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Category: Boundary Scan

Flying Probe Testers and Boundary Scan

Alan Sguigna
Alan Sguigna
Today’s flying probe testers can give high structural test coverage, making them ideal for prototype board bring-up and low-volume manufacturing. But they can be darned slow. Can boundary scan help?

Increasing densities and shrinking form factors

Alan Sguigna
Alan Sguigna
Isn’t it a great time to be a board designer? Compared to twelve years ago, the average number of nets has gone from 1,544 to 2,832; the number of pin-to-pin connections has increased from 7,661 to 13,573; the number of components has grown from 1,120 to 3,518; and many other challenges to the job have arisen.

What is Board Bring-Up, and why does it take so long?

Alan Sguigna
Alan Sguigna
Board bring-up is a phased process whereby an electronics system is repeatedly tested, validated and debugged, in order to achieve readiness for manufacture. This process can take so long that a product never gets to market because it is succeeded by the next generation...

Fast Flash Programming

Alan Sguigna
Alan Sguigna
Programming NOR or large NAND flash devices can be done using a variety of technologies, including boundary scan (JTAG), processor-controlled test (emulation), or FPGA-controlled test. Which embedded instrument you use is a trade-off between speed, complexity and cost.

The Coming Crisis in Board Bring-Up

Alan Sguigna
Alan Sguigna
I was reflecting on how much processor speeds, memory, and data transmission rates have increased over the last few decades. And yet the same old tools and techniques are often used to bring up new designs. When do you think we fall off the cliff?

Don’t be Intrusive!

Alan Sguigna
Alan Sguigna
Ever heard the old saw about the guy (gal) that “went to a fight and a hockey game broke out”? I’d characterize the ongoing debate on the value and longevity of In-Circuit Test (ICT) as a bit of a brawl…

Board Bring-Up

Alan Sguigna
Alan Sguigna
Board bring up of an early prototype is one of the most important steps for a design team. The first boards must pass through a battery of tests to demonstrate that the hardware is rock-solid. Non-intrusive technologies can be used to accelerate this process.
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