Conexant SC56D-S 56k Controller 2 MB ROM DFS

Flash-Upgradeable V.90/K56flex PLL-Controller ISA/Serial Modem Chipsets

Usage: To find other modems with the same chipset.

All drivers, downloads & info on this site are found via the modem.
Each Modem Manufacturers’ page also has external web-links, where available.

General Information

This is a single-chip development of the ACF-series of Rockwell (then Conexant) modems. Do not be fooled by the name - whilst a single chip contains all controller, datapump, bootloader & line-codec functions, other chips/components are required for line-interface & speakerphone. Plug-compatible variants are also provided for V.34 & V.32bis operation.

This series of modems--which can be identified by the presence of a “PLL” in the ati6 response, and typically will have 2 MB of Flash-ROM, which allows either V.90 or K56flex connection--looks like this:

• SC56D - 06827-xx
• SmartACF - P9373-xx
• SmartSCM - P2106-xx (embedded)
• RC56D - R6764-6x

The “D” in the name indicates that the modem downloads Firmware controller- & datapump-modules into the chip whilst in operation. This method of operation provides flexibility to the manufacturer in customisation of the modem. In addition, if Flash-EEPROM is provided, the modem Firmware can be upgraded by the customer. (The difference between this & the HCF-modems--which use a very similar method of operation & even share module-code--is that these modems contain a Controller in silicon, whereas the H-ost C-ontrolled M-odems use the computer for controller functions).

Copyright Statement

Compilation, original writings & design Copyright ©2002 - 2008 Modem-Help, Ltd.
All trademarks respected as the property of their respective owners.
Full Copyright + Disclaimer statement