www.oasis.com
OASIS SiliconSystems AG
Bannwaldallee 48
D-76185 Karlsruhe
GERMANY
Tel: +49 (0) 7 21 6 25 37 - 0
Fax: +49 (0) 7 21 6 25 37 - 1 19
E-mail: OSS@oasis.de
OASIS SiliconSystems, Inc.
1120 South Capital of Tx Hwy.
Building 2, Suite 100
Austin, Texas 78746, USA
Tel: +1 (512) 306 8450
Fax: +1 (512) 306 8442
E-mail:
OSS
@oasis.com
OASIS SiliconSystems, Inc.
38600 Van Dyke Avenue
Suite 220, Sterling Heights,
Michigan 48312-1172, USA
Tel: +1 (586) 7 95 05 45
Fax: +1 (586) 7 95 89 50
E-mail: Detroit@oasis.com
OASIS SiliconSystems KK
Shin-Yokohama UU Bld. 5F
2-5-2 Shin-Yokohama, Kohoku-ku
Yokohama, 222-0033, JAPAN
Tel: +81-45-470-2240
Fax: +81-45-470-2242
E-mail: Japan@oasis.com
Amplifier Controller 4 MOST
Amplifier Controller for Low/Mid and High End Applications
Features
8 Channel processing:
4 High Quality Output Channels via
DACs
4 Output Channels via standard PCM
Interface for external DACs
2 PWM DAC outputs
Stereo Audio ADC
Microphone ADC
Basic Audio Processing: Volume, Fade,
Tone Control
Internal Watchdog Timer
Serial Interface
MOST Network Interface
Built-in Network Management Software
Integrated Flash Handler for updates to
future MOST NetServices Versions
3.3V power supply
Standard 128-pin MQFP Package
Description
This Amplifier Processor demonstrates the flexi-
bility and cost effectiveness of the OS8805
Series. The amplifier chip does all the process-
ing necessary to
transport audio in-
formation between
a MOST Network
and external ampli-
fier hardware.
The controller in-
cludes a MOST
Network interface,
a microcontroller,
two DSPs, 128K of
internal FLASH
memory, and sev-
eral A/D and D/A
converters. There
are analog inputs
for one stereo sig-
nal and an electret microphone. The processor
provides digital sound processing for ten inde-
pendent output audio streams.
The integrated MOST NetServices provide the
software services needed to communicate with
other MOST devices.
The design is
modular so that
functions can be
easily added or re-
moved. It is pos-
sible to add pro-
cessing blocks to
the software func-
tions so that new
algorithms can be
implemented. Soft-
ware updates can
be flashed into the
controller over the
MOST Network.
As an application
example for the
Amplifier Controller an amplifier protyping de-
vice is available from OASIS SiliconSystems.
Preliminary
8 Channel Power Amplifier 4 MOST
Amplifier Controller 4 MOST
Amplifier Controller for Low/Mid and High End Applications
Hardware Features
The functions integrated into the controller allow for a
compact design where the majority of functions are imple-
mented within a single chip.
The following hardware functions are included:
Line Level Outputs for Active Speakers
Stereo Line Input for an external Audio Source
Microphone Input for Speech and ambient Noise
Input
Network updateable FLASH Memory to store
Amplifier parameters
Updating to future MOST NetServices Versions
possible
Software Features
The controller includes OASIS' MOST NetServices soft-
ware needed to connect to a MOST network and to inter-
act with other MOST devices.
The following audio processing functions are included:
Source Level Matching
Volume Control (Volume, Balance, Fade)
Intelligent Mute
Tone Control
Loudness (Bass Boost)
Graphic Equalizer
Dynamic Compression
Delay (Option)
Mixing of Audio Channels
The controller is easily adaptable for different amplifier
configurations, such as differing numbers of speakers and
different default equalization values. The software can be
extended with additional parameters and functions which
can be flashed into the controller over the MOST Net-
work.
Application Example of an Eight Channel Power Amplifier
1) Power amplifier
2) Line output amplifier
3) Differential input amplifier
Disclaimer: All information in this document is preliminary and may be subject to changes!
All trademarks used in this document are proprietary of their respective owners
PFL_Amp_Contr-0V0-2.pmd
04/03
MOST and OptoLyzer are registered trademarks of Oasis SiliconSystems
2002-2003 OASIS SiliconSystems, all rights reserved
Clock
Circuit
Bias
Circuit
FOT
Unit
Feature
Connector
128k
Delay
RAM
Stereo
DAC
Stereo
DAC
Host
Controller
G P
Timer
Memory
Controller
GPIO
DC
ADCs
MOST
Network
Filter
Async.
Source
Port
MOST NIC
PLL &
Clock
Manager
Source
Ports
MIC &
MPX ADC
Async.
Source
Port
DSP 1
Quad
DACs
PWM
DACs
1)
1)
1)
1)
2)
2)
1)
1)
3)
3)
Debug
Port
Control
Port
DSP 0
1)
1)
Audio
ADCs
3)
Amplifier Controller
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