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AR# 39073

MIG Spartan-6 MCB - Does the MCB support 4 Gb memories?


The "Supported Memory Configurations" in the Spartan-6 FPGA Memory Controller User Guide (UG388) indicates that 4 Gb DDR3 is supported, but on the CORE Generator interface, there is no 4 Gb memory part available.

Does the MCB support 4 Gb memories? What about stacked/dual-die memory devices?


The Spartan-6 MCB supports 4 Gb monolithic memories. To interface with a 4 Gb SDRAM part, the Create Custom Part feature must be used. A 4Gb memory can be achieved with the address bits configured as either row:15, col:11, bank:3, or row:14, col:12, bank:3. However, the Spartan-6 MCB does not support dual-die or twin-die memories because the read capture circuit of the MCB does not support the stacked die.

Linked Answer Records

Associated Answer Records

Answer Number Answer Title Version Found Version Resolved
37541 MIG Spartan-6 Memory Controller Block (MCB) Core - Data Widths N/A N/A
AR# 39073
Date Created 08/12/2011
Last Updated 11/27/2013
Status Active
Type General Article
  • Spartan-6 LX
  • Spartan-6 LXT
  • Spartan-6Q
  • MIG