Design of a CMOS token ring LAN controller, TRC, compatible with IEEE802.5 MAC protocol

Token ring has been increasing its importance among LAN (local area network) protocol as the need for deterministic response and low cost wirings continues to grow[1][2][3]. However, its complexity has caused multiple chip solutions for controllers, which are power and space consuming. Taking advantage of advanced CMOS circuits, we have newly developed a single chip high performance token ring controller(TRC). which is compatible with the IEEE802.5 standard MAC (media access control) protocol and suitable for low power equipment