Electronics News
Archive : 24 April 2008 год
The Xilinx Virtex-5 FXT platform delivers FPGAs to provide two industry-standard PowerPC 440 processor blocks. Each processor, with integrated 32KB instruction and 32KB data caches, delivers up to 1,100 DMIPS at 550 MHz. Tightly coupled to each PowerPC 440 core is a new integrated 5x2 cross bar processor interconnect architecture and DMA controllers that provide simultaneous access to I/O and memory. In addition, the enhanced high-performance Auxiliary Processor Control Unit (APU) provides added connectivity for dedicated co-processing engines or custom user defined instructions in applications such as video processing, 3D data processing and floating-point math.
LynuxWorks' BlueCat Linux is an implementation of the 2.6 Linux kernel, which supports microprocessor control and is enhanced for use in a wide array of embedded systems, from small consumer devices to large-scale, multi-CPU systems. BlueCat Linux offers the flexibility of open-source software that leverages the Linux model and extends developers' investment by providing a simple path to migrate to real-time, deterministic performance There are many embedded systems based on the Power Architecture running BlueCat Linux, from unmanned vehicles through to Navy Warships, wired and wireless routers through to next generation of consumer audio/visual devices. The LynxOS family of operating systems also offer support for the Power Architecture 440, and provide a range of reliable, high performance open-standards that are also safety and security certifiable.
AnalogicTech’s AAT1153 is a 1.2MHz constant frequency, current mode step-down converter capable of delivering up to 2A of output current. It is available in a 3x3mm TDFN package. The device supplies up to 2A output current from a 2.5V to 5.5V input. Output voltage can range from 0.6V to VIN. Current mode operation offers excellent line and load transient response. The step-down converter extends battery life by running at efficiency levels as high as 95% and can achieve 90% efficiency at its full rated 2A load. It also uses low RDS (ON) internal switches that can run at 100% duty-cycle for low-dropout operation. In addition, light load operation minimises output ripple for noise sensitive applications.
Using a 1.2MHz constant switching frequency, the AAT1153 allows designers to use small external components including lower cost ceramic capacitors. The internal slope compensation setting helps minimise system footprint by allowing the designer to use smaller inductor values. The AAT1153 offers both short-circuit and over-temperature protection. Soft start circuitry limits current surge at input and eliminates output voltage overshoot. It also offers a low shutdown current of less than 1microA. Qualified across the -40 C to +85 C temperature range, the AAT1153 is available in a Pb-free, 10-lead 3x3mm TDFN package.