Invention Grant
- Patent Title: LBIST debug controller
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Application No.: US14875717Application Date: 2015-10-06
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Publication No.: US09766289B2Publication Date: 2017-09-19
- Inventor: Mayank Parasrampuria , Anurag Jindal , Sagar Kataria
- Applicant: FREESCALE SEMICONDUCTOR, INC.
- Applicant Address: US TX Austin
- Assignee: NXP USA, INC.
- Current Assignee: NXP USA, INC.
- Current Assignee Address: US TX Austin
- Agent Charles E. Bergere
- Main IPC: G01R31/3183
- IPC: G01R31/3183 ; G01R31/3185 ; G01R31/317

Abstract:
An integrated circuit (IC) includes a logic built-in self-test (LBIST) system that includes scan chains. The scan chains receive a clock signal and test pattern signals, and generate scan out signals. A debug controller receives the scan out signals and shifts a set of the scan out signals to a joint test action group (JTAG) controller. The debug controller also maintains a dynamic count indicative of the number of debug shift operations performed, and compares the dynamic count with a final count. If the dynamic count is less than the final count, the debug controller performs a second debug shift operation, which facilitates determination of a fault location in the IC.
Public/Granted literature
- US20170097388A1 LBIST DEBUG CONTROLLER Public/Granted day:2017-04-06
Information query
IPC分类: