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AR# 42258

MIG 7 Series RLDRAMII - Can an x18 interface fit in a single bank?


When generating an x18 RLDRAMII interface through MIG, is it possible to fit an x18 RLDRAM interface into a single bank?


Yes, it is possible. Follow the steps below to achieve this:

  1. Remove the QVLD pins - QVLD is not used in the design.
  2. Disable Data Mask (DM) - The Data Mask can be disabled through the MIG 7 Series tool for designs not requiring the ability to mask data (tie the pins low on the board).
  3. Use Address Multiplexing Mode - Address Multiplexing mode reduces the address pin count from 20-22 bits down to 11 and will free up an extra byte lane in the Address/Control Bank. 
  4. Use Internal Vref; this allows the Vref pins to be used as GPIO, freeing up two pins per bank where inputs are used.
AR# 42258
Date 08/13/2014
Status Active
Type General Article
  • Kintex-7
  • Virtex-7
  • MIG
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