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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If you continue to use ufp site we will assume that you are happy with it. The current release is IEEE The standard describes extensions to the Tool Command Language Tcl: IEEE attempts to improve support for power modelling, implementation and verification throughout the lifecycle of an IC design. Semantics for inferring additional elements in the design from the intent are provided in the standard.
Users can each download a single copy of IEEE by providing an email address at the Get website. Elements of that annotation include: The new version provides the ability to set power attributes on ports that are managed inside the macro. 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.
Unified Power Format – Wikipedia
Retrieved July 6, 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. Accellera public groups area. Deprecated commands should be replaced as soon as possible in current designs as future support cannot be guaranteed. 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.
In general, retention strategies influence repeater, isolation and level-shifter strategies in turn. Retrieved August 7, 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. Instead, precedence rules are used to allow later, more detailed UPF commands to override generic commands that may have been inserted earlier to support behavioral logic simulation.
Hardware iCE Stratix Virtex. 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.
Latest version of IEEE 1801/UPF available for free
As a reaction to the Power Forward Initiative the group was proposed in July and met on September 13, 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.
Legacy commands are fine for existing modules but are not recommended for new design modules. An important underlying concept is that of incrementality, to allow the design to be gradually elaborated over time as more implementation detail is added without forcing engineering teams to keep rewriting the command scripts.
From Wikipedia, the free encyclopedia. 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.
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”.
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: Views Read Edit View history. Files written to this standard 101 an electric design with the power and power control intent of that design. Where can I find it? 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.
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.
P P P P P Equivalence can be overridden in scripts to provide greater control over strategies. The way in which UPF commands override each other is expressed through precedence rules.
This page was last edited on 18 Novemberat 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. 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.
Attempting to create power domains inside an atomic domain will generate an error in compliant tools.