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DSP1648C Datasheet(PDF) 1 Page - Agere Systems |
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DSP1648C Datasheet(HTML) 1 Page - Agere Systems |
1 / 4 page Product Brief September 2001 Agere Systems DSP1648C Host-Based Controller V.92 Modem Chip Set Features s Two chip 3.3 V PCI modem solution with 5 V tolerant buffers s Data mode capabilities: — ITU-T V.92*: 56000 bits/s—28000 bits/s — ITU-T V.90*: 56000 bits/s—28000 bits/s — ITU-T V.34: 33600 bits/s—2400 bits/s — V.32bis, and fallbacks — V.42 and MNP ™ error correction (LAPM) — V.44, V.42bis and MNP Class 5 data compression s FAX mode capabilities: — ITU-T V.17, V.29, V.27ter, and V.21 Ch 2 — ITU-T T.31 Class 1 FAX s Compatible with transformer-based and silicon DAA circuits: — High-precision sigma-delta codec (CSP1034C) — Line-powered silicon DAA (CSP1035A) s Enhanced voice features: — Full-duplex speakerphone (requires CSP1027 audio codec) — Telephone answering machine (TAM) — Caller identification (caller-ID) s V.80 video-ready interface s Bit I/Os to support domestic and international DAAs s Low power consumption s Flexible power management modes s Operating system support: — Windows ® 95, 98, 2000, Windows NT ® 4.0, Windows ME, and Windows XP — Linux ® — PC 2001 compliant Introduction The DSP1648C, host-accelerated modem chip is an exciting new upgrade to Agere Systems Inc. line of host-based controller modems. The DSP1648C upgrades the technologies found in the DSP1648 V.90 modem solution to the new ITU-T recommendations V.92 and V.44 communication industry standards. V.92 and V.44 have four innova- tive features, designed to improve modem perfor- mance in the internet environment. The new features are as follows: s Modem fast connect: faster start-up times. s Modem on hold†: switch between modem and an incoming phone call without losing the data connection. s PCM upstream: send data to central site at rates approaching 48 kbits/s. s Data compression enhancement focused on todays internet traffic. The DSP1648C has an integrated PCI interface, which eliminates the 16550 UART bottleneck found in traditional hardware modems. The PCI interface supports both slave and master operations while pro- viding greater access to host PC system resources. Host-based controller modems have the benefit of using powerful CPUs and accessing their plentiful RAM and disk space. Modem firmware can therefore be updated in the field since the code simply resides on the disk. With this feature set, designers can create full-fea- tured modem solutions which are characterized by low-cost, low power consumption, and high-perfor- mance. * Due to FCC limitations, speeds of 53 kbits/s are the maximum permissible transmit power levels during download transmis- sion. Actual data speeds will vary depending on the line conditions. † Modem on hold functionality requires call waiting services. |
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