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

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

5.3.1. Data Reordering

The controller implements data reordering to maximize efficiency for read and write commands. The controller can reorder read and write commands as necessary to mitigate bus turn-around time and reduce conflict between rows.

Inter-bank data reordering reorders commands going to different bank addresses. Commands going to the same bank address are not reordered. This reordering method implements simple hazard detection on the bank address level.

The controller implements logic to limit the length of time that a command can go unserved. This logic is known as starvation control. In starvation control, a counter is incremented for every command served. You can set a starvation limit, to ensure that a waiting command is served immediately, when the starvation counter reaches the specified limit.

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