2.5. HPS EMIF Design Considerations
A critical component to the HPS is its external SDRAM memory. The following design considerations help you properly design the interface between SDRAM memory and the HPS.
When connecting external SDRAM to the HPS, refer to the following EMIF planning tools and essential documentation:
EMIF Planning Tools
|External Memory Interfaces IP - Support Center||The External Memory Interfaces IP - Support Center is a collection of tools and documentation resources to aid in the design of external memory interfaces for Intel® FPGAs.|
|EMIF Device Selector||This is an easy to use tool for quickly identifying a list of Intel® Stratix® 10 SoC device packages based upon the type and performance characteristics of each external memory interface in your application. The tool reports on remaining general purpose I/O as well as transceiver counts for each device package in the list.|
|EMIF Spec Estimator||This is an easy to use tool to determine the required SoC device speed grade once you have identified device packages that can implement the number, type and performance characteristics of your application memory interfaces.|
For more information about EMIF IP generation and Intel® Quartus® Prime compilation and timing closure aids, refer to the External Memory Interfaces IP - Support Center website.
|Intel® Stratix® 10 General Purpose I/O User Guide||
The Intel® Stratix® 10 General Purpose I/O User Guide describes the I/O column architecture and where the specific Hard Memory Controller block accessible to the HPS resides.
For guidance on connecting the HPS-accessible hard memory controller block to the HPS, study Section 1.3: Modular I/O Banks Location and Pin Counts in Stratix 10 Devices of the General Purpose I/O User Guide. This section shows the I/O column and bank locations for all device and package combinations across all Intel® Stratix® 10 family variants, including the relative location of the HPS to its accessible banks.
|External Memory Interfaces Intel® Stratix® 10 FPGA IP User Guide||
The Intel® Stratix® 10 External Memory Interfaces User Guide includes the details required to understand what specific I/O banks are used for HPS external memory interfaces and where address/command, ECC and data signals are located. The user guide also consists of important information on restrictions on the placement of these external memory interface signals within the banks and any flexibility the designer has in varying from the default placement. While Intel recommends that you familiarize yourself with all the content available in this user guide, understanding the following sections is a prerequisite to properly design the Intel® Stratix® 10 EMIF for the HPS IP in your application.
The following design guidelines supplement the information found in the above referenced documentation.
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