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| 型號(hào)： | CX24943 |
| 英文描述： | Telecommunication IC |
| 中文描述： | 通信集成電路 |
| 文件頁(yè)數(shù)： | 4/4頁(yè) |
| 文件大?。?/td> | 609K |
| 代理商： | CX24943 |
f e a t u r e s a n d s p e c i f i c a t i o n s
Cable PHY Downstream
10-bit A/D
Direct IF sampling at 44 and 36 MHz
16/256 QAM Demodulator
Programmable equalization
Annex A and B FEC
Cable PHY Upstream
11-bit D/A
QPSK/16 QAM burst modulator
Programmable pre-equalization
DMA Interrupt Controller
16 asynchronous channels
Memory to memory moves:
aligned/unaligned
Source/destination mode for
simple data transfer
Circular/linked buffer support
for inbound/outbound data
Peripheral I/O
32 GPIO
JTAG boundary scan
UART
Cable MAC Network Processor
Software Programmable
– DOCSIS 1.0/1.1 compliant
– EuroDOCSIS 1.0/1.1 compliant
– DVB compliant
– Fixed wireless compliant
– Proprietary standards
Application Network Processor
ARM940T microcontroller
Up to 225 MHz operation
4KB Instruction and 4KB Data Cache
Embedded ICE and debug extensions
PID, SID, DA/SA, MAC, IP and
LLC Filtering
Four 56-bit DES/CRC engines
HCS 16- and 32-bit CRC
ingle-cycle engines
MII
IEEE 802.3 MAC layer
Networking technologies
–
10/100 Ethernet
–
Conexant HPNA 2.0
–
Conexant HomePlug 1.0
Host Interface
Master mode
–
16-bit data
–
8-chip selects
Supports Flash, IP telephony,
IEEE 802.11a or IEEE 802.11b
16/32-bit Slave mode (external
host and test)
USB 1.1
Integrated 12 Mb transceiver
Communications Peripheral device
Memory
Internal 8 K x 32 SRAM
External SDRAM Interface
–
16-bit interface
–
Supports both 4 MB and
8 MB technologies
Phase-Locked Loops (4)
TDM clock and frame sync generator
Transmit clock generator
Supplied 25MHz Ethernet
reference clock
Internal USB clock
Miscellaneous Functions
Watchdog Timer
Four additional timers
Interrupt controller
Package and Power
228 PBGA
All I/O at 3.3V
Power supply: 3.3V and 1.2V
<500 mW (typical)
Reference Designs
DOCSIS 1.0/1.1
EuroDOCSIS 1.0/1.1
PCI
Product Applications
(DOCSIS/EuroDOCSIS 1.0/1.1,
DVB, Proprietary)
Cable Modems with Ethernet
Cable Modems with USB
Cable Modems with IP Telephony
PCI Cable Modem Card Internal (CMCI)
Cable Modem with Home Networking
PCMCIA Cable Modem
Digital Set-Top Box with Cable Modem
www.conexant.com
General Information:
U.S. and Canada: (800) 854-8099
International: (949) 483-6996
Headquarters
–
Newport Beach
4311 Jamboree Rd, PO. Box C
Newport Beach, CA 92660-3095
Order# 101645B
01-0430
2001, Conexant Systems, Inc. All Rights Reserved.
Conexant and the Conexant logo are trademarks
of Conexant Systems, Inc. Other trademarks are
owned by their respective owners. Although Conexant
strives for accuracy in all its publications, this material
may contain errors or omissions and is subject to
change without notice.
THIS MATERIAL IS PROVIDED AS IS
AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES,
INCLUDING MERCHANTABILITY, FITNESS FOR A PARTICULAR
PURPOSE AND NON-INFRINGEMENT.
Conexant shall not be
liable for any special, indirect, incidental or consequential
damages as a result of its use.
Product Features
High Flexibility
Cable modem manufacturers have to devote a significant
amount of resources to bring new certifiable solutions to
market. The unique architecture of the CX24943 provides a
number of advantages for cable modem manufacturers and
cable operators alike. The software programmability of the
dual network-processing engine allows manufacturers to
customize the CX24943 for application specific requirements,
both at the cable MAC and software applications layer.
This feature allows one base platform to support numerous
products, including IP telephony, home networking and
set-top box as shown in the CX24943-based Cable Modem
block diagram. In addition, the architectural similarities
between the CX24943 and its predecessor, the CN9414,
allows for maximum reuse of certified code.
The CX24943 provides the option to adapt to a multitude
of standards by downloading different software into the
embedded dual network-processing engine, including
DOCSIS/EuroDOCSIS 1.0/1.1, DVB and proprietary standards.
Finally, cable operators can download feature enhancements
to field-deployed solutions, minimizing truck rolls and
equipment obsolescence.
Complete Solution
To reduce the resources and development time required
to bring CX24943-based cable modem solutions to market,
Conexant provides complete certifiable DOCSlS/EuroDOCSIS
1.0/1.1 Cable Modem Reference Designs. The Cable Modem
Reference Designs include software that is not only compliant
to DOCSIS/EuroDOCSIS 1.0/1.1 and meet the network
requirements of @Home, but also include the USB drivers
that meet Microsoft
’
s Windows Hardware Quality Lab (WHQL)
requirements. Additional software enhancements that are
above and beyond standards-based requirements are also
included in this complete software offering.
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