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AR# 43163

MIG Spartan-6 MCB - Simulation Debug Signals


This section of the MIG Design Assistant focuses on the SimulationDebug Signals description for the Spartan-6 MCBdesigns.

Note:This Answer Record is part of the Xilinx MIG Solution Center (Xilinx Answer 34243).The Xilinx MIG Solution Center is available to address all questions related to MIG.Whether you are starting a new design with MIG or troubleshooting a problem, use the MIG Solution Center to guide you to the right information.


The UNISIM model of the MCB primitive within the top-level MIG wrapper is encrypted, preventing access to internal nodes. However, some additional signals that might be useful in simulation debug have been made accessible by bringing them to the top level of the UNISIM model. These signals can only be viewed in simulation; they are not accessible in hardware. The signals are located in the hierarchy path */memc*_mcb_raw_wrapper_inst/samc_0/B_MCB_INST.

Clock Debug Signals

The clock frequency should be thesame as the memory frequency.

Controller Debug Signals

These signals show calibration processes and commandexecution.Ctrl_state shows the controller FSM states, which can help to locate initialization errors.

Calibration Debug Signals

These signals show calibration logic processes.Cal_state can show which state is in an error state and helps to locate the calibration error.

Arbiter and Data Capture Debug Signals

These signals show arbiter status and read data status.These signals can help to locate port commands execution order and read data error problems.

For more information on thestate machine description, please see theSpartan-6 FPGA Memory Interface Solutions User Guide(UG416):

Linked Answer Records

Associated Answer Records

Answer Number Answer Title Version Found Version Resolved
43162 MIG Spartan-6 MCB - User Design Simulation Debug N/A N/A
43166 MIG Spartan-6 MCB - SecureIP Simulation N/A N/A
AR# 43163
Date 12/15/2012
Status Active
Type General Article
  • Spartan-6 LX
  • Spartan-6 LXT
  • Spartan-6Q
  • MIG
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