ALTERA Double Data Rate I/O (ALTDDIO_IN, ALTDDIO_OUT, and ALTDDIO_BIDIR) Megafunctions User Guide 介绍了Altera的Double Data Rate I/O(ALTDDIO_IN、ALTDDIO_OUT和ALTDDIO_BIDIR)Megafunctions的功能和特性
ALTERA DQ (ALTDQ) and DQS (ALTDQS) Megafunctions User Guide 介绍了Altera公司的DQ (ALTDQ) and DQS (ALTDQS) Megafunctions