External Memory Interface Handbook Volume 3: Reference Material: For UniPHY-based Device Families

ID 683841
Date 3/06/2023
Document Table of Contents

6. Functional Description—QDR II Controller

The QDR II and QDR II+ controllers translate memory requests from the Avalon Memory-Mapped (Avalon-MM) interface to AFI, while satisfying timing requirements imposed by the memory configuration. QDR II and QDR II+ SRAM have unidirectional data buses, therefore read and write operations are highly independent of each other and each has its own interface and state machine.