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OCP NIC 3.0 Coversheet - Instructions Page
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Tab NameDescription
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Coversheet - Instruction PageCoversheet / Instructions page - This tab.
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OCP NIC 3.0 PinmapThe connector pinout for the Small Form Factor (SFF) and Large Form Factor (LFF) cards are detailed out on this tab.
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PCIe(R) Bifurcation DecoderThe bifurcation decoder sheet shows a high level PCIe link result for a given OCP NIC 3.0 card and server combination.
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PCIe(R) Bifurcation ExpandedThe PCIe Bifurcation Expanded table shows the resulting PCIe link result for a given OCP NIC 3.0 card and server combination. Additionally, this tabe shows the Host, Socket, PCIe PERST#, REFCLK association for all the permissible configurations.

This tab may be filtered by the physical card size, card short name, PRSNTB[3:0] value, number of hosts, number of upstream sockets, the BIF value and the resulting link.

The most typical usage case is a Single Host, Single Socket configuration. This information can be easily obtained by filtering on the "Host" and "Upstream Devices" columns. This covers the most common use cases.
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BIF Usage KeyThe BIF[2:0]# pins allow the Baseboard to configure the OCP NIC 3.0 PCIe end point for a specific bifurcation configuration early in the power sequencing process.

This tab summarizes the result from the PCIe Bifurcation Decoder and PCIe Bifurcation Expanded tables.
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PRSNT Pin Pseudo CodeThe PRSNT[3:0]# pins allow the Baseboard to determine the OCP NIC 3.0 card type that is plugged in and configure the PCIe link/bifurcation of the OCP slot. The Baseboard uses this information to configure the OCP slot in the power sequencing process.

This tab shows a typical pseudo code flow a BIOS developer can use to decode the PRSNT pins.
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