Invention Grant
- Patent Title: Systems and methods for optimizing scan pipelining in hierarchical test design
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Application No.: US17203497Application Date: 2021-03-16
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Publication No.: US11409931B1Publication Date: 2022-08-09
- Inventor: Jagjot Kaur , William Scott Gaskins
- Applicant: CADENCE DESIGN SYSTEMS, INC.
- Applicant Address: US CA San Jose
- Assignee: CADENCE DESIGN SYSTEMS, INC.
- Current Assignee: CADENCE DESIGN SYSTEMS, INC.
- Current Assignee Address: US CA San Jose
- Agency: Foley & Lardner LLP
- Main IPC: G06F30/333
- IPC: G06F30/333 ; G06F30/30 ; G06F30/32 ; G06F30/396 ; G06F119/12 ; G01R31/3185 ; G01R31/317

Abstract:
A system for optimizing scan pipelining may include a processor and a memory. The processor may generate and insert, based on prior analysis of the physical layout of the circuit, an optimized number of pipeline stages between a first block and a second block in a hardware test design, a first scan chain including at least one pipeline stage of a head pipeline stage or a tail pipeline stage. The processor may insert a plurality of flip-flops into the first scan chain. The processor may determine at least one clock to be used for the at least one pipeline stage, using the plurality of flip-flops so as to eliminate the need of a lockup element between the at least one pipeline stage and the plurality of flip-flops. The processor may generate, based on the at least one clock, a second scan chain that connects the at least one pipeline stage and the plurality of flip-flops.
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