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Explorer
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Registered: ‎09-04-2015

VCU108 and VCU110 EVMs - Queries

Hi,

We are working on a UltraScale+ FPGA based design. We have few queries regarding VCU108 and VCU110 EVMs as mentioned below. Please check and let us know your comments.

  1. From the Xilinx VCU110 EVM BoM, we see that the QDRII+ IC used is of size 144Mb. But in the schematics symbol and part it is mentioned is 36Mb. Please confirm which part is used in EVM?
  2. To access SYSMON registers, the Xilinx’s VCU108 EVM uses two I2C voltage translators (PCA9306) to convert 1.8V rail to 3.3V rail and then back to 1.8V rail (via another PCA9306) instead of a direct connection from UltraScale FPGA Output to Input. Please let us know the need and use of these level translators.
  3. Also in our case, we need to read the SYSMON resistors. We are planning to directly connect the I2C lines from the FPGA to its own SYSMON interface pins. Please confirm if this is fine.
  4. In VCU108 EVM, VCCAUX/VCCAUX_IO/VCCO_0/VCCO_65/VCCO_84 /VCCO_94 is connected to VCC1V8_FPGA and VCCO_47/VCCO_48/VCCO_66/VCCO_67/VCCO_68 is connected to VADJ_1V8_FPGA. We believe this is done to power off the banks 47/48/66-68 when any FMC card is not connected. Please confirm.
  5. There is clock provision in VCU108 EVM to be derived from FPGA IOs for QSFP28. This is not being used and reference clock from external clock generator is being used. Is there any specific reason for the same? What is the recommended way of connection?
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Explorer
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Registered: ‎09-04-2015

Re: VCU108 and VCU110 EVMs - Queries

That post captures the queries regarding UltraScale+ documentation and this post captures queies regarding EVMs and hence they are in separate posts. This is not a repeat post. Please check.
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Registered: ‎09-04-2015

Re: VCU108 and VCU110 EVMs - Queries

Hi,

 

Can you please respond to the above queries? We are in design phase and the above queries are critical to proceed further.

 

Regards,

Raja

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