuit being for performing an error protection over data stored in the memory circuit;
- arranging design information of a check circuit into the design information of the LSI to generate the design information of the circuit device including the LSI and the check circuit, by using a computer, the check circuit including a storage circuit for storing a check signal and a controller circuit for controlling the storage circuit to output the check signal to the memory circuit extracted in the extracting information, the check signal being input into the check circuit to generate an error in the memory for verifying the error protection by the error protection circuit
- wherein the check circuit selectively supplies the check signal to the memory circuit with the error protection circuit, when the extracting unit extracts a plurality of the memory circuits;
- wherein the check circuit comprises:
- an access control unit that outputs a request;
- a selector that selects the memory circuit to which the check signal is to be supplied in accordance with the request from the access control unit;
- and
- a check signal output unit that stores the check signal and outputs the check signal to the memory circuit selected by the selector.
Dependencies are inferred from the claim text.