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參數(shù)資料
| 型號： | AD1815 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | SoundComm Controller(SoundComm 控制器) |
| 中文描述： | SoundComm控制器（SoundComm控制器） |
| 文件頁數(shù)： | 16/44頁 |
| 文件大?。?/td> | 426K |
| 代理商： | AD1815 |
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AD1815
–16–
REV. 0
Telephony Modem Support
AD1815 contains a V.34 capable analog front end for support-
ing host-based and data pump modems. T he modem DAC
typical dynamic range is 90 dB over a 4.2 kHz analog output
passband. In modem mode, the right channel of the ADC and a
dedicated DAC convert modem data at the same sample rate in
the range between 4 kHz and 13.8 kHz. All programmed sample
rates have a 1 Hz resolution. T he AD1815 also supports the fol-
lowing irrational V.34 sample rates:
8/7
×
7,200 Hz, 8/7
×
9,000 Hz, and 8/7
×
12,000 Hz
For native modem applications, all modem processing is
handled by the host and all data is transferred by PIO over the
ISA interface through a 4 deep FIFO.
For modem applications using a dedicated data pump, a bi-
directional DSP serial port interfaces directly to the data pump.
WSS & SoundBlaster Compatibility
Windows Sound System software audio compatibility is built
into the AD1815.
SoundBlaster emulation is provided through the SoundBlaster
register set and the internal music synthesizer. SoundBlaster Pro
version 2.01 functions are supported including record and Cre-
ative SoundBlaster ADPCM.
Virtually all applications developed for SoundBlaster, Windows
Sound System, AdLib, and MIDI MPU-401 platforms run on
the AD1815 SoundComm Controller. Follow the same develop-
ment process for the controller as you would use for these other
devices. T his section provides information on related develop-
ment kits, hardware/software specifications, and reference texts.
As the AD1815 contains SoundBlaster (compatible) and
Windows Sound System logical devices. Y ou may find the fol-
lowing related development kits useful when developing AD1815
applications.
Developer Kit for SoundBlaster Series
, 2nd ed. 1993,
Creative Labs, Inc., 1901 McCarthy Blvd., Milpitas, CA 95035
Microsoft Windows Sound System Driver Development Kit
(
CD
),
Version 2.0, 1993, Microsoft Corp., One Microsoft Way,
Redmond, WA 98052
Because the AD1815 complies with the following related
specifications, you can use them as an additional reference to
AD1815 operations beyond the material in this data sheet.
Plug & Play ISA Specification, Version 1.0a
, 1993, 1994,
Intel Corp. & Microsoft Corp., One Microsoft Way,
Redmond, WA 98052
Multimedia PC Level 2 Specification
, 1993, Multimedia PC
Marketing Council, 1730 M St. NW, Suite 707, Washington,
DC 20036
MIDI 1.0 Detailed Specification & Standard MIDI Files 1.0,
1994, MIDI Manufacturers Association, PO Box 3173
La Habra, CA 90632-3173
Recommendation G.711-Pulse Code Modulation (PCM) Of Voice
Frequencies
(
μ
-Law & A-Law Companding), T he International
T elegraph and T elephone Consultative Committee IX Plenary
Assembly Blue Book, Volume III - Fascicle III.4, General
Aspects Of Digital T ransmission Systems; T erminal Equip-
ment’s, Recommendations G.700 - G.795, (Geneva, 1988),
ISBN 92-61-03341-5
IMA Digital Audio Doc-Pac
(IMA-ADPCM), 1992, Inter-
active Multimedia Association, 48 Maryland Avenue, Suite
202, Annapolis, MD 21401-8011
T he following reference texts can serve as additional sources of
information on developing applications that run on the
AD1815.
S. De Furia & J. Scacciaferro,
The MIDI Implementation Book
,
(1986, T hird Earth, Pompton Lake)
C. Petzold,
Programming Windows: the Microsoft guide to writ-
ing applications for Windows 3.1
, 3rd. ed., (1992, Microsoft
Press, Redmond)
K . Pohlmann,
Principles of Digital Audio
, (1989, Sams,
Indianapolis)
A. Stolz,
The SoundBlaster Book
, (1993, Abacaus, Grand
Rapids)
J. Strawn,
Digital Audio Engineering
,
An Anthology
, (1985,
K aufmann, Los Altos)
Yamamoto,
MIDI Guidebook
, 4th. ed., (1987, 1989,
Roland Corp.)
Multimedia PC Capabilities
T he AD1815 is MPC-2 and MPC-3 compliant. T his compli-
ance is achieved through the AD1815’s flexible mixer and the
embedded chip resources.
Music Synthesis
T he AD1815 includes an embedded music synthesizer that
emulates industry standard OPL3 FM synthesizer chips and
deliver 20 voice polyphony. T he internal synthesizer generates
digital music data at 22.05 kHz and is summed into the DACs
digital data stream prior to conversion. T o sum synthesizer data
with the ADC output, the ADC must be programmed for a
22.05 kHz sample rate.
T he synthesizer is a hardware
implementation of Eusyhth-1 +
code that was developed by
Euphonics, a research and devel-
opment company that specializes
in audio processing and electronic
music synthesis.
EuSynth-1+
Wavetable MIDI Inputs
T he AD1815 has a dedicated analog input for receiving an ana-
log wavetable synthesizer output. Alternatively, a wavetable
synthesizer’s I
2
S formatted digital output can be directly con-
nected to one of the AD1815’s I
2
S serial ports. Digital wave-
table data from the AD1815’s I
2
S port can be summed with
other digital data streams being handled by the AD1815 and
then sent to the 16-bit
Σ
DAC.
MIDI
T he primary interface for communicating MIDI data to and
from the host PC is the compatible MPU-401 interface that op-
erates in UART mode. T he MPU-401 interface has two built-in
FIFOs: a 64 byte receive FIFO and a 16 byte transmit FIFO.
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| AD1815JS | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Analog Devices 功能描述: |
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