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Jul 16, 2019 · We also explain how these inherent features help to foster and establish exact relationships between UPF and DUT objects in order to develop UPF for power management, implementation, and, as well, conducting power aware verification.
UPF is an acronym for Unified Power Format which is an IEEE standard for specifying power intent. In this article we will learn about writing an UPF for a given power requirement in a design. Consider the design shown below –. Figure 1: Logical hierarchy of the design. Given Power Intent.
- Semantics: When “Is” Doesn’T Mean “Is”
- Power States
- Port Versus Path Based Semantics
- UPF Attributes
- Conclusion
With every new version of the UPF standard, new commands are introduced and a number of semantics or concepts are clarified. Most of the time these clarifications are not aligned and are not backward compatible. Thus, as all semantic clarifications are meant to address the problems or gaps in previous standards, as a general practice it is importan...
UPF defines two separate styles of capturing power state information: Power State Tables (PST) and Power States. Power states play a significant role in describing the power intent. If the power states are not defined properly, there will be significant consequences, as they are used for both verification and implementation of power management. Pow...
Whenever source logic goes OFF and sink logic in an ON state, there is a need for isolation. UPF provides a set_isolationcommand to specify how and where the isolation cell gets inserted. If the isolation is not inserted properly at the right path, then it can lead to a functional failure. If the isolation is placed at a location where it is not re...
UPF supports the specification of certain properties of objects in a design. These attributes provide information that supports or affects the meaning of related UPF commands. Such attributes can also be defined with HDL attribute specifications in design code or with Liberty attribute specifications in a Liberty model. Since there are more than on...
There is no single answer to the question “which is the right standard for my design?” However with a clear understanding of the syntax and semantic changes over the UPF releases, designers will have a better judgment of the UPF version for their respective design. These guidelines will come in handy when you aren’t sure which flavor of UPF you wan...
IEEE 1801-2013 updates and refines the Unified Power Format for low-power VLSI design, reflecting changes in IC power modeling and verification.
Mar 3, 2014 · This tutorial presents the latest information on the Unified Power Format (UPF), based on IEEE Std 1801-2013 UPF which was released in late May 2013. Beginning with a review of the concepts, terminology, commands, and options provided by UPF, it will cover the full spectrum of UPF capabilities and methodology, from basic flows through advanced ...
Aug 11, 2023 · UPF offers a comprehensive set of features that enable designers to effectively manage power intent throughout the design process, ensuring efficient power consumption and optimization. Here's...
People also ask
Which concepts have been changed in multiple UPF standard releases?
What is Unified Power Format (UPF)?
Why did UPF 2.1 fail?
Why do I need a different UPF standard?
– Two new predefined power states for all objects, UNDEFINED and ERROR state. • ERROR state: Represents error condition in which two mutually exclusive states are both active at the same time.
