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Visible to Intel only — GUID: iga1401314930426
Ixiasoft
Visible to Intel only — GUID: iga1401314930426
Ixiasoft
33.3.1. Memory Profile Page
Settings | Allowed Values | Default Values | Description | |
---|---|---|---|---|
Data Width | 8, 16, 32, 64 | 32 | SDRAM data bus width. This value determines the width of the dq bus (data) and the dqm bus (byte-enable). | |
Architecture Settings | Chip Selects | 1, 2, 4, 8 | 1 | Number of independent chip selects in the SDRAM subsystem. By using multiple chip selects, the SDRAM controller can combine multiple SDRAM chips into one memory subsystem. |
Banks | 2, 4 | 4 | Number of SDRAM banks. This value determines the width of the ba bus (bank address) that connects to the SDRAM. The correct value is provided in the data sheet for the target SDRAM. | |
Address Width Settings | Row | 11, 12, 13, 14 | 12 | Number of row address bits. This value determines the width of the addr bus. The Row and Column values depend on the geometry of the chosen SDRAM. For example, an SDRAM organized as 4096 (212) rows by 512 columns has a Row value of 12. |
Column | >= 8, and less than Row value | 8 | Number of column address bits. For example, the SDRAM organized as 4096 rows by 512 (29) columns has a Column value of 9. | |
Share pins via tri-state bridge dq/dqm/addr I/O pins | On, Off | Off | When set to No, all pins are dedicated to the SDRAM chip. When set to Yes, the addr, dq, and dqm pins can be shared with a tristate bridge in the system. In this case, select the appropriate tristate bridge from the pull-down menu. | |
Include a functional memory model in the system testbench | On, Off | On | When on, Platform Designer functional simulation model for the SDRAM chip. This default memory model accelerates the process of creating and verifying systems that use the SDRAM controller. See Hardware Simulation Considerations section. |
Based on the settings entered on the Memory Profile page, the wizard displays the expected memory capacity of the SDRAM subsystem in units of megabytes, megabits, and number of addressable words. Compare these expected values to the actual size of the chosen SDRAM to verify that the settings are correct.