Description
In the Quartus® II software versions 4.2 and 5.0, designs using the M4K blocks in Stratix II devices may be susceptible to intermittent read failures due to an issue with the configuration bit settings for the M4K memory blocks.
Refer to the Stratix II FPGA Family Errata Sheet for a description of the issue and an explanation of the memory configurations that can be affected. This issue does not affect your design if it was compiled in the Quartus II software versions 5.0 SP2, 5.1, or above.
To determine if your specific design is affected by the issue, refer to the following solution: How can I find out if my design is affected by the Stratix II M4K issue if I'm using the Quartus II software version 4.2 or 5.0?
