Patent ID: 7358758

Claim:
An apparatus for enabling a multi-device environment on a bus, the bus requiring active termination impedance control, the apparatus comprising: a first node, configured to receive an indication that a corresponding device is at a physical end of the bus or that said corresponding device is an internal device; and multi-processor logic; coupled to said first node, configured to control how a second node is driven according to said indication, wherein said second node is coupled to the bus; wherein said multi-processor logic enables pull-up logic and pull-down logic if said indication indicates that said corresponding device is at said physical end of the bus; and wherein said multi-processor logic disables said pull-up logic and enables said pull-down logic if said indication designates said corresponding device as an internal device; and wherein said pull-down logic drives said second node to a prescribed low voltage level regardless of whether said pull-up logic is enabled or disabled.