Description

The controller includes a MOST network interface, a micro-controller, two DSPs, internal flash memory, and several A/D and D/A converters. There are analog inputs for one stereo signal and an electret microphone.

The controller built into the amplifier provides digital sound processing for eight independent output audio streams. The amplifier can be used in different listening environments. The available parameters can be set by sending Control Messages over the MOST network.

The integrated MOST NetServices provide the software services needed to communicate with other MOST devices. The amplifier is optimized relating to cost, size, EMC performance and operation in an automotive environment. Amplifier 4 MOST is part of a collection of devices based on application specific media controllers that are available from SMSC to quickly get started with the implementation of MOST devices.

Hardware

The functions integrated into the Amplifier 4 MOST allow for a compact design where the majority of functions are implemented within a single chip. Only a few peripheral components are added to provide power amplifiers. The Amplifier 4 MOST includes the following hardware functions:

• Eight channels with total 250 W
• Up to 40W per channel into 2 Ohm speakers
• Line level outputs for active speakers
• MOST fiber optic network interface
• Stereo line input for an external audio source
• Microphone input for speech and ambient noise
• Expansion header for additional signal-processing such as MP3, Dolby Digital, Dolby AC3, Dolby ProLogic, DTS,THX .....
• Flash memory to store amplifier parameters via the MOST network
• Updating to future MOST NetServices versions possible

Software

The Amplifier 4 MOST includes SMSC's MOST NetServices software needed to connect to a MOST network and to interact with other MOST devices. The following audio processing functions are included:

• Source level matching
• Volume control (volume, balance, fade)
• Intelligent mute
• Tone control
• 5 Band graphic equalizer
• Dynamic compression

Dimensions

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Block Diagram

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