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Mini-FlexBus EBI for ColdFire MCUs

Posted: 08 May 2009     Print Version  Bookmark and Share

Keywords:MCF5225x  ColdFire  Mini-FlexBus 

Freescale's ColdFire microcontrollers are available in a range of small form factors. In most cases, on-chip memory provides ample room for the application, with the option to expand functionality with simple, serially-interfaced memories and/or peripherals. In some cases, however, serially-interfaced devices cannot provide the performance or memory capacity needed.

The Mini-FlexBus is an external bus interface (EBI) for MCUs that typically use internal memory, but need expandability. The bus interface minimises package pinouts, while maintaining a high level of configurability and functionality.

The MCF5225x family of ColdFire microcontrollers is the first to include the Mini-FlexBus, and is the focus of this application note. This application note describes how to set up and use the Mini-FlexBus on the MCF5225x and shows some implementation examples. The M52259EVB evaluation board takes advantage of one of these examples and can be used as a reference. Although the focus of the application note is the MCF5225x family, the information contained herein will also apply to future devices with the Mini-FlexBus.

View the PDF document for more information.

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