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RP144LD: 产品描述low voltage V.90/k56flex V.34/V.32 bis modem data pumps for low power applications; 文件大小284KB，共24页; 制造商CONEXANT; 官网地址http://www.conexant.com/

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RP144LD概述

low voltage V.90/k56flex V.34/V.32 bis modem data pumps for low power applications

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Introduction

The CONEXANT™ RP56LD, RP336LD, and RP144LD

Modem Data Pump (MDP) families support data/fax

modem, voice coding/decoding, optional full-duplex

speakerphone, and optional AudioSpan (Table 1). Low

voltage and low power consumption support portable

applications. Downloadable architecture allows upgrading

of MDP code from the host/DTE.

In V.90/K56flex mode (RP56), the MDP can receive data

at speeds up to 56 kbps from a digitally connected V.90-

or K56flex-compatible central site modem. These MDPs

take advantage of the PSTN which is primarily digital

except for the client modem to central office local loop and

are ideal for applications such as remote access to an

Internet service provider (ISP), on-line service, or

corporate site. The MDP can send upstream data at

speeds up to V.34 rates.

In V.34 data mode (RP56 and RP336), the MDP can

connect at the highest data rate the channel can support

from 33.6 kbps to 2400 bps with auto-fallback to V.32bis.

In V.32 bis mode, the MDP can connect at the highest

data rate the channel can support from 14.4 kbps to 4800

bps with optional auto-fallback to lower rate modulations.

Internal HDLC support eliminates the need for an external

serial input/output (SIO) device in the DTE for products

incorporating error correction and T.30 protocols.

Voice mode includes an Adaptive Differential Pulse Code

Modulation (ADPCM) voice coder and decoder (codec).

The codec compresses and decompresses voice signals

for efficient digital storage of voice messages. The codec

operates at 28.8k, 21.6k, or 14.4k bps (4-bit, 3-bit, or 2-bit

quantization, respectively) with a 7.2 kHz or 8.0 kHz

sample rate.

A voice pass-through mode allows the host to transmit

and receive uncompressed voice samples in 16-bit linear

form at 7.2 kHz, 8.0 kHz, or 11.025 kHz sample rate, or in

8-bit A-Law/µ-Law PCM form at 8.0 kHz sample rate.

SP models support position-independent full-duplex

speakerphone (FDSP) operation using a dual internal

integrated analog circuit to interface with the telephone

line and the audio input/out (i.e., a headset, handset, or a

microphone with external speaker).

SP models in 144-pin TQFP also support a 4-line voice

serial interface used to transfer 16-bit linear or 8-bit A-

Law/µ-Law PCM FDSP voice samples with acoustic echo

cancellation to and from the host.

SP models also support AudioSpan (analog simultaneous

audio/voice and data) operation at a data rate of 4.8 kbps.

The MDP operates over the public switched telephone

network (PSTN) through the appropriate line termination.

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Features

•

Downloadable MDP code from the host/DTE

•

2-wire full-duplex

−

V.90 and K56flex (RP56 models)

−

V.34 (33.6 kbps) (RP56 and RP336 models)

−

V.32 bis, V.32, V.22 bis, V.22, V.23, and V.21

−

Bell 212 and 103

•

2-wire half-duplex

−

V.34 fax, V.17, V.33, V.29, V.27 ter, and V.21 ch 2

−

Bell 208

−

Short train option in V.17 and V.27 ter

•

Serial synchronous and asynchronous data

•

Parallel synchronous and asynchronous data

•

Parallel synchronous SDLC/HDLC support

•

In-band secondary channel (V.34 and V.32 bis)

•

Automatic mode selection (AMS)

•

Automatic rate adaption (ARA)

•

Digital near-end and far-end echo cancellation

•

Bulk delay for satellite transmission

•

ADPCM voice mode (7.2 kHz or 8.0 kHz)

•

Voice pass-through mode (7.2 kHz, 8.0 kHz, or 11.025 kHz)

•

Full-duplex speakerphone (SP models)

−

Acoustic and line echo cancellation

−

Programmable microphone AGC

−

Microphone volume selection and muting

−

Speaker volume control and muting; room monitor

•

Voice serial data interface (144-pin TQFP, SP models)

−

16-bit linear or 8-bit A-Law/µ-Law PCM voice

samples

−

FDSP support with acoustic echo cancellation

•

AudioSpan (SP models)

−

ITU-T V.61 modulation (4.8 kbps data plus audio)

−

Handset, headset, or half-duplex speakerphone

•

TTL and CMOS compatible DTE interface

−

ITU-T V.24 (EIA/TIA-232-E) (data/control)

−

Microprocessor bus (data/configuration/control)

•

Dynamic range: -9 dBm to -43 dBm

•

Adjustable speaker output to monitor received signal

•

DMA support interrupt lines

•

Transmit and receive (16+128)-byte FIFO data buffers

•

NRZI encoding/decoding

•

511 pattern generation/detection

•

V.8 and V.8 bis signaling

•

V.13 signaling

•

Diagnostic capability

−

V.54 inter-DCE signaling

−

V.54 local analog and remote digital loopback

•

+3.3V operation with +5V tolerant inputs

−

+5V or +3.3V analog signal interface

•

Low power consumption:

−

Normal Mode = 260 mW; Sleep Mode = 40 mW

•

Low profile, small footprint package

−

100-pin PQFP or 144-pin TQFP

−

Meets PC Card Type II envelope requirements

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RP144LD相似产品对比

	RP144LD	RP336LD	RP56LD
描述	low voltage V.90/k56flex V.34/V.32 bis modem data pumps for low power applications	low voltage V.90/k56flex V.34/V.32 bis modem data pumps for low power applications	low voltage V.90/k56flex V.34/V.32 bis modem data pumps for low power applications

RP144LD

RP144LD概述

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