SPRUHZ7K August 2015 – April 2024 AM5706 , AM5708 , AM5716 , AM5718 , AM5718-HIREL
The EMIF controller provides connectivity between the device and DDR3/DDR3L type of memories and manages data bus read/write accesses between external memories and the device subsystems which have access to the L3_MAIN interconnect and DMA capability too.
The EMIF features are introduced in Section 15.1.3 EMIF Overview of Section 15.1Memory Subsystem Overview.
The device includes one EMIF controller. Figure 15-45 shows an overview of this EMIF controller and also the connections to the other surrounding modules. As can be seen on Figure 15-45 the EMIF is not directly available on device pads. That is, it is not directly connected to the external SDRAM. There are a DDR PHYs and then DDR I/Os between the EMIF controller and external SDRAM. The EMIF controller, the DDR PHYs and the DDR I/Os work like a single unit to manage data exchanges to and from external memories. To achieve successful data transaction between an internal device initiator and external SDRAM all these three components must be used.
Figure 15-45 EMIF Controller Overview