AN2905FHQ

EZ-Link (AN2720SC) Single-Chip USB-to-USB Networking Solution FEATURES Smallest completely integrated solution in the market 32 pin TQFP Only requires a single crystal and small 16 byte serial EEPROM for full implementation Meets difficult suspend current of 500 uA for both hosts 2K data buffer for maximum speed transfer Greater than 5 Mbps data transfer rate Low power – Less than 100 mW power OVERVIEW The Cypress AN2720SC provides a single-chip solution for networking two or more computers via their USB ports. In a USB system, the PC acts as a host, which initiates all USB traffic. USB devices act as slaves, which respond to host requests. It is inherently incompatible to connect two PCs together via a simple USB cable, since a master (host) cannot talk to another master (host). A master can talk only to one or more slave devices. The AN2720SC overcomes this “peer-to-peer” incompatibility by providing two USB devices, one for each PC. Two independent Serial Interface Engines (SIE) exchange data through a 2 kilobyte FIFO. Thus, USB data transmitted by one computer is made available to the other computer through the AN2720SC. The connection is full duplex– data can be transferred in both directions simultaneously. AN2720SC Block Diagram System Application EZ-Link (AN2720SC) APPLICATIONS AND MARKETS The use of the AN2720SC and special network driver software provided by Cypress allows very simple and efficient networking between PCs. The “plug-and-play” nature ...