Nuts (and bolts) about 1801
Posted by Karen Bartleson on April 2nd, 2009
You could say I’m nuts about 1801. I’ve written about this standard for low power design many times, such as its open environment within IEEE and Accellera, the fact that users and vendors alike developed it, and how real customers have been using it as a successful, working standard. From the day that two leading customers of EDA began a rally around “open, quick, inclusive”, to the creation of the Unified Power Format (UPF) in Accellera, to its finalization as an IEEE standard, I’ve felt it took the right direction in EDA interoperability.
In a nutshell, here’s why:
- It allows flexibility in creating power strategies without forcing customers into a pre-defined flow.
- It permits choice by users. For those who want a single file to contain their IC’s power intent, 1801 works. For those who want power intent constructs in their RTL, 1801 works.
- It augments multiple existing standards such as Verilog, SDC design constraints, and Liberty. It didn’t make sense to reinvent the wheel and make IC engineers retool. Interoperability is served well when current standards are leveraged.
- It offers support for legacy designs. Low power chip design didn’t start after low power standards were born. (Quite the opposite.) Being able to continue using existing code and methodologies can help designers reduce errors and increase productivity.
- It enables different EDA vendors to develop unique solutions, following the 1st Commandment for Effective Standards: cooperate on standards, compete on tools.
In the near future, the IEEE process for ensuring healthy standards will bring about the next 1801 project. When this happens, I’ll post information about how everyone can participate in the P1801 working group.












I can hardly believe it. I’ve been in the EDA business since 1980 when I joined TI’s Design Automation Department after graduating from Cal Poly with my BSEE. Since 1995, much of my attention has been focused on EDA standards. I reached a moment of truth this year when I admitted, albeit reluctantly, that I could be called a standards-lifer. So, I decided it’s time to share my perspectives on what’s going on in the standards arena. Welcome to my blog - I can’t wait to hear from you!