External Memory Interface Handbook Volume 3: Reference Material

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ID 683841
Date 7/24/2019
Public
Document Table of Contents

5.2.3. DRAM Power Saving Modes

The hard memory controller supports two DRAM power-saving modes: self-refresh, and fast/slow all-bank precharge powerdown exit. Engagement of a DRAM power saving mode can occur due to inactivity, or in response to a user command.

The user command to enter power-down mode forces the DRAM burst-scheduling bank-management logic to close all banks and issue the power-down command. You can program the controller to power down when the DRAM burst-scheduling queue is empty for a specified number of cycles; the DRAM is reactivated when an active DRAM command is received.

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