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Frequently Asked Questions

Search our knowledge base of commonly asked questions to find answers to your questions about Diodes Incorporated's and Pericom's products and services.

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Do Pericom's Packet Switches Support Industrial Temperature Range (-40oC to +85oC)?

"YES, please refer to the following application notes.

AN219 – GreenPacket PCI Express Packet Switch – Industrial Temperature Support 1.0

AN220 – PI7C9X20303SL-404SL Industrial Temperature Support

AN221 – PI7C9X20303ULA Industrial Temperature Support"

 

Does the bridge implement cache snooping?

The bridge does not do any cache snooping. The PCI bus is not responsible for snooping. If you think that snooping is required then you have to have your own cache controller on the PCI bus to do snooping. The bridge stores memory writes briefly but they continuously are written to the far side of the bridge. If you wish to flush the posted write buffers, your application should place an IO write or IO read command into the transaction queue. Memory writes initiated after that commands are executed after the IO transaction concludes.

What is the requirement of the reference clock of Pericom's packet switches?

The reference clock DC specifications and AC timing requirements are shown in the table below. More details can be found in "PCI Express Card Electromechanical Specification Revision 1.1", Chap 2.1.3.