External Memory Interfaces Intel Agilex® 7 M-Series FPGA IP Design Example User Guide

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Date 4/03/2023
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Document Table of Contents
Document Table of Contents x
1. About the External Memory Interfaces Intel Agilex® 7 M-Series FPGA IP 2. Design Example Quick Start Guide for External Memory Interfaces Intel Agilex® 7 M-Series FPGA IP 3. Design Example Description for External Memory Interfaces Intel Agilex® 7 M-Series FPGA IP 4. Document Revision History for External Memory Interfaces Intel Agilex® 7 M-Series FPGA IP Design Example User Guide
1. About the External Memory Interfaces Intel Agilex® 7 M-Series FPGA IP x
1.1. Release Information
2. Design Example Quick Start Guide for External Memory Interfaces Intel Agilex® 7 M-Series FPGA IP x
2.1. Creating an EMIF Project 2.2. Generating and Configuring the EMIF IP 2.3. Configuring DQ Pin Swizzling 2.4. Generating the Synthesizable EMIF Design Example 2.5. Generating the EMIF Design Example for Simulation 2.6. Pin Placement for Intel Agilex® 7 M-Series EMIF IP 2.7. Compiling the Intel Agilex® 7 M-Series EMIF Design Example
2.1. Creating an EMIF Project x
2.1.1. Generating a Custom Memory Presets File
2.1.1. Generating a Custom Memory Presets File x
2.1.1.1. Memory Device Description IP Parameter Editor Guidelines 2.1.1.2. Saving a Memory Device Presets File 2.1.1.3. Examples for Generating a Custom Memory Presets File
2.1.1.3. Examples for Generating a Custom Memory Presets File x
2.1.1.3.1. Generating a Custom Memory Preset File for DDR4 2.1.1.3.2. Guidelines for Selecting the DDR4 DRAM Component Package Type 2.1.1.3.3. Generating a Custom Memory Preset File for DDR5 2.1.1.3.4. Guidelines for Selecting the DDR5 DRAM Component Package Type 2.1.1.3.5. Generating a Custom Memory Preset File for LPDDR5
2.2. Generating and Configuring the EMIF IP x
2.2.1. Intel Agilex® 7 M-Series EMIF Parameter Editor Guidelines 2.2.2. Using Custom Memory Device Presets from a File
3. Design Example Description for External Memory Interfaces Intel Agilex® 7 M-Series FPGA IP x
3.1. Synthesis Design Example 3.2. Simulation Design Example 3.3. Example Design Tab
3.2. Simulation Design Example x
3.2.1. Running Simulation
1. About the External Memory Interfaces Intel Agilex® 7 M-Series FPGA IP
2. Design Example Quick Start Guide for External Memory Interfaces Intel Agilex® 7 M-Series FPGA IP
3. Design Example Description for External Memory Interfaces Intel Agilex® 7 M-Series FPGA IP
4. Document Revision History for External Memory Interfaces Intel Agilex® 7 M-Series FPGA IP Design Example User Guide

2.3. Configuring DQ Pin Swizzling

It is important to strictly follow the pin placement for a given memory topology when assigning pin locations for your EMIF IP.

Do not change the location for the EMIF pin using a .qsf assignment or the pin planner if you need to swap the DQ pins within a DQS group or the DQS group to simplify board design. For example, if you implement a x32 DDR4 interface, the EMIF pin location must adhere to the x32 column in the DDR4 Pin Placement table in the Product Architecture chapter of the External Memory Interfaces Intel Agilex® 7 M-Series FPGA IP User Guide. There is no flexibility to swap the address command pin location.

Example: DQ Pin Swizzling Within DQS group for x32 DDR4 interface

This example uses the lane placement of the following table, with a x8 DQ width.

Table 3.  Lane Placement for a x32 DDR4 Interface
Lane Number BL7 BL6 BL5 BL4 BL3 BL2 BL1 BL0
Default placement GPIO DQS[3] DQS[2] DQS[1] AC[2] AC[1] AC[0] DQS[0]
Table 4.  Example of Swizzling DQ pin in BL0 ( DQS group 0)
Lane Pin Index DDR4 x32 (Default Placement) After Swizzling / Swapping
BL0 11 MEM_DQ[7] MEM_DQ[6]
10 MEM_DQ[6] MEM_DQ[5]
9 MEM_DQ[5] MEM_DQ[7]
8 MEM_DQ[4] MEM_DQ[4]
7    
6 MEM_DM_N[0] MEM_DM_N[0]
5 MEM_DQS_C[0] MEM_DQS_C[0]
4 MEM_DQS_T[0] MEM_DQS_T[0]
3 MEM_DQ[3] MEM_DQ[0]
2 MEM_DQ[2] MEM_DQ[2]
1 MEM_DQ[1] MEM_DQ[1]
0 MEM_DQ[0] MEM_DQ[3]

To achieve this swizzling in DQS group 0, you must enter PIN_SWIZZLE_DQS0=3,1,2,0,4,7,5,6; in the User Extra Parameters field of the Additional Parameters tab in the Advanced Parameters section of the General IP Parameters tab in the External Memory Interfaces IP parameter editor.

