EKF SC4-CONCERTO, Руководство пользователя

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User Guide • SC4-CONCERTO • CompactPCI
®
Serial CPU Board
PCI Express
®
Interface
The SC4-CONCERTO is provided with several PCI Express (PCIe) lanes for I/O expansion. Sixteen PCI
Express lanes, originating from the processor, are building the two fat pipes defined by CompactPCI
®
Serial. These two links consists of eight lanes with transfer rates of up to 8Gbps (PCI Express Gen 3).
The CM238 offers a total of up to sixteen PCI Express ports supporting PCIe Gen 3 speed (8GT/s). Four
of them are used to operate the two Ethernet Controllers (i219LM and i210IT) and to build a double
lane link to the Marvell 88SE9230. Six ports are connected to the CompactPCI
®
Serial connectors
P4/P5 (six lanes), four to the high speed expansion connector P-HSE2.
Four combo ports are fed to the local expansion interface connector P-HSE1, that may work as PCIe
(1x4 or 2x2) or as SATA ports, strapped dynamically by configuration signals on P-HSE1. Possible
settings are
▸
One PCIe link x 4
▸
Two PCIe links x 2
▸
Four SATA links
▸
One PCIe link x 2, two SATA links
By default the PCIe lanes connected to the 2
nd
high speed expansion connector P-HSE2 build four PCIe
links with one lane. Alternative configurations (1x4 or 2x2) are possible by programming soft-straps
within the SC4 firmware image. Ask EKF if changes are required.
See sections “P-HSE1" and “P-HSE2" from “Mezzanine Connectors" for details.
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