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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Unified Power Format
The way in which UPF commands override each other is expressed through precedence rules. The standard describes extensions to the Tool Command Language Tcl: Elements of that oeee include:. 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.
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Deprecated commands should be replaced as soon as possible in current designs as future support cannot be guaranteed. Digital designers, IP Upd 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.
From Wikipedia, the free encyclopedia. Instead, precedence rules are used to allow later, more detailed UPF commands to override generic ifee that may have been inserted earlier to support behavioral logic simulation. We use iees to ensure that we give you the best experience on our website.
This strategy can be overridden for ieer named port on that domain, which in turn may be overridden by a command that specifies individual bits within a multibit port.
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. In 18001, retention strategies influence repeater, isolation and level-shifter strategies in turn.
As a reaction to the Power Forward Initiative the group was proposed in July and met on September 13, IEEE attempts to improve support for power modelling, implementation and verification throughout the lifecycle of an IC design.
The current release is IEEE Semantics for inferring additional elements in the design from the intent are provided in the standard.
Files written to this standard annotate an electric design with the power and power control intent of that design. Specific support for individual aspects of IEEE are currently unclear.
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 from ” https: Similarly, the structure for strategies is organized to allow high-level verification before implementation details are in place, and to avoid a decision later ifee from affecting the validity of that simulation. 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.
Equivalence can be overridden in scripts to provide greater control over strategies. A further addition is the concept of supply equivalence, 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. 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.
Atomic power domains provide greater control for IP providers by preventing users from subdividing a domain so that the different parts are power-gated separately if that is not explicitly supported by the IP.
IEEE Unified Power Format
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.
Hardware iCE Stratix Virtex. Accellera public groups area. The new version provides the ability to set power attributes on ports that are managed inside the macro. This page was last edited on 18 Novemberat 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. idee
Bailey was also chairman of the IEEE group. Retrieved August 7, Elements of that annotation include: A number of features have been added to better support design reuse and commercial IP, including the ability to set constraints on usage.
IEEE 1801-2013 (UPF 2.1)
Retrieved July 7, Attempting to create power domains inside an atomic domain will generate an error in compliant tools.
Legacy commands are fine for existing modules but are not recommended for new design 18801. If you continue to use this site we will assume that you are happy with it.