1 document strategy – Cirrus Logic AN298 User Manual
Page 2
2
AN298RC14
1 Document Strategy
1 Document Strategy
The CS485xx has been designed with an inherent flexibility in terms of firmware usage. Each instance of operation of the
CS485xx can potentially use a different mix of DSP firmware depending on the need of the end user. As such, the strategy
adopted to document the various DSP firmware is based on a single General Overview coupled with an individual
Firmware User’s Manual for each DSP firmware module offered by Cirrus Logic. AN298 is the General Overview to the
family of CS485xx Firmware User’s Manuals.
The individual Firmware User’s Manuals, mentioned in the above paragraph, each follow as an extension of AN298. These
manuals have been named in such a way so as to classify them into one of the following categories:
•
Operating System and General Overview
•
Matrix Processing Module (MPM)
•
Virtual Processing Module (VPM)
•
Post Processing Module (PPM)
Furthermore, since each classification (e.g., Post Processing Module) may contain several associated DSP firmware, an
incremental letter assignment (e.g., A, B, C etc.) was given to index each DSP firmware within a given category. As an
example, the table below outlines the general naming conventions for several firmware modules.
For a further breakdown of the available CS485xx firmware modules and their respective Firmware User’s Guide
document number, see
. For the latest code updates and availability, contact your local field applications
engineer (FAE).
Table 1-1. Naming Conventions
DSP Firmware Module
Base Name
Overlay Type
Index
Reference Number
General Overview, Operating System & Common
Firmware Modules
AN298
(General)
-
AN298
Delay Module
AN298
Post Processing Module (PPM)
a
AN298PPMA
Crossbar Mixer Module
AN298
Matrix Processing Module (MPM)
c
AN298MPMC
Dolby Headphone 2
AN298
Virtual Processing Module (VPM)
a
AN298VPMA