Device and method for testing a device
AssigneeFreescale Semiconductor, Inc.
InventorsOshri Shomrony, Aner Kantor, Lior Moheban, Ytzhak Rosenthal
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Abstract
A device that includes a core and a wrapper. The wrapper includes at least one shared wrapper cell that is shared by a group of core pins that belong to a single clock domain. A method for designing a wrapper. The method includes receiving design information representative of a design of a core, locating a group of mutually independent core pins that belong to a single clock domain; and designing a shared wrapped cell that is shared by the group of core pins.
Claims20
A device that comprises:
- a data processor core;
- and
- a plurality of wrapper cells for providing test access to the data processor core, the plurality of wrapper cells including a first wrapper cell that is shared by a group of pins of the data processor core that belong to a single clock domain, wherein each of the plurality of wrapper cells consists of only one flip flop and other components that are not flip flops.
A method comprising:
- configuring an operational mode of a data processor core using automated test equipment;
- and
- providing a test signal to a group of core pins that belong to a single clock domain using a first wrapper cell of a plurality of wrapper cells if the operational mode is a test mode, the plurality of wrapper cells to provide test access to the data processor core, wherein each of the plurality of wrapper cells consists of only one flip flop and other components that are not flip flops.
A method for designing a test access wrapper at a data processor core, the method comprising:
- receiving at a computer information representative of a design of the data processor core;
- identifying at the computer a first group of core pins that are logically independent and that belong to a single clock domain;
- and
- instantiating a first wrapper cell at the design that is shared by the first group of core pins, wherein the first wrapper cell consists of only one flip flop and other components that are not flip flops.
Dependencies are inferred from the claim text.