Datenblatt-Suchmaschine für elektronische Bauteile |
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RC56LD Datenblatt(PDF) 1 Page - Synaptics Incorporated. |
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RC56LD Datenblatt(HTML) 1 Page - Synaptics Incorporated. |
1 / 22 page 'DWD 6KHHW 2UGHU 1R 0' 5HY -DQXDU\ 5&/'5&/'DQG5&/' Integrated V.90/K56flex ™/V.34/V.32bis Modem Device Sets for Low Power Applications The Conexant ™ RC56LD, RC336LD, and RC144LD Modem Device Set supports data/fax, V.80 synchronous access mode, world-class, voice/TAM/ telephony extensions, speakerphone, AudioSpan, DSVD, and cellular/GSM operation depending upon the model, ROM size, and installed firmware (Table 1). The modem supports the following primary data modulations: ITU-T V.90/K56flex ™ (RC56), V.34 (RC56 and RC336) and V.32bis. The modem is designed to operate with dial-up telephone lines in the U.S. and world-wide. PC Card interface models also support analog cellular direct connect and GSM direct connect. Parallel host interface models can support either analog cellular direct connect and GSM direct connect or telephony extensions. Serial DTE interface models support telephony extensions. Low profile, small PQFP/TQFP packages and low voltage operation with low power consumption make this device set ideal for laptop, notebook, and palmtop applications using parallel host or serial DTE interface with the MCU or using PC Card interface with the MCUP. The device set consists of an 8-bit microcomputer (MCU) or MCU with built-in PC Card interface (MCUP) in a 128- pin TQFP and a modem data pump (MDP) in a 144-pin TQFP or 100-pin PQFP. The SP model can also be ordered with an RCDSVD Speech Codec Processor (SCP) in a 100-pin PQFP to support DSVD. The MCUP PC Card interface supports two peripheral channels, one channel for the modem and a second channel for an optional user-defined function (Function 2). Downloadable architecture supports downloading of modem firmware from the host/DTE to the MCU and, transparently to the host/DTE, the downloading of MDP code modules from the MCU. The modem operates by executing firmware from external 1Mbit (128k x 8) RAM and 2Mbit (256k x 8) ROM/flash ROM. The RC336 and RC144 can alternatively use external 1Mbit or 2Mbit ROM/flash ROM and either internal or external 32k x 8 RAM. Double the normal ROM size for GSM operation. In V.90/K56flex mode (RC56), the modem can receive data at speeds up to 56 kbps from a digitally connected V.90- or K56flex-compatible central site modem. Taking advantage of the PSTN which is primarily digital except for the client modem to central office local loop, V.90/K56flex modems are ideal for applications such as remote access to an Internet Service Provider (ISP), on- line service, or corporate site. The modem can send data at speeds up to V.34 rates. In V.34 data mode (RC56 and RC336), the modem operates at line speeds up to 33.6 kbps. Error correction (V.42/MNP 2-4) and data compression (V.42 bis/MNP 5) maximize data transfer integrity and boost average data throughput up to 230.4 kbps. Non-error-correcting mode is also supported. In V.32 bis mode, the modem operates at line speeds up to 14.4 kbps. The modem supports fax Group 3 send and receive rates up to 33.6 kbps and supports T.30 protocol. V.80 synchronous access mode supports host-based communication protocols, e. g., H.324 video conferencing. In voice/TAM mode, enhanced 2-bit or 4-bit per sample ADPCM coding and decoding at 7200 Hz sample rate allows efficient digital storage of voice/audio. This mode supports applications such as digital telephone answering machine (TAM), voice annotation, and recording from and playback to the telephone line. SP models support position independent, full-duplex speakerphone (FDSP) operation using microphone and speaker, as well as other voice/TAM applications using handset or headset. SP models also support AudioSpan (analog simultaneous audio/voice and data) operation with a data rate of 4.8 kbps with audio. SP models, using the optional RCDSVD SCP device, support hardware-based (on-board) V.70 DSVD (digital simultaneous voice and data) with speech coding per ITU-T interoperable G.729 and G.729 Annex A with interoperable G.729 Annex B. GSM operation with 4M ROM is not available when the RCDSVD SCP is used. Host-based DSVD is supported in all models, however, the host PC must supply full-duplex sound support, typically to a microphone/speaker, such as provided by Conexant WaveArtist devices or a sound card. GSM operation supports data services offered by the Global System for Mobile Communications network: data transmissions to PSTN, ISDN or GSM users. GSM data operation allows data and fax transfer, and connection to videotex. Analog cellular and GSM direct connect operation is supported by licensed firmware for specific phone types. A common PC board design can support data/fax, V.80, voice/TAM/telephone extensions, speakerphone, AudioSpan, and host- or on-board DSVD operation depending on the installed modem devices. Accelerator kits and reference designs are available to minimize application design time and costs. PC-based “ConfigurACE™ II for Windows” software allows MCU firmware to be customized. |
Ähnliche Teilenummer - RC56LD |
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Ähnliche Beschreibung - RC56LD |
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