Patent ID: 7346710
Filing Date: 2008-03-18
Classification: G06F

Abstract:
1. An expansion circuit for an embedded system comprising a host controller and a peripheral device, said expansion circuit comprising: a logic circuit coupled to first and second signals, said first and second signals coupled to said host controller and to said peripheral device, said logic circuit generating an internal signal in response to the condition wherein said first and second signals transition directly between a first state and a second state; wherein said host controller is configured such that said first and second signals transition to a third state after said first state and before said second state when the state of said first and second signals are changed as necessary to perform input from or output to said peripheral device; and wherein said host controller is configured such that said first and second signals transition directly between said first state and said second state when the state of said first and second signals are changed as necessary to perform input from or output to said expansion circuit.