Introduction
The CONEXANT™ RC56D Modem Device Set supports the USB (Universal Serial Bus), as described by the Universal Serial Bus Specification Revision 1.0. USB provides a flexible interconnect between a PC and a wide range of peripherals, such as to a CONEXANT modem device set.

Features
• All features supported by the RC56D family (see data sheet Order No. MD211)
• Universal Serial Bus Specification Rev 1.0 compliant
• Three function endpoint pairs with corresponding
transmit/receive FIFO pairs
• Automatic transmit/receive FIFO management
• USB full speed 12Mbps
• USB low speed 1.5Mbps
• Reset separation
• Four LED driver outputs
• On-chip phase-locked loop (PLL)
• On-chip USB transceivers
• 256 bytes on-chip Data RAM
• Suspend/Resume
• Vendor specific descriptors
• Windows 98 support
• Windows 95 OSR 2.1 support
• Extension pickup/remote hang-up detection
• Line-in-use detection