Specifications

7
Modems|
networking and Ethernet — into one robust solution that can
support any combination of the four functions concurrently. This
solution lets OEMs use just one PCI slot to support all communication
needs in the PC.
Our industry leadership has enabled us to bring the first such
combination solution to the marketplace. Conexant is a member
of the DSL Forum, which supports interoperability. Our V.90/V.92
technology is the leading 56 KBps technology in the world.
We are a founding member of HomePNA, an industry group
spearheading efforts to create standards-based products for
easy-to-use, reliable and affordable home connectivity.
Conexant’s SuperComms™ Architecture
This solution is based on Conexant’s SuperComms architecture,
which enables board manufacturers and PC OEMs to combine
communications functions in a single board. The SuperComms
architecture uses a PCI bus interface, buffering and an arbiter
to manage all the interrupt handling for ADSL, V.92 modem
connectivity, HomePNA, and Ethernet operations.
PCI Controller
Conexant’s P51 PCI controller is a bridge between the PCI bus
and the other devices. It integrates the system-side device for
V.92, DSL interfaces, and incorporates 2 MACS for HomePNA
and Emulated Local Area Network (ELAN). The P51 complies
with the PCI 2.2 specification and supports power management.
DMT Datapump
The CX11627 DMT datapump is a DSP that complies with
T1.413 Issue 2, G.992.1 and G.992.2. The device performs DMT
modulation/demodulation, TC, forward error correction (FEC),
encoding/decoding, data synchronization and data interleaving.
The software drivers enable the host PC to control and initialize
the datapump.
Analog Front End
The CX20431 AFE is designed for use in full rate and G.lite ADSL
modems. The receive path filters out unwanted echo and boosts
the wanted signal before performing an A/D conversion. The
transmit path converts digital data-to-analog signals and performs
a smoothing operation before presenting the signals to the
line driver.
Line Driver
The integrated CX20441 line driver is more cost effective and
power sensitive than a discrete solution, and is optimized for
full rate and G.lite ADSL modems. It has high bandwidth, low
noise and superior linearity.
HomePNA 1.0 or 2.0 Physical-Layer Analog Front End
The combo modem supports either of the specifications proposed
by the HomePNA 1.0 (1 Mbps) or HomePNA 2.0 (10 Mbps). The
phoneline network is an Ethernet-compatible LAN that uses
existing telephone wiring to link computers and devices without
interrupting phone service. Products that comply with these
specifications and combine home networking with high-speed
Internet access will enable users to enjoy networked gaming and
share peripherals, files, applications and Internet access over one
phoneline. Appliances such as digital TV Set-Top Boxes, Internet
phones and digital cameras also can be connected via phoneline.
V.92 Modem with SmartDAA™
The V.90/V.92 data modem receives data at up to 56 KBps,
and sends at up to V.34 rates. A V.80 synchronous access mode
supports host-controlled communication protocols with H.324
support. The modem solutions also features Wake-on-Ring,
Caller ID detection, and digital PBX line protection.
Our silicon Data Access Arrangement (DAA) solution, SmartDAA,
replaces a portion of the DAA segment of a modem or other
communications device, and provides all of the interface circuitry,
off-hook relay, loop current holding, impedance matching and
ring detection needed for a complete solution. It is designed to
meet domestic and international line-interface requirements.
Based on Conexant’s patented Digital Isolation Barrier (DIB)
technology, this silicon DAA product eliminates the need
for the costly analog transformers, relay and opto-isolators
that are typically used in discrete DAA implementations.
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AccessRunner ADSL/V.92/HomePNA 2.0/
Ethernet-PCI modem device set diagram
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