Enabling Hot-Plug with IDT PCI Express® Gen2 System Interconnect Switches Application Note
●Introduction:
■The PCI Express® architecture is designed to natively support both hot-add and hot-removal ("hot-plug") of adapters and provides a "toolbox" of mechanisms that allow different user/operator models to be supported using a self-consistent infrastructure. IDT PCIe® switches support hot-plug on all of its down-stream ports. There are software and hardware elements required to support the Hot Plug environment. The major software elements include the User Interface, Hot-Plug Service, Hot Plug System Driver, and Device Driver. As for major hardware elements, Hot-Plug Controller, Card Slot Power Switching logic, Card Reset logic, Power Indicator, Attention Indicator Attention Button, and Card Present Detect Pins are included.
■IDT PCIe Gen2 System Interconnect switches have two ways of implementing hot-plug functionality. Some devices in this switch family offer one ore more ports that support all of the pins needed to implement hot-plug functionality in the device itself. These ports can be called on-chip hot-plug supported ports. The remaining ports can utilize an external SMBus/I²C bus-based I/O expander connected to the master SMBus interface of the Switch for hot-plug related signals associated with downstream ports as illustrated in Figure 1.
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89HPES64H16G2 、 PES64H16AG2 、 PES34H16G2 、 PES22H16G2 、 PES48H12AG2 、 PES48T12G2 、 PES32H8G2 、 PES64H16G2 |
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Application note & Design Guide |
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Please see the document for details |
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English Chinese Chinese and English Japanese |
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July 20, 2009 |
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AN-720 |
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393 KB |
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