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RP144LD PDF预览

RP144LD

更新时间: 2024-11-05 22:43:51
品牌 Logo 应用领域
科胜讯 - CONEXANT 调制解调器
页数 文件大小 规格书
24页 283K
描述
LOW VOLTAGE V.90/K56FLEX V.34/V.32 BIS MODEM DATA PUMPS FOR LOW POWER APPLICATIONS

RP144LD 数据手册

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Introduction  
Features  
Downloadable MDP code from the host/DTE  
2-wire full-duplex  
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.  
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)  
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.  
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  
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.  
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  
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).  
Diagnostic capability  
V.54 inter-DCE signaling  
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.  
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  
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.  
Meets PC Card Type II envelope requirements  

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