The Unified Power Format (UPF) , officially known as IEEE Standard , was approved by the IEEE in December and will be. (Official IEEE P home page is here). Unified Power Format (UPF) is the popular name of the Institute of Electrical and Electronics Engineers (IEEE) standard. You learn about IEEE power supply networks, ground ports and nets, versions of UPF Debug design scenarios Analyze non-standard IEEE coding.
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Hard macros presented a problem for earlier versions of UPF if those macros implemented their own power-management as switchable power domains were the only way to define power supplies to domains that could be powered up and down.
IEEE Unified Power Format
An important underlying concept is that of incrementality, to allow the design ueee be gradually elaborated over time as more implementation detail is added without forcing engineering teams to keep rewriting the command scripts. Specific support for individual aspects of IEEE are currently unclear.
As a language level, the command set has been structured to support successive refinement of power intent to reduce the usage overhead on design teams. The new version provides the ability to set power attributes on ports that are managed inside the macro. Legacy commands are fine for existing modules but are not recommended for new design modules. Instead, precedence rules are 180 to allow later, more detailed UPF commands to override generic commands that may have been inserted earlier to support behavioral logic simulation.
A further addition is the concept of supply iee, in which supply nets can be treated as electrically or functionally equivalent to reduce the number of source and sink attributes that need to be defined. This page was last edited on 18 November 18011, at P P P P P The current release is IEEE This strategy can be overridden for a named port on that domain, which in turn may be overridden by a command that specifies individual bits within a multibit port.
Elements of that annotation include:. Accellera public groups area. Semantics for inferring additional elements in the design from the intent are provided in the standard.
Unified Power Format – Wikipedia
IEEE attempts to improve support for power modelling, implementation and verification throughout the lifecycle of an IC design. From Wikipedia, the free encyclopedia. Changes in IEEE took advantage of industrial experience and a wider user base to perform a cleanup of the original standard, as well as adding new commands to support incremental specification of power modes and behavior.
Retrieved July 7, Deprecated commands should be replaced as soon as possible in current designs as future support cannot be guaranteed. Several informative annexes have been added to the standards document, such as Annex E, which provides a low-power design methodology based on the standard, and Annex I, which provides examples of how to model power-management cells.
The emphasis of the latest version of the standard focuses on usability in industrial designs, restricting some of the freedom of the command set but providing better guidance for design teams trying to design ICs with complex power modes and behavior.
Latest version of IEEE 1801/UPF available for free
Bailey was also chairman of the IEEE group. A number of features have been added to better support design reuse and commercial IP, including the ability to set constraints on usage.
Retrieved from ” https: The standard describes extensions to the Tool Command Language Tcl: If you continue to use this site we will assume that you are happy with it. Equivalence can be overridden in scripts to provide greater control over strategies.
IEEE 1801-2013 (UPF 2.1)
In general, retention strategies influence repeater, isolation and level-shifter strategies in turn. Similarly, the structure for strategies is organized to allow high-level verification before implementation details are in place, and to avoid a decision later on from affecting the validity of that simulation.
Add support for bottom up and top down design add documentation of the support for wildcard and regular expression selection of design instances clarify the differences between ports and pins provide for convergence capability from both UPF and Common Power Format of the Silicon Integration Initiative Si2 The IEEE group was initially called the “Low Power Study Group”.
Retrieved August 7, Attempting to create power domains inside an atomic domain will generate an error in compliant tools. Where jpf I find it? As a reaction to the Power Forward Initiative the group was proposed in July and met on September 13, Proposed standards have the letter “P” in front of them such as Pwhich is removed and replaced with a dash and year when the standard is ratified.
Retrieved July 6, Hardware iCE Stratix Virtex. Files written to this standard annotate an electric design with the power and power control intent of that design. Digital designers, IP Block providers, Physical Designers, and Verification engineers make use of this standard language to communicate their design intent and implementation with respect to the variable power of an electronic system.