Self-Diagnosis Device and Self-Diagnosis Method

• US 20150261637A1
• Filed: 03/04/2015
• Published: 09/17/2015
• Est. Priority Date: 03/17/2014
• Status: Active Grant

• Current Assignee: Renesas Electronics Corporation
• Original Assignee: Renesas Electronics Corporation
• Inventors: Ouchi, Masahide
• Granted Patent: US 10,031,824 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06F 11/27 Built-in tests

Abstract

A detailed execution schedule of self-diagnosis processing is set according to various requests.

A self-diagnosis device includes a plurality of functional blocks, a storage unit that stores a plurality of processing units, each of which is an aggregate of some functional blocks selected from the plurality of functional blocks, and a start condition of self-diagnosis processing of each processing unit, and a self-diagnosis unit that selects the processing unit where the self-diagnosis processing is started based on the start condition of each processing unit and executes the self-diagnosis processing of each functional block in the selected processing unit.

Claims

1. A self-diagnosis device comprising:

a plurality of functional blocks;

a storage unit that stores a plurality of processing units, each of which is an aggregate of some functional blocks selected from the functional blocks, and a start condition of self-diagnosis processing of each processing unit; and

a self-diagnosis unit that selects the processing unit where the self-diagnosis processing is started based on the start condition of each processing unit and executes the self-diagnosis processing of each functional block in the selected processing unit.

2. The self-diagnosis device according to claim 1,

wherein the self-diagnosis unit changes a functional block where the self-diagnosis processing is to be executed after a functional block where the self-diagnosis processing is being executed according to an execution status of other processing other than the self-diagnosis processing.

3. The self-diagnosis device according to claim 2,

wherein when the self-diagnosis unit starts the self-diagnosis processing of a functional block in the selected processing unit, if the functional block is being executed by the other processing, the self-diagnosis unit starts the self-diagnosis processing of another unexecuted functional block instead of the functional block.

4. The self-diagnosis device according to claim 3,

wherein each of the functional blocks has execution state information that indicates an execution state of the functional block,

wherein the self-diagnosis unit refers to the execution state information of the functional block in the selected processing unit before starting the self-diagnosis processing of the functional block, and

wherein when the execution state information indicates that the functional block is being executed by the other processing, the self-diagnosis unit starts the self-diagnosis processing of another unexecuted functional block instead of the functional block.

5. The self-diagnosis device according to claim 3,

wherein each of the functional blocks has permission information that indicates permission or non-permission of the self-diagnosis processing,

wherein the self-diagnosis unit refers to the permission information of the functional block in the selected processing unit before starting the self-diagnosis processing of the functional block, and

wherein when the permission information indicates that the self-diagnosis processing of the functional block is not permitted, the self-diagnosis unit starts the self-diagnosis processing of another unexecuted functional block instead of the functional block.

6. The self-diagnosis device according to claim 1,

wherein the start condition includes an execution order of the self-diagnosis processing of the functional blocks in each processing unit and a priority between the processing units, and

wherein the self-diagnosis unit selects the processing unit where the self-diagnosis processing is started based on the priority and executes the self-diagnosis processing of each functional block in the selected processing unit based on the execution order.

7. The self-diagnosis device according to claim 2,

wherein when the self-diagnosis unit changes a functional block where the self-diagnosis processing is to be executed after the functional block where the self-diagnosis processing is being executed, the self-diagnosis unit notifies that the functional block where the self-diagnosis processing is to be executed is changed as a self-diagnosis result.

8. The self-diagnosis device according to claim 2,

wherein when interrupt processing occurs before the self-diagnosis unit starts the self-diagnosis processing of a functional block in the selected processing unit, the self-diagnosis unit starts the self-diagnosis processing in another processing unit instead of the functional block.

9. The self-diagnosis device according to claim 2,

wherein when the self-diagnosis unit starts the self-diagnosis processing of a functional block in the selected processing unit, if a load of the entire self-diagnosis device by the other processing is lower than a predetermined value, the self-diagnosis unit starts the self-diagnosis processing of another unexecuted functional block along with the self-diagnosis processing of the functional block.

10. The self-diagnosis device according to claim 1,

wherein when there are two or more processing units whose start conditions are the same, the self-diagnosis unit adjusts start timing of the self-diagnosis processing of the functional blocks between the processing units.

11. A self-diagnosis device comprising:

a plurality of functional blocks;

a storage unit that stores an execution schedule of self-diagnosis processing of the functional blocks; and

a self-diagnosis unit that executes the self-diagnosis processing of the functional blocks based on the execution schedule,

wherein while executing the self-diagnosis processing, the self-diagnosis unit changes a functional block where the self-diagnosis processing is to be executed in the execution schedule according to an execution status of other processing other than the self-diagnosis processing.

12. The self-diagnosis device according to claim 11,

wherein the self-diagnosis unit executes the self-diagnosis processing in parallel with the other processing, and

wherein when a functional block where the self-diagnosis processing is to be executed based on the execution schedule is being executed by the other processing, the self-diagnosis unit starts the self-diagnosis processing of another unexecuted functional block instead of the functional block.

13. A self-diagnosis method using a semiconductor device that executes self-diagnosis processing of the functional blocks, the self-diagnosis method comprising:

setting the processing units, each of which is an aggregate of some functional blocks selected from the functional blocks, and a start condition of self-diagnosis processing of each processing unit;

selecting the processing unit where the self-diagnosis processing is started based on the start condition of each processing unit; and

executing the self-diagnosis processing of each functional block in the selected processing unit.