TVS06RK-25-37PB-LC_Datasheet PDF

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Its Q3 Compaq shipments more than halved at 185000. Hewlett-Packard, which also uses the Microsoft OS, suffered a significant fall as well. However, Casio, a third Microsoft licensee, was sharply up.

For developers faced with abandoning their CE-based applications because .NET contains no provisions for running Java, a number of companies-such as IBM, Intrinsyc and Wind River-are beginning to introduce bridgeware” products to act as negotiators between the two frameworks. In addition, because of the increased interest among Linux developers in Web services, open-source bridgeware products such as Mono and dotGNU are under development.

Of more than 300 Linux developers contacted in a recent study, 70 percent believe the Web-services model represents the future of Internet applications,” said Lou Grinzo, Evans Data Corp.'s Linux analyst. More than 42 percent of respondents said they are currently developing Web-services-enabled applications, and more than two-thirds expect to do so in the next 12 to 24 months, Grinzo reported.The big question for developers, he said, is how to walk a fine line between the two Web frameworks and still maintain enough independence to be perceived as a viable middle ground for development.

TVS06RK-25-37PB-LC_Datasheet PDF

Mono is an attempt at an independent open-source development environment. It will incorporate a C-sharp compiler; a virtual execution system with a just-in-time compiler, garbage collector, loader, threading engine and a byte-code interpreter; and an implementation of the .Net class library. It will also include a set of visual development tools.

A second effort, a FreeDevelopers Project called dotGNU, is in a sense a Web-services superset of both the .Net and Java/XML frameworks. It will contain a Secure Execution Environment that can download any byte code, including Java and C-sharp, from the network and execute it in a secure manner in a distributed execution environment (defined as an operating system for a distributed computer” consisting of several instances of the secure execution environment running on several computers). DotGNU will attempt to support multiple languages, including both Java and C-sharp, allowing the development of applications that could execute in a number of programming languages.

The success of such efforts would mean the industry could work in either environment and still have a viable Web-services framework, said Michael Tiemann, chief technical officer at Linux/GNU tool vendor Red Hat Inc. (Research Triangle Park, N.C.). This kind of framework would seem transparent to language and be capable of working with any run-time executable or virtual machine.

TVS06RK-25-37PB-LC_Datasheet PDF

Right now, he said, Java/XML-centered Web-services frameworks seem to have the momentum in the market. As for the Microsoft .Net and C-sharp initiative, Tiemann says that time-and not developer resistance-could be the enemy. Microsoft is very good at exposition and promotion of its visions, and as far as Web services are involved we should all be grateful,” he said. It is in the timely implementation of that vision where it falls short.”

Compared with the Java/XML frameworks, for which dozens of tools and support software exist, Tiemann does not expect to see reliable, fully supported tools from Microsoft for a number of years.

TVS06RK-25-37PB-LC_Datasheet PDF

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International Rectifier Corp. is pressing deeper into the automotive-IC market with an all-out effort to reduce cost and power consumption through integration.

Throughout the product life cycle, designs that are subject to ECOs are extracted from the archive vault or PDM system back to the release area. There, the compressed design database is expanded back to the original, read-only native CAD format. Subsequently, the design is unreleased” back to the project area where design activities may begin on a new revision.

Library implications on the design process

Most businesses organize central EDA libraries to support logical and physical design. Individual parts are comprised of schematic symbols, layout geometries, part description records and symbol-to-geometry pin map instructions. Engineers use various library browsers to select symbols in these libraries to build schematic sheets. CAD designers use similar browsing methods to choose particular geometries to use in the physical layout.

Many vendor tools permit reference links to be inserted in the schematic database as opposed to copying the selected symbol local to the design. This is useful for reducing the size of the product database, but makes it difficult to produce a self-contained copy of the design. As libraries are moved or parts within them change, the effect on product designs is immediate and can be significant.

Let's assume, for example, that a particular inverter is selected from a library and added using a reference link on a schematic sheet. Nets are connected and the schematic is subsequently promoted to layout. Later, the inverter in the central library is modified to adjust pin locations. The next time the schematic is opened within the design capture tool, all nets formerly connected to the inverter pin will be uncoupled. This condition will ripple through the schematic netlist to the layout and can cause finished routing to be lost. If the inverter in the central library is renamed or moved, the placed instance on the schematic may be removed and placement, as well as routing, could be lost from the layout.

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