Peer Bus Line Steering Mechanism
Original Publication Date: 1988-Jun-01
Included in the Prior Art Database: 2005-Feb-15
This article describes a technique that provides line steering indications on a repowered peer bus, and also provides signals for peer arbitration among units on the bus. The technique requires only two signal lines and does not require end-to-end cabling loopback. Fig. 1 is a general diagram of a repowered peer bus. There are two basic types of units that reside on such a bus: 1.Bus Unit (BU) - Bus units can communicate with each other on the bus. The pair of units communicating on the bus during a bus operation are called the master and slave. The unit initiating the operation is the bus master. 2.Repower Unit (RU) - a repower unit receives and redrives the bus. This function is twofold: - Redrive - Refreshing signals on the bus to their appropriate drive levels with deskew as appropriate.