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Difference between revisions of "System"

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(New page: The term "system" can be difficult to define, as it depends upon the perspective of the observer. The classical definition that a system comprises a process with one (or more) inputs and o...)
 
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== System ==
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The term "system" can be difficult to define, as it depends upon the perspective of the observer. The classical definition that a system comprises a process with one (or more) inputs and one (or more) outputs is meaningless in the context of SJTAG.
 
The term "system" can be difficult to define, as it depends upon the perspective of the observer. The classical definition that a system comprises a process with one (or more) inputs and one (or more) outputs is meaningless in the context of SJTAG.
  

Revision as of 22:11, 31 July 2008

System

The term "system" can be difficult to define, as it depends upon the perspective of the observer. The classical definition that a system comprises a process with one (or more) inputs and one (or more) outputs is meaningless in the context of SJTAG.

At the simplest level, a system may be any combination of electronic circuit boards which together perform some meaningful function. What is important to realise here is this concept of a system enforces the consideration that a system is a hierarchical entity: A "system" comprising a rock of several PCBs my be a sub-system of a larger entity, and so on, almost ad infinitum.

SJTAG aims to make the Boundary Scan functions of the lowest structural assemblies (typically the PCBs) available for re-use at all the higher levels of integration.