184.108.40.206. Using Dual-port RAM Threshold
The IP core implements any dual-port memory in a block memory rather than logic elements, but for some device families different sizes of block memory may be available. The threshold value determines which medium-size RAM memory blocks IP core implements instead of small-memory RAM blocks. For example, the threshold that determines whether to use M9K blocks rather than MLAB blocks on Stratix IV devices.
- Set the default threshold value, to implement dual memories greater than 1,280 bits as M9K blocks and dual memories less than or equal to 1,280 bits as MLABs.
- Change this threshold to a lower value such as 200, to implement dual memories greater than 200 bits as M9K blocks and dual memories less than or equal to 200 bits as MLAB blocks.
Note: For device families with only one type of memory block, this threshold has no effect.
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