AR# 76449

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Design Advisory for Versal ACAP: Vcc_pmc must be connected to 0.7VDC if PUF is used

Description

This Answer Record covers a requirement on the VCC_PMC power rail if the Physically Unclonable Function (PUF) is going to be used on Versal ACAP devices.

For more information on how to sign up to receive notifications of new Design Advisories, see (Xilinx Answer 18683).

Solution

The VCC_PMC power rail must be connected to 0.7VDC if the Physically Unclonable Function (PUF) is going to be used on Versal ACAP devices.

  • Operation at higher VCC_PMC voltages (> 0.7VDC) might prevent the PUF from consistently regenerating the KEK and/or Unique ID over the device’s lifetime in a fielded device
  • Operating VCC_PMC at 0.7VDC affects the maximum Platform Management Controller (PMC) performance. See the relevant data sheet for details:
    • DS956 (Prime Series), DS957 (AI Series) or DS959 (Premium Series - available in the early access lounge)

See the Versal Security Manual (UG1508) for additional details:

https://www.xilinx.com/member/design_security.html#docs (access controlled site).

Contact your Xilinx FAE or file a Service Request for additional questions or assistance.

AR# 76449
Date 05/20/2021
Status Active
Type Design Advisory
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