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PTN0805E1333BSTS_Vishay / Dale_Chip Resistor - Surface Mount

来源:LM317 Electronics Components编辑:MoSys时间:2021-06-15 15:21:28

More than two years after the first reader devices hit the streets, e-books lag early forecasts, their installed base is small and revenues are miniscule compared to paper books.

Brian Bailey – keeping you entertained

If you found this article to be of interest, visit EDA Designline where – in addition to my blogs on all sorts of stuff” – you will find the latest and greatest design, technology, product, and news articles with regard to all aspects of Electronic Design Automation (EDA).

PTN0805E1333BSTS_Vishay / Dale_Chip Resistor - Surface Mount

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Most people assume that when you say reuse you're talking about design reuse, which offers some serious benefits in the development of a complex device. Design teams have to reduce the time and cost required to develop their highly complex chips, so what better way to do that then use blocks that were already created for a similar design? Using IP blocks to design a system saves the team time, money and a lot of headaches.

But what most people forget when they talk about design reuse are the associated verification problems that come with incorporating blocks in designs. For one, the block was designed and verified for a specific target design, but may now be used in a design that is different than the original. Even if the design differs just slightly from the original, the verification team cant assume it will work in the new design as it did in the original. What about the functionality of the block? The team that is now using the block didn't create it and quite possibly the engineer who did has already moved on to another job. So how do they know how the block really works in the given application? And if they don't know the detailed intricacies of the block, then how can they possible verify it?

PTN0805E1333BSTS_Vishay / Dale_Chip Resistor - Surface Mount

All of these concerns point to a much larger definition of reuse, or at least a segmenting of it. We associate design” with reuse,” but what about verification reuse? Reusing pieces of design code brings tremendous benefits to the design team. Just imagine what a reusable piece of verification code can do. Considering that verification is consuming 50 percent to 80 percent of the total development schedule, if you can reuse some of that work and cut that time down by even a small percentage, you can have a dramatic impact on your schedule.

Types of verification reuse So what exactly is verification reuse and how does it work? There are basically two types of verification reuse: within the same project and between different projects.

PTN0805E1333BSTS_Vishay / Dale_Chip Resistor - Surface Mount

Reuse within a project is simply reusing verification code within different stages of the development or verification cycle. A good example of this is bringing verification code from the module verification to the unit level and then the system level. There are many components to this and some parts do get discarded as you move up in the level of abstraction, but there are benefits to developing your verification methodology around this type of reuse. See figure 1

The GP1013X, like many new I-Bus/Phoenix products, is built with their proprietary Maximum Cool” technology, which provides separate cooling sections for cards/power and drives. Pricing depends on configuration.

For actual production work, I-Bus/Phoenix has introduced the 14U-high GS1077 HA Sun SPARC Cluster System. Part of the G2077 family of cluster systems, the GS1077 ships with two independent system boards (Sun CP1500 SBCs with up to a 440 MHz UltraSPARC IIi and 1 GB of ECC RAM per board), both configured as a Cluster Server.

You can set up a RAID 0+1 drive array with four 18 GB Ultra 160 SCSI drives, and still have room for two 18 GB Ultra 160 local SCSI drives and two CD-ROMs.

The 14 cPCI slots are split into two seven-slot modular cPCI backplanes. Ten of the 14 are user expansion slots (H.110 compliant). There's also a three-slot modular N+1 power supply backplane and an optional media bay backplane is also available that has its own floppy and local SCSI drive.

The G0808 CompactPCI enclosure from I-Bus/Phoenix is more of an entry-level system, with its eight H.110 cPCI slots, one being a Master Slot that can hold an 8 HP wide Pentium III or SPARC cPCI processor board, three 5.25-inch drive bays, two 3.5-inch drive bays, and various supply options (single or dual 400W AC/DC power) in an 8U-high package. Pricing for the G0808 cPCI enclosure begins at $1,449 for a basic configuration.

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