Where USB On-The-Go Comes in?
With vast majority of peripherals communicating with a computer through Universal Serial Bus, USB is naturally the candidate for mobile point-to-point connectivity. Though, the major obstacle associated with this proposal is that USB employs a master-slave protocol, which relies on the intelligence of the host. Implementing the entire USB host on any portable electronics will be an over-kill for any dedicated devices. Not only will a standard USB host significantly cripple the battery life of a low-powered device, the connectors are also too large for the form factor of those miniature devices. To address these problems, a new supplement to USB 2.0 specification has been finalized in December 2001. The new standard, called USB On-The-Go, defines new mini connectors, negotiation rules and power requirements used in both host and peripheral. The specification also calls for a new type of device called ‘dual-role peripheral’ in which it can act as either host or peripheral depending on ho
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- Where USB On-The-Go Comes in?
