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| 型号： | DSRT-L030-011 |
| 厂商： | CONEXANT SYSTEMS |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, XMA |
| 文件页数： | 2/86页 |
| 文件大小： | 667K |
| 代理商： | DSRT-L030-011 |
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RipTide PCI Audio/Comm Device Family Product Description
10
ROCKWELL PROPRIETARY INFORMATION
1167
3.3.1.3
DSP-Based Signal Processing Modem Software (RC56HCF Architecture)
If the optional Modem DSP is installed, modem controller functionality is provided by software similar to the Rockwell
RC56HCF-PCI Host-Controlled V.90/K56flex Modem Device Family and modem signal processing is performed in DSP-
based hardware.
Modem Controller Software. Modem controller VxD RAM modules are loaded dynamically as required depending upon
communications mode, e.g., V.90, K56flex, or V.34. By treating functionality as discrete objects, modem controller features
can easily be revised or updated without affecting the functionality of the rest of the modem. Modes are controlled and
processed in response to V.25 ter and other AT-style commands and S parameters as defined in the RC56HCF Command
Reference Manual (Order No. 1118).
Data Pump Abstraction Layer. A Data Pump Abstraction Layer VxD (DPAL.VxD) is used to download DSP signal
processing code to the DSP depending upon selected communications mode. Downloadable DSP code allows DSP signal
processing revisions and upgrades to be easily implemented.
DSP-Based Signal Processing and Hardware Driver. Modulation/demodulation functions are performed by the DSP
hardware.
Codec hardware driver functions are performed in the DSP.
3.3.1.4
MMX-Based Signal Processing Modem Software (SoftK56 Architecture)
If the optional Modem DSP is not installed, modem controller functionality is provided by software similar to the Rockwell
SoftK56 V.90/K56flex Modem and modem signal processing is performed in MMX-based software.
Modem Controller Software. Modem controller VxDs are loaded dynamically as required depending upon communications
mode, e.g., V.90, K56flex, or V.34. By treating functionality as discrete objects, modem control features can easily be revised
or updated without affecting the functionality of the rest of the modem. Communication modes are controlled and processed
in response to V.25 ter and other AT-style commands and S parameters as defined in the SoftK56 Command Reference
Manual (Order No. 1163).
MMX-Based Signal Processing and Hardware Driver Software. The heart of the SoftK56 specific code is the Modem
Engine/Data Pump layer and Hardware Driver.
The SoftK56 Modem Engine includes Advanced Modem Operations Scheduler (AMOS) which is Rockwell’s state-of-the-art
system software architecture. The software scheduler core dynamic loads signal processing VxDs on an as-needed basis
depending on communication mode thus optimizing the system RAM utilization. Incremental value-added functionality is
easily implemented as a new “ signal processing object” without extensive system retest, simply by installing an additional
VxD driver. In addition, remote troubleshooting is enabled using simple application utilities written around Rockwell’s
exclusive modem monitoring engine.
The Data Pump code layer provides the data and fax modulation protocol code to process the data samples delivered by the
Codec hardware. Advanced algorithmic techniques overcome most common PC system limitations, including interrupt latency
and bus latency. The design is tolerant to interrupt latencies exceeding 20 milliseconds while utilizing less than 50 MHz of
CPU capacity.
Codec hardware driver functions are performed in software.
3.3.2
Modem Features
The following modem features are supported by both MMX-based and DSP-based modem signal processing unless
otherwise stated.
3.3.2.1
V.90 and K56flex Data Modes
As a V.90/K56flex
data modem, the modem can receive data from a digital source using a V.90 or K56flex-compatible
central site modem over the digital telephone network portion of the PSTN at line speeds up to 56 kbps. Asymmetrical data
transmission supports sending data up to V.34 rates. This mode can fallback to full-duplex V.34 mode, and to slower rates as
supported by line conditions.
As a V.34 data modem, the modem can also operate in 2-wire, full-duplex, asynchronous mode at line rates up to 33600 bps.
Data modem modes perform complete handshake and data rate negotiations. Using V.34 modulation to optimize modem
configuration for line conditions, the modem can connect at the highest data rate that the channel can support from 33600
bps to 2400 bps with automatic fallback. Automode operation from V.90, V.34, and V.32 bis is provided. All tone and pattern
detection functions required by the applicable ITU or Bell standard are supported.
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| DSR-TSS-ST2-1 | 制造商:DOMINANT 制造商全称:DOMINANT Semiconductors 功能描述:Right Angle LED |
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