Invecas, Inc.

Nancy Pratt

Kevin William Gorman

Thomas Chadwick

A memory built-in self test ('BIST') system comprises: a controller; a single port memory engine coupled to one or more single port memories; and a non-single port memory engine coupled to one or more non-single port memories. The controller receives operation codes ('op-codes') for testing a plurality of memory types. An output of the controller is coupled to inputs of the single port memory engine and the non-single port memory engine. The controller generates test instructions based on the received op-codes. The single port memory engine and the non-single port memory engine interpret the test instructions to test the one or more single port memories and the one or more non-single port memories.

Memory built-in self test system

A memory diagnostic system comprises a test engine and a miscompare logic. The test engine provides test instructions with expected data to a memory under test ('MUT'). The MUT processes such test patterns and outputs the results of such test patterns as stored data. The miscompare logic has local miscompare logics and a global miscompare logic. Each of the local miscompare logics compares a predefined range of bits of the expected data with a corresponding predefined range of bits of the stored data. One or more miscompare flags are generated for one or more miscompares determined by the local miscompare logics. The global miscompare logic monitors the one or more miscompare flags. When a total number of the miscompare flags exceeds a threshold number, the global miscompare logic generates a pause signal to the local miscompare logics to capture a current state of the local miscompare logics.

Diagnostics for a memory device

A fuse controller comprises: a fuse bay, a bus, an engine, and an interface. The fuse bay stores repair and setting information for a plurality of fuse domains in a linked-list data structure. The engine manages the linked-list data structure. The engine also is coupled to the fuse domains via the bus. The interface is coupled to the engine and receives commands and data for operating the engine.

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Essex, VT, United States of America

Nancy Pratt