[Configuration of "PCIe + 10G Ethernet *2 + DDR3 *2 + QDR" on NetFPGA-SUME(XC7V690T FFG1761-3)]

Dear JColvin-san,

We found the timing error on our circuit. After solving it, PCIe can work well. So please close this item.

Best Regards,

Masayuki Nakazawa

[Configuration of "PCIe + 10G Ethernet *2 + DDR3 *2 + QDR" on NetFPGA-SUME(XC7V690T FFG1761-3)]

I would like to confirm whether the configuration of "PCIe + 10G Ethernet *2 + DDR3 *2 + QDR" is possible. Below is the evaluation board, configuration, background of the question, and the question. 

 

[1] Evaluation board

NetFPGA-SUME (family: Virtex-7 (*Note), model number: XC7V690T FFG1761-3)

 

[2] Desired configuration

PCIe + 10G Ethernet *2 + DDR3 *2 + QDR 　

For DDR3 and QDR, the following settings are currently being used.

DDR A=IC27, DDR B=IC28, QDR B=IC29 (Unused: QDR A = IC26, QDR C = IC30)

 

[3]Current situation and problems

(1)The problem was that the configuration I wanted to achieve did not recognize PCIe.

•  PCIe + 10GEth * 2 + DDR3 * 2 + QDR configuration does not recognize PCIe

(2)Next, we are trying the following as a separation.

• PCIe + 10GEth*2 configuration: PCIe recognition
• PCIe + 10GEth*2 + DDR3*2 configuration: PCIe not recognized

(3)In addition, since the clock routing causes an error, the error is downgraded to a warning with the following settings (described in xdc)

• # Restrictions on the clock system Various settings for set_property CLOCK_DEDICATED_ROUTE FALSE/ANY_CMT_COLUMN/BACKBONE

(4)As a reference, we are changing to BUFH due to lack of BUFG. (It is not the supply clock to each part above)

 

[4]Questions

(1) Do you have a track record of operating the evaluation board "NetFPGA-SUME" with the combination of the above configurations?

(2) Are there any combinations of configurations that you want to achieve that are impossible? For example, PCIe + DDR3 cannot be used simultaneously due to pin assignments, etc.