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DS28-L147-203 Datasheet(PDF) 9 Page - Synaptics Incorporated. |
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DS28-L147-203 Datasheet(HTML) 9 Page - Synaptics Incorporated. |
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9 / 94 page  CX81801-7x/8x SmartV.XX Modem Data Sheet 102199B Conexant 1-1 1. Introduction 1.1 Overview The Conexant ® SmartV.XX Modem is a full-featured, worldwide, controller-based modem that integrates modem controller (MCU), modem data pump (MDP), 256 KB ROM, 32 KB RAM, and SmartDAA system side device (SSD) functions onto a single die. The modem operates by executing firmware from internal ROM and RAM. Optional customized firmware is supported with optional external flash ROM memory. Additionally, added/modified country profiles are supported by internal SRAM patch (maximum of one profile) or serial EEPROM. Downloadable architecture supports downloading of customized MCU firmware from the host/DTE to the SmartV.XX modem. The SmartV.XX Modem device set consists of a CX81801 modem device in a 128-pin TQFP and a CX20493 SmartDAA Line Side Device (LSD) in a 28-pin QFN. Conexant’s SmartDAA ® technology eliminates the need for a costly analog transformer, relays and opto-isolations typically used in discrete DAA (Data Access Arrangement) implementations. The SmartDAA architecture also simplifies product implementation by eliminating the need for country-specific board configurations enabling worldwide homologation of a single modem board design and a single bill of materials (BOM). Low profile, small TQFP and QFN packages with reduced voltage operation and low power consumption makes this device set an ideal solution for embedded and palmtop application using parallel host or serial DTE interface. The SmartV.XX Modem supports data rates up to V.92, data compression, error correction, fax rates up to 14.4 kbps and speakerphone mode. In V.92 and V.90 (V.92 models) data modes, the modem can receive data at speeds up to 56 kbps. In V.34 data mode (V.92 and V.34 models), the modem can receive data at speeds up to 33.6 kbps. In V.32 bis data mode, the modem can receive data at speeds up to 14.4 kbps. Data compress (V.44/V.42bis/MNP5) and error correction (V.42/MNP 2-4) modes are supported to maximize data throughput and data transfer integrity. Non-error-correction mode is also supported. Fax Group 3 send and receive rates are supported up to 14.4 kbps with T.30 protocol. The SmartV.XX modem operates with PSTN telephone lines worldwide. S models, using the optional CX20442 Voice Codec (VC) in a 32-pin TQFP, support position independent, full-duplex speakerphone (FDSP) operation using microphone and speaker, as well as other voice/TAM applications using handset or headset. Table 1-1 lists the available models. A simplified device interface drawing is shown in Figure 1-1. A functional interface drawing showing optional memory is shown in Figure 1-2. |
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