March 2, 1998
Cover Story
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Intelligent I/O: Does I2O hold H2O?
By offloading interrupt and bus-traffic overhead caused by standard I/O operations,
intelligent I/O subsystems allow host CPUs to support more users or transactions. Now, the
I2O initiative seeks to make such subsystems both OS- and hardware-independent,
leading to widespread deployment.
--Maury Wright, Technical Editor
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Design Features
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Microprocessor and DSP technologies unite for
embedded applications
Many embedded applications require a mixture of µP and DSP functionality;
semiconductor vendors are creating hybrid devices to handle both types of processing.
Before you begin your next design with discrete µP and DSP devices, check out the
benefits and limitations that these hybrid devices offer.
--Markus Levy, Technical Editor
Frame grabbers get the picture when video
cameras fall short
Even when digital video cameras do away with frame grabbers' ADCs, capture boards
remain vital in real-time industrial imaging.
--Dan Strassberg, Senior Technical Editor
Interfacing HDLs with conventional programming
languages
Programming languages that interface with HDL models facilitate hardware/software
codesign. This interface technique--along with a practical example using a VHDL behavioral
model of a memory-copier device in a C-based application--helps you with this codesign.
--Francisco Mora and Andres Torrubia, Polytechnic University of
Valencia
DSP IC's clock oscillator uses inexpensive
crystals
Circuit tricks eliminate a DSP chip's need for expensive, low-ESR crystals.
--Sergey Dickey, Dynamic Telecommunications Inc
Designing with op amps: Single-formula
technique keeps it simple
A simple single-op-amp design technique uses one formula--RF/|gain|--for
both positive and negative gains. The procedure works for all gain settings and produces
designs with minimal bias-current error.
--Dieter Knollman, PhD, Lucent Technologies
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Leading Edge
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