Efficient Structured Scan Patterns Retargeting for Hierarchical IEEE 1687 Networks.
2019
The IEEE 1687 standard introduced a large design space of compliant networks for accessing embedded instruments. Such networks could grow in their structural complexity and inter-component temporal dependencies. Scan pattern retargeting is defined as the procedure of translating an instrument-level pattern to several network-level ones. Pattern retargeting could become computationally intensive with the increase of structural and temporal dependencies. Structured pattern retargeting was previously introduced as a formal and light-weight pattern retargeting methodology for arbitrary IEEE 1687 networks. In this work, we present a dedicated structured retargeting method for hierarchical IEEE 1687 networks. The proposed method significantly reduces the retargeting time for pure hierarchical networks compared to the general one, while resulting in the same network access time. The retargeting time is of a special importance in the case of on-chip retargeting, which is used for on-line monitoring using IEEE 1687 networks.
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