Patent ID: 7095250
Filing Date: 2006-08-22
Classification: G06F

Abstract:
1. A single wire bus communication system, comprising: a bus wire; a message originating device having an output connected to said bus wire, a pull-up device connected to pull said bus wire up to a “high” logic level when enabled, and a pull-down device connected to pull said bus wire down to a “low” logic level when enabled; at least one client device, each client device having an output connected to said bus wire, a pull-up device connected to pull said bus wire up to a “high” logic level when enabled, and a pull-down device connected to pull said bus wire down to a “low” logic level when enabled; wherein each of said client devices' pull-up devices conducts more current when enabled than said message originating device's pull-down device; said system arranged such that, in response to a trigger event that requires responses from multiple client devices simultaneously, said message originating device enables its pull-down device, and each of said client devices disables its pull-down device when conveying a “low” logic level onto the bus wire.