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C0603X5R0J105M030BC_TDK Corporation

来源:LM317 Electronics Components编辑:Crystek Corporation时间:2021-06-14 05:24:58

Both parts come in 48-pin thin quad flat packs. The TLV320AIC10 is priced at $3.75 and the TLV320AIC11 at $4.25 in quantities of 1,000.

This process has been easy up to now because we have just been analyzing our requirements and forgetting about implementation details. However, consider how we interface with the real world. We need to account for things like keypads and screens and, in our mobile phone system, we need to connect to a communications network. This will involve messages and protocols, and we must do things in real time. We can elaborate our analysis model a little further in UML to describe some entities to help us interface with the real world; indeed, UML calls these interface classes.”

However, this is still not sufficient to describe the real-time behavior of the system. For that we must look elsewhere.

C0603X5R0J105M030BC_TDK Corporation

No precise description

UML does not contain any precise way to describe behavior: what happens inside a method or procedure. Of course we can use structured text, but this is only useful as further description. State charts can (and should) be used to show what happens when events occur in our system so that we can analyze sequencing still further.

This helps a little, but again it is just not precise enough to help describe the complete behavior of our system. We cannot, for example, easily (or safely) simulate this. So where can we get help to specify the real-time behavior and can we use this specification to simulate, test and generate 100 percent of our application code?

C0603X5R0J105M030BC_TDK Corporation

Any reasonable workflow demands that we move between phases effortlessly while retaining information consistency. The standardized one-to-one mapping between UML and SDL ensures this, allowing automatic translation of UML class diagrams and state diagrams into SDL. All applicable data in these diagrams-for example, class attributes and methods-are mapped into relevant SDL constructs. This is the first real manifestation of what UML describes as a real-time profile for UML.

The transition of UML to SDL is based on UML stereotypes, tagged values and constraints, so the translation is done according to how the designer wants UML entities mapped onto SDL design constructs. This means the design is created exactly how the designer wants.

C0603X5R0J105M030BC_TDK Corporation

Consistency checking and analysis to design synchronization-ensuring that both analysis and design are equivalent-is possible as the mapping between UML and SDL is one-to-one. What's more, we can convert UML sequence charts into message sequence charts, which we can feed into or compare with the output from our simulation and testing activities.

Once the initial SDL architecture and detailed design have been created from the UML models additional detailed design is added. This may include further definition or decomposition of objects, or creation of new communications paths or signals.

CALL (408) 432-9100www.impweb.comEETInfo No. 602

As I pen these words, I'm in my hotel room in Silicon Valley poised to race down to the studio to host a live one-hour NetSeminar on the role of programmable logic in embedded systems (I hope the camera catches my good side).

At 9:00am Pacific time today (Thursday 19 Jan 2006), Dr. Misha Burich from Altera, Dr. Yankin Tanurhan from Actel, David Steer from ARM, and myself are going to be engaged in a lively one-hour live NetSeminar debate The Role of Programmable Logic in Embedded Systems (I just hope the camera catches my good side).

After the main discussion, you can us in a live Q&A session in which we will be answering your questions and hearing what your colleagues have on their minds. I'm very much looking forward to seeing you there!

WASHINGTON — Infineon Technologies AG's first 300-mm wafer production fab will be an expansion of the ProMOS joint venture fab in Taiwan with Mosel-Vitelic, an official of the Taiwanese chip maker confirmed today.

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