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Siemens AG Semiconductors
Version 5.2
Confidential
20/10/1998
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Figure 1 depicts an example minimum cost MultiMediaCard audio system.
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This document is a design reference for the VLSI engineers who implement ROSA and the software
engineers who design and implement the CPU code that drives and controls ROSA. It may also be
used as a reference guide for the development of MultiMediaCard systems not using ROSA.
The first chapter is a brief introduction to ROSA and its possible applications. The second chapter
provides an overview of the operation and performance of ROSA. Chapter 3 describes the different
bus interfaces of ROSA. Chapter 4 specifies the internal architecture, unit by unit. Chapter 5
describes the Macro commands. Chapter 6 defines ROSA’s flexibility and configuration capabilities.
Chapter 7 provides the electrical datasheet. Several appendices suggest how to setup some popu-
lar MultiMediaCard systems such that they efficiently operate along with ROSA.
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External signals: capital, bold letters (e.g.,
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Internal signals: xxx (e.g., rcad_ab)
Active-low mark: _n (e.g., reset_n,
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Internal units: capital (non-bold) letters (e.g., ECC)
Internal modules: common_module (e.g., rosa_if)
ROSA
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MultiMediaCard bus
parallel IF
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