PCIE Hard IP for for HSMC port

[Altera_Forum]

Hi, 

In Cyclone IVGX development kit (NOT the starter kit) with EP4CGX150DF31, the schematic shows that the PCIE hard ip is available for transceiver block GXBL0 - transceiver channels 0-3 (PCIE x4 or HSMC XCVR PORT B ).  My doubts are: 1. Does this mean that i can use pcie hard ip if i wish to initiate PCI express connection via HSMC port B (not the pcie edge connector)? 2. The user guide also states that HSMC port B only supports single ended signaling. Will that be an issue if i want to use PCIE connection via the HSMC port B?  regards.

[Altera_Forum]

--- Quote Start ---  Hi, In Cyclone IVGX development kit (NOT the starter kit) with EP4CGX150DF31, the schematic shows that the PCIE hard ip is available for transceiver block GXBL0 - transceiver channels 0-3 (PCIE x4 or HSMC XCVR PORT B ).   My doubts are: 1. Does this mean that i can use pcie hard ip if i wish to initiate PCI express connection via HSMC port B (not the pcie edge connector)? 2. The user guide also states that HSMC port B only supports single ended signaling. Will that be an issue if i want to use PCIE connection via the HSMC port B?   regards.  --- Quote End ---     Hi Barron,    Did you able to find answers to your questions above? I am having the same questions in mind. Can you (or anyone) please shed some light here?

[Altera_Forum]

Hi Hmansor, 

I had contacted the altera guys, and i got the following reply.  Q1. Does this mean that i can use pcie hard ip if i wish to initiate PCI express connection via HSMC port B (not the pcie edge connector)?   A1. Technically, you can use the HSMC port B to connect the PCIe. However, by default the XCVR_RX_P and XCVR_RX_N channels of the FPGA are connected to the PCIE_RX_P and PCIE_RX_N signals, while the XCVR_TX_P and XCVR_TX_N channels are connected to the PCIE_TX_P and PCIE_TX_N signals. Also, it is not feasible to use the HSMC port B signals as it is single ended (PCIe signals requires differential signals)   Q2. The user guide also states that HSMC port B only supports single ended signaling. Will that be an issue if i want to use PCIE connection via the HSMC port B?   A2. Yes there will be an issue if using HSMC port B because PCIe requires differential signaling.  Hope this helps. If you have any further doubts, feel free to ask.  Best Regards, Barron.