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 人参与 | 时间:2021-06-20 01:51:18

The earlier synopsis of the evolution of DRC gave several examples of functionality added to reduce DRC runtimes. While shortening DRC runtime will shorten the time to tape-out, the result of this evolution of DRC applications does more than just reduce DRC runtime.

Figure 2: Software Architecture

TI's Consumer Electronics Station Development Kit (CE-STA-DK) for WLAN integration has been assembled to address all of these issues:

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Flexible WLAN Driver Architecture A flexible and full-featured WLAN driver architecture shortens the development cycle for integrating the driver into a host system. The TI WLAN driver architecture consists of the following four main modules:

Inter Process Communications (IPC)The IPC, which is also referred to as the User Space, facilitates communication between a developer and the WLAN driver's kernel.

Utility AdapterThe Utility Adapter supports an API that simplifies interaction with the driver for developers. This API can be used to configure the WLAN driver's security mode.

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Supplicant/SecurityThe WLAN driver's Supplicant contains the security engine that controls the various security modes and protocols.

OS Abstraction Layer The OS Abstraction Layer (OAL) implements functions that cross over various modules in the driver platform. In addition, the OAL simplifies the porting of the WLAN driver to other OSs.

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Development Environment and ToolsTools are essential so developers can easily modify the WLAN driver to blend it into the host system's software environment and to add customized capabilities such as security options and protocols. TI's driver for its WLAN chipset solutions comes with several tools for developers, including the previously mentioned API, a Configuration Utility (CU) and several utilities for porting the driver to other OSs besides Linux and for porting TI's high-speed VLYNQ interface to the host system. The VLYNQ interface is present on the DaVinci and DM processors, providing a direct high-speed connection between the WLAN chipset and the host processor.

Application Programmers Interface (API) TI's WLAN driver's API simplifies several functions, such as establishing a security mode for the platform, configuring the driver to work with the latest security protocols and defining general connection settings.

To do so it no longer connects only to the cellular telephone network. It probably also connects into wireless LANs and communicates to your PC or wireless headset using Bluetooth technology. And all this extra functionality still has to be powered from a battery pack.

For the first few generations of mobile phone, advances in silicon chip and battery technology resulted in increasing talk and standby times. More efficient RF power amplifiers and new CMOS logic chips consumed less power than their predecessors.

Advances in RF signal processing and digital signal processing algorithms reduced power consumption even further. At the same time, new battery technologies, notably the development of advanced lithium ion batteries with very high storage densities, made more power available.

Today, the situation has changed. While the latest deep sub-micron CMOS processes are the essential enabler of much higher functional integration, their upward scaling in integration density has not been matched by an equivalent downward scaling in power consumption as was the case for previous CMOS generations.

More functionality therefore involves additional power consumption that can no longer be offset by CMOS process technology improvements. There have been no compensating improvements in battery technology.

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