This is a user guide from Altera Corporation, introducing the use of ALTDLL and ALTDQ_DQS Megafunctions.
The ALTDLL and ALTDQ_DQS megafunctions provide a solution for creating custom external memory interface physical layer (PHY) blocks. The ALTDLL megafunction configures the dedicated DQS phase-shift circuitry, while the ALTDQ_DQS megafunction implements the read and write PHY required for the interface. These tools are designed for specialized or customized intellectual property (IP) for external memory interfaces not supported by Altera's standard IP.
| Memory Burst Length Support | Memory burst lengths of two |
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The ALTDQ_DQS megafunction implements the read and write PHY required for the interface and supports RLDRAM II memory interfaces.