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amolkumar
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12 hours ago

QVLD pins on QDR-IV when AGILEX 7 EMIF IP does not use QVLD

Team,

We are using the CY7C4122KV13 / CY7C4142KV13 QDR-IV SRAM with the AGILEX  7 AGIB022R31A2I2VB.

The memory has QVLDA[1:0] and QVLDB[1:0] output pins that indicate valid read data.

 NOTE: The AGILEX  7 EMIF IP user guide (UG-20218, Section 7.3.3.5) states that the external memory interface IP does not use the QVLD signal.

 

Could you please advise what we should do with the QVLD pins?

  1. Should they be left unconnected on the board, or connected to FPGA pins?
  2. If connected, should they be assigned in the IP or left as general-purpose I/O (for debug only)?
  3. Is any termination or pull-up/pull-down required on these pins?

 

Please let us know the recommended handling.

Regards

amol

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