Interfacing to the Core
The User Interface resembles a simple FIFO interface.
The nextdiagram shows the physical abstraction for theBANK, ROW, and COLUMN address scheme that the User Interface uses. This allows for a simple logical address interface.You can choose to select theBANK ROW COLUMN and ROW BANK COLUMN for optimal performance within the MIG tool.
The User Interface (UI) loadsa command to the FIFO command when both the user logicpX_cmd_en is asserted and pX_cmd_full is not asserted from the UI. The user logic must hold thecmd_en high one cycle with the valid command, burst length, andaddress value.
The next diagram shows a Write command example.
Available commands on the pX_cmd port are as follows:
You can issue the Refreshcommand by yourself, however, the core performs anauto-refresh of the memory at regular intervals and this cannot be disabled.For more details on sending specific commands and the addressing scheme, pleasesee the following: