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Using a West Bridge to integrate High Speed USB

Posted: 14 May 2010     Print Version  Bookmark and Share

Keywords:high speed USB  MCU based designs  West Bridge USB 

Many legacy data loggers, such as medical health monitor devices and 8/16bit MCU-based designs intended for sampling various sensors data, use UART/LPT for communicating to PC, with the PC running a specific application to analyse the data. The primary reason for this shift is data rate.

For a sensor data logging application, a slow interface rate and single bus line can result in hours of time to read data even a single day's data over USB from storage.

Since the birth of USB, serial interfaces like PS/2 and UART are being phased out by USB. The rapid growth of the mobile and embedded device market demands new features and capabilities such as High-Speed USB connectivity, support for the latest mass storage devices, and access to higher storage capacity.

To implement High-Speed USB and mass storage access in products like data loggers and 8/16 MCU-based designs, there are two approaches: using a single-chip, high-end processor or keeping the existing design architecture intact and introducing USB and storage through a bridge controller.

The key factors to keep in mind while comparing these approaches are feasibility, performance, cost, design/development effort and time-to-market.

View the PDF document for more information.

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