Design Perspectives on Intermittent Faults

Design Perspectives on Intermittent Faults
by Bernard Murphy on 10-08-2019 at 5:00 am

Bugs are an inescapable reality in any but the most trivial designs and usually trace back to very deterministic causes – a misunderstanding of the intended spec or an incompletely thought-through implementation of some feature, either way leading to reliably reproducible failure under the right circumstances. You run diagnostics,… Read More


Lint for Implementation

Lint for Implementation
by Bernard Murphy on 08-29-2019 at 6:00 am

When I was at Atrenta, we took advantage of opportunities to expand our static tool (aka linting) first to clock domain crossing (CDC) analysis and DFT compatibility and later to static analysis of timing constraints, all of which have importance in implementation. CDC is commonly thought of as an RTL-centric analysis, however,… Read More


RDC – A Cousin To CDC

RDC – A Cousin To CDC
by Alex Tan on 04-18-2018 at 12:00 pm

In a post-silicon bringup, it is customary to bring the design into a known state prior to applying further testing sequences. This is achieved through a Power-on-Reset (POR) or similar reset strategy which translates to initializing all the storage elements to a known state.

During design implementation, varying degrees of… Read More


Clock Domain Crossing in FPGA

Clock Domain Crossing in FPGA
by Alex Tan on 03-12-2018 at 12:00 pm

Clock Domain Crossing (CDC) is a common occurrence in a multiple clock design. In the FPGA space, the number of interacting asynchronous clock domains has increased dramatically. It is normal to have not hundreds, but over a thousand clock domains interactions. Let’s assess why CDC is a lingering issue, what its impact and the … Read More


Getting to IP Functional Signoff

Getting to IP Functional Signoff
by Bernard Murphy on 06-01-2017 at 7:00 am

In the early days of IP reuse and platform-based design there was a widely-shared vision of in-house IP development teams churning out libraries of reusable IP, which could then be leveraged in many different SoC applications. This vision was enthusiastically pursued for a while; this is what drove reusability standards and … Read More


CDC Verification for FPGA – Beyond the Basics

CDC Verification for FPGA – Beyond the Basics
by Bernard Murphy on 05-23-2017 at 12:00 pm

FPGAs have become a lot more capable and a lot more powerful, more closely resembling SoCs than the glue-logic we once considered them to be. Look at any big FPGA – a Xilinx Zynq, an Intel/Altera Arria or a Microsemi SmartFusion; these devices are full-blown SoCs, functionally different from an ASIC SoC only in that some of the device… Read More


Aldec Rounds Out ALINT-PRO Checker

Aldec Rounds Out ALINT-PRO Checker
by Bernard Murphy on 02-16-2017 at 7:00 am

If there’s anyone out there who still doesn’t accept the importance of static RTL verification in the arsenal of functional verification methods, I haven’t met any recently. That wasn’t the case in my early days in this field. Back then I grew used to hearing “I don’t make mistakes in my RTL”, “I’ll catch that in simulation”, “My editor… Read More


Blue Pearl adds RTL project transparency at #53DAC

Blue Pearl adds RTL project transparency at #53DAC
by Don Dingee on 06-03-2016 at 4:00 pm

You’re an RTL pro. You know what’s inside your code, and how many bugs you’ve tracked down and exterminated along the development path, and how much work remains. So, why did the meeting notice that just popped up asking for a monthly management project review presentation ruin your day?… Read More


Tcl scripts and managing messages in ASIC & FPGA debug

Tcl scripts and managing messages in ASIC & FPGA debug
by Don Dingee on 04-27-2016 at 4:00 pm

Our previous Blue Pearl post looked at the breadth of contextual visualization capability in the GUI to speed up debug. Two other important aspects of the ASIC & FPGA pre-synthesis workflow are automating analysis with scripts and managing the stream of messages produced. Let’s look at these aspects… Read More


Domain Crossing Verification Needs Continue to Grow

Domain Crossing Verification Needs Continue to Grow
by Bernard Murphy on 01-29-2016 at 4:00 pm

Clock domain crossing (CDC) analysis has been around for many years, initially as special checks in verification or static timing analysis, but it fairly quickly diverged into specialized tools focused just on this problem. CDC checks are important because (a) you can lose data or even lock up at, or downstream of a poorly-handled… Read More