The PCnet-ISA controller, a single-chip Ethernet controller, is a highly integrated system solution for the PC-AT Industry Standard Architecture (ISA ) architecture. It is designed to provide flexibility and compatibility with any existing PC application. This highly integrated 120-pin VLSI device is specifically designed to reduce parts count and cost, and addresses applications where higher system throughput is desired. The PCnet-ISA controller is fabricated with AMD's advanced low-power CMOS process to provide low stand by current for power sensitive applications.