Datasheet > AR-P48

AR-P48

更新时间： 2024-11-25 22:05:51

品牌	Logo	应用领域
科胜讯 - CONEXANT		调制解调器 PC
页数	文件大小	规格书
24页	159K
描述
AccessRunner ADSL Modem Device Set for PCI Applications

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中文翻译

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AR-P48 数据手册

AccessRunner

ADSL Modem Device Set for PCI Applications

Controller-less, Scalable, Discrete Multitone-based, G.dmt- and G.lite-

compliant, ADSL Modem Device Set for PCI Applications

Conexant’s AccessRunner ADSL modem device set is compliant

with the full-rate ANSI T1.413 Issue 2 and ITU G.dmt (G.992.1)

ADSL standards, and with the splitterless ITU G.lite (G.992.2)

specification. This rate-adaptive solution is designed for controller-

less PCI desktop applications and supports downstream data rates

of up to 8 Mbps and upstream data rates of up to 1 Mbps.

Features

• Complete controller-less PCI ADSL

solution

• Compliant with ADSL standards

− Full-rate ANSI T1.413 Issue 2 and ITU

G.dmt (G.992.1) standards

− Splitterless ITU G.lite (G.992.2)

specification

The device set takes advantage of the processing power available

with most new computers by eliminating the need for a separate

microcontroller, resulting in a cost-effective solution suitable for

both G.dmt and G.lite applications. Host-based software provides

support for current industry standards for PPP over AAL5 over

ATM over ADSL and RFC 1483 for Windows 98 and Windows

2000.

• DMT modulation and demodulation

• Full-rate adaptive modem

− Maximum downstream rate of 8 Mbps

− Maximum upstream rate of 1 Mbps

• Supports splitterless ADSL

implementation

• WAN mode support: PPP over AAL5/ATM

over ADSL via Windows 98/2000

• LAN mode support: RFC 1483 via

Windows 98/2000

• Compliant with PCI Local Bus

Specification, Revision 2.2

The device set, as shown in Figure 1, consists of four chips:

•

PCI bus interface (AccessRunner P46 in a 176-pin TQFP)

DMT-based data pump (AccessRunner 11627 in a 176-pin

TQFP)

• Compliant with PCI Bus Power

Management Interface Specification,

Version 1.0

•

Analog front end (AccessRunner 20431 in a 32-pin TQFP)

Line driver (AccessRunner 20441 in a 16-pin SSOP or

32-pin TQFP)

• Tone detection for low power mode

D20431 AFE Features

PCI Bus

• Receive signal path includes:

− Integrated hybrid receiver circuit with

programmable gain

− High pass filtering and 27dB of

Automatic Gain Control (AGC) to

improve signal-to-echo ratio

− 14-bit ADC

• Transmit signal path includes:

− 30dB of AGC for transmit power control

− Low pass filtering to suppress noise in

the receive band

Host-

Based

ADSL

Controller

Software

11627

20431

Analog Front

End

20441

Line Driver

16-pin TSSOP

P46

PCI Bus

Interface

176-pin TQFP

Telephone

Line

ADSL DMT

Data Pump

176-pin TQFP

32-pin TQFP

− 14-bit DAC

•

Independent digital serial data and control

interfaces

Low power tone detection mode.

Figure 1. AccessRunner ADSL Modem for PCI Applications

Data Sheet (Preliminary)

Conexant Proprietary Information

Doc. No.100394B

October 19, 1999

12 3 4 5 6 7...24

中文翻译

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