Intel® Quartus® Prime Standard Edition User Guide: Power Analysis and Optimization

ID 683506
Date 9/24/2018
Document Table of Contents

2.5.6. DDR Memory Controller Settings

The Intel® Arria® 10 EMIF IP DDR3 controller provides low power mode options. These options put DDR in Power saving mode when the controller is idle, providing power savings on External Memory DDR. These options are ​Enable Auto Power-Down​ and Auto Power-Down Cycles​.

Power-Down Mode

Enable Auto Power-Down directs the controller to place the memory device in power-down mode after a specific number of idle controller clock cycles. You can configure the idle wait time. All ranks must be idle to enter auto power-down.

Auto Power-Down Cycles Number of cycles the controller must be IDLE before entering power down state. You determine the number based on the traffic pattern. If the number is too small, the control enters power down too frequently, affecting efficiency. The Intel® Arria® 10 device family supports from 1 to 65534 cycles.

Figure 28.  Intel® Arria® 10 EMIF Controller Parameters


Directs the Controller to self-refresh when not sending traffic for very long period. Self-refresh takes more time compared to power down, but the power saving is higher than power down.