Type: Answers

Area: EMIF

Area: Intellectual Property

IP Product: DDR2 SDRAM Controller supporting ALTMEMPHY

Why DDRx High Performance Controller doesn't work on the hardware when certain Global Synthesis Option Switches of Quartus II software has been changed from its default setting?


Global synthesis option such as "IGNORE_LCELL_BUFFERS" might affect area outside the targeted design block for which you want to apply this option, for example, IPs such as DDR, DDR2 and DDR3 High Performance Controller, PCIe MegaCore might get affected by changing this option.

If the project has any Altera® IP, any changes to the default global synthesis option should not be applied. Instead, you should use assignment editor in Quartus® II sotftware to make specific synthesis assignments for particular part of the logic in your design.