CX20493-31
数据手册.pdfModem Chip Single Chip 2.4Kbps 28Pin QFN
Overview
The Conexant®SCXV.92, SCXV.34, and SCXV.32bis modems are worldwide operational modem device sets for embedded applications that support modulations up to V.92, V.34, and V.32bis, respectively refer to Table 1-1. All modems also support V.44/V.42bis/MNP 5 data compression for greater data throughput, V.42 LAPM/MNP2-4 error correction protocol for increased data integrity and reliability.
Features
• Modulations and protocols
− ITU-T V.92
♦ Modem-on-Hold MOH
♦ Quick connect QC
♦ PCM upstream
− V.90/V.34/V.32bis/V.32
− V.22bis/V.22/V.23/V.21
− V.23 reverse, V.23 half-duplex
− Bell 212A/Bell 103
− V.29 FastPOS
− V22bis fast connect
− V.80 Synchronous Access Mode
• Data compression
− V.44/V.42bis/MNP5
• Error correction
− V.42/MNP 4/MNP 2
• Call Waiting CW detection
• Type I and Type II Caller ID CID decoding
• DTE/host interface
− Serial DTE interface
− Parallel 16550 UART-compatible host interface 38-pin version
− Direct Mode
− Synchronous Mode
− Asynchronous Mode
• No external memory required
• Sixty-three embedded and upgradeable country profiles
• Serial NVRAM interface for optional permanent country profile storage 38-pin
version
• Embedded AT commands
• Full-duplex Voice Pass-Through Mode
− Mu-Law, A-Law serial and parallel host interface
− 14-bit PCM parallel host interface only
• SmartDAA
− Extension pick-up detection
− Digital line protection
− Line reversal detection
− Line-in-use detection
− Remote hang-up detection
− Worldwide compliance
• Selectable 28.224 MHz or 27.000 MHz frequency of operation
• Low power and voltage
− Single +3.3V supply
− Low power consumption mode
− +3.3V I/O level
• Compact, robust board design
− Small, low-profile modem packages
− SmartDAA and DIB technologies
− Reference design supports 5KV isolation
Applications
• Set top boxes
• Point-of-Sale terminals
• ATM machines
• Metering terminals
• Video game consoles
• Internet appliances