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AR# 24841

MPMC2 GUI v1.7 - Memory size does not appear to be correctly calculated with dual DIMMs


The system uses dual DIMMs and the MPMC2 IP Configurator correctly indicates the amount of memory in the system. What steps need to be taken?

The system uses dual DIMMs and the MPMC2 IP Configurator did not generate the number of chip-selects that I require in my system? How do I increase the number of chip-select pins?


Though the MPMC2 IP Configurator does not display the correct amount of memory in the system, the code generated is correct, except for the number of chip-selects required for a dual DIMM system. This is a known issue with the MPMC2 IP Configurator, and will be corrected in the next release.

In order to correctly drive the dual DIMMs, you will need to increase the number of chip-selects that are being driven from the MPMC2 Pcore. To increase the number of pins, you need to increase the value of the C_MPMC2_0_MEM_CS_N_WIDTH to the correct number of chip-selects for your system.

(Xilinx Answer 24815): MPMC2 GUI v1.7 - Memory Configuration requires more chip selects than what the GUI generates
AR# 24841
Date 11/12/2010
Status Archive
Type General Article
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