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\item Sistemas de comunicaciones digitales
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\item Sistemas de comunicaciones digitales
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\item Procesamiento de Señales Digitales (DSP)
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\item Procesamiento de Señales Digitales (DSP)
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\item Automoción
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\item Automoción
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\end{itemize}
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\end{itemize}
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A continuación se describe algunas de los desarrollos fabricados por las empresas anteriormente nombradas. De esta manera se pretende dilucidar los perfiles de plataformas y lo que se ofrece en el mercado.
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\subsection{Xilinx Spartan-6 FPGA LX9 MicroBoard}
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\label{sec:placa-xilinx-avnet}
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La plataforma \emph{Spartan-6 FPGA LX9 MicroBoard} ofrece un completo entorno de \textsl{hardware} para que los diseñadores aceleren su tiempo de desarrollo y comercialización. Este kit presenta una estable plataforma para desarrollar y testear diseños de bajo costo/consumo de potencia sobre la familia de FPGA Xilinx Spartan-6. Esta placa contiene las siguientes características\footnote{La características se las describe tal cual las hojas de datos publicadas por los fabricantes, con su idioma original.}.
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\begin{itemize}
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\item FPGA
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\begin{itemize}
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\item Xilinx Spartan-6 XC6SLX9-2CSG324C FPGA
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\end{itemize}
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\item Clocks
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\begin{itemize}
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\item Triple output, user programmable, Texas Instruments CDCE913 clock
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\item Optional user installable Maxim DS1088LU-66+, low-cost, fixed-frequency oscillator
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\end{itemize}
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\item Memory
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\begin{itemize}
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\item 32 Mb x 16 (512 Mb) Micron LPDDR Mobile SDRAM component.
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\item 128 Mb Micron Multi-I/O SPI Flash
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\end{itemize}
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\item Communication
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\begin{itemize}
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\item One USB 2.0, Full Speed USB-to- JTAG bridge via Atmel AT90USB162, Digilent JTAG firmware, and Tyco USB-A connector
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\item One USB 2.0, Full Speed USB-to-UART bridge via Silicon Labs CP2102 and Tyco Micro-B connector.
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\item One 10/100 Ethernet port via National Semiconductor DP83848J PHY and Tyco RJ45 connector with Integrated Magnetics.
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\end{itemize}
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\item User I/O and Expansion Connectors
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\begin{itemize}
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\item Two Digilent 12-pin, 0.245mm pitch, Peripheral Module (PMOD) headers support 3rd party expansion modules.
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\end{itemize}
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\item User Interfaces
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\begin{itemize}
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\item Four user LEDs
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\item Four configurable FPGA user DIP switches
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\item Two system push-button switches: one tied to user I/O and used for logical reset in the factory test image, one hardwired for FPGA program initialization.
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\end{itemize}
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\item Power
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\begin{itemize}
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\item Texas Instruments TPS65708 PMU multi-channel regulator, with 5V input supplied by either USB connection.
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\end{itemize}
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\item Configuration
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\begin{itemize}
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\item 128Mb SPI Configuration Flash
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\item On-board USB Programming/Configuration based on the Digilent USB Full Speed JTAG design utilizing the Atmel AT90USB162
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\item Xilinx Compatible JTAG Cable
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\end{itemize}
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\end{itemize}
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\begin{figure}
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\centering
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\includegraphics[width=0.5\textwidth]{AES-S6MB-LX9}
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\caption{Placa Xilinx Spartan-6 FPGA LX9 MicroBoard.}
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\label{fig:xilinx-avnet-lx9}
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\end{figure}
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\subsection{Altera DE0-Nano}
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\label{sec:altera-de0-nano}
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La placa \emph{DE0-Nano} presenta una plataforma de desarrollo FPGA en un tamaño compacto adecuado para un gran rango de diseños portables, tales como robótica y móviles. EL DE0-Nano es ideal para usar con \textsl{soft processors} embebidos. Esto se debe a las potentes características que presenta con la FPGA Altera Cyclone IV (con 22,230 celdas lógicas), 32MB de SDRAM, 2 Kb de EEPROM, y un dispositivo de memoria de configuración serial de 64Mb. En fin, es un desarrollo completo con todos los recursos físicos necesarios para la evaluación y prueba de sistemas embebidos. A continuación se listan lo que ofrece esta plataforma.
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\begin{itemize}
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\item Featured device
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\begin{itemize}
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\item Altera Cyclone® IV EP4CE22F17C6N FPGA
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\item 153 maximum FPGA I/O pins
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\end{itemize}
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\item Configuration status and set-up elements
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\begin{itemize}
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\item On-board USB-Blaster circuit for programming
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\item Spansion EPCS64
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\end{itemize}
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\item Expansion header
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\begin{itemize}
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\item Two 40-pin Headers (GPIOs) provide 72 I/O pins, 5V power pins, two 3.3V power pins and four ground pins
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\end{itemize}
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\item Memory devices
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\begin{itemize}
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\item 32MB SDRAM
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\item 2Kb I2C EEPROM
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\end{itemize}
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\item General user input/output
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\begin{itemize}
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\item 8 green LEDs
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\item 2 debounced pushbuttons
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\item 4-position DIP switch
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\end{itemize}
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\item G-Sensor
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\begin{itemize}
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\item ADI ADXL345, 3-axis accelerometer with high resolution (13-bit)
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\end{itemize}
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\item A/D Converter
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\begin{itemize}
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\item NS ADC128S022, 8-Channel, 12-bit A/D Converter
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\item 50 Ksps to 200 Ksps
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\end{itemize}
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\item Clock system
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\begin{itemize}
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\item On-board 50MHz clock oscillator
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\end{itemize}
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\item Power Supply
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\begin{itemize}
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\item USB Type mini-AB port (5V)
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\item DC 5V pin for each GPIO header (2 DC 5V pins)
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\item 2-pin external power header (3.6-5.7V)
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\end{itemize}
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\end{itemize}
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\begin{figure}
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\centering
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\includegraphics[width=0.5\textwidth]{de0-nano}
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\caption{Placa DE0-Nano.}
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\label{fig:altera-de0-nano}
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\end{figure}
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\subsection{Digilent Spartan-3 Board}
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\label{sec:digilent-spartan3-board}
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La placa \emph{Spartan-3 Starter Board} proporciona...
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Spartan-3 Starter Board provides a powerful, self-contained development platform for designs targeting the new Spartan-3 FPGA from Xilinx. It features a 200K or 1000K gate Spartan-3, on-board I/O devices, and 1MB fast asyncronous SRAM, making it the perfect platform to experiment with any new design, from a simple logic circuit to an embedded processor core.
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The board also contains a Platform Flash JTAG-programmable ROM, so designs can easily be made non-volatile. The Spartan-3 Starter Board is fully compatible with all versions of the Xilinx ISE tools, including the free WebPack. The board ships with a power supply, and you can add a programming cable at checkout.
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\section{Estructura general del proyecto}
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\section{Estructura general del proyecto}
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\label{sec:estruct-gral}
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\label{sec:estruct-gral}
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