Figure 23. Entering a PIN_SWIZZLE Specification
Table 5.  Example of Swizzling DQ pin in BL5 ( DQS group 2)
Lane Pin Index DDR4 x32 (from table) After Swizzling / Swapping
BL5 71 MEM_DQ[23] MEM_DQ[17]
70 MEM_DQ[22] MEM_DQ[22]
69 MEM_DQ[21] MEM_DQ[21]
68 MEM_DQ[20] MEM_DQ[20]
67    
66 MEM_DM_N[2] MEM_DM_N[2]
65 MEM_DQS_C[2] MEM_DQS_C[2]
64 MEM_DQS_T[2] MEM_DQS_T[2]
63 MEM_DQ[19] MEM_DQ[19]
62 MEM_DQ[18] MEM_DQ[18]
61 MEM_DQ[17] MEM_DQ[23]
60 MEM_DQ[16] MEM_DQ[16]

To achieve this swizzling in DQS Group 2, you must enter PIN_SWIZZLE_DQS2=16,23,18,19,20,21,22,17; in the User Extra Parameters field of the Additional Parameters tab in the Advanced Parameters section of the General IP Parameters tab in the External Memory Interfaces IP parameter editor.

Figure 24. Entering a PIN_SWIZZLE Specification

You can enter multiple specifications in the User Extra Parameters field, each separated by a comma.

Figure 25. Entering Multiple PIN_SWIZZLE Specifications

Example: Byte Swizzling for a x32 DDR4 interface, implemented with x8 DQS group

Table 6.  
Lane Number BL0 BL1 BL2 BL3 BL4 BL5 BL6 BL7
Default Placement DQ[0] AC[0] AC[1] AC[2] DQ[1] DQ[2] DQ[3] GPIO
After Byte Swizzling DQ[2] AC[0] AC[1] AC[2] DQ[1] DQ[0] DQ[3] GPIO
BYTE SWIZZLE 2 X X X 1 0 3 X

This example illustrates swizzling DQS group 0 with DQS group 2. The BYTE_SWIZZLE denotes the DQS group implemented in the lane after the swizzling. X indicates that the lane is not used as a data lane (meaning that it serves as an address/command lane or is not used by the EMIF interface).

To achieve this swizzling, you must enter BYTE_SWIZZLE=2,X,X,X,1,0,3,X”; in the User Extra Parameters field of the Additional Parameters tab in the Advanced Parameters section of the General IP Parameters tab in the External Memory Interfaces IP parameter editor.

Figure 26. Swizzling DQS group 0 with DQS group 2

Example : Combining Pin and Byte Swizzling

This example combines the two previous examples, entering the following swizzle parameters:

  • PIN_SWIZZLE_DQS0=3,1,2,0,4,7,5,6;
  • PIN_SWIZZLE_DQS2=16,23,18,19,20,21,22,17;
  • BYTE_SWIZZLE=2,X,X,X,1,0,3,X;

The following table shows the resulting pin placement after DQ pin and byte swizzling.

Table 7.  Example of resulting pin placement after DQ pin and byte swizzling
Lane Pin Index Default Effective Pinout
BL5 71 MEM_DQ[23] MEM_DQ[6]
70 MEM_DQ[22] MEM_DQ[5]
69 MEM_DQ[21] MEM_DQ[7]
68 MEM_DQ[20] MEM_DQ[4]
67    
66 MEM_DM_N[2] MEM_DM_N[0]
65 MEM_DQS_C[2] MEM_DQS_C[0]
64 MEM_DQS_T[2] MEM_DQS_T[0]
63 MEM_DQ[19] MEM_DQ[0]
62 MEM_DQ[18] MEM_DQ[2]
61 MEM_DQ[17] MEM_DQ[1]
60 MEM_DQ[16] MEM_DQ[3]
BL0 11 MEM_DQ[7] MEM_DQ[17]
10 MEM_DQ[6] MEM_DQ[22]
9 MEM_DQ[5] MEM_DQ[21]
8 MEM_DQ[4] MEM_DQ[20]
7    
6 MEM_DM_N[0] MEM_DM_N[2]
5 MEM_DQS_C[0] MEM_DQS_C[2]
4 MEM_DQS_T[0] MEM_DQS_T[2]
3 MEM_DQ[3] MEM_DQ[19]
2 MEM_DQ[2] MEM_DQ[18]
1 MEM_DQ[1] MEM_DQ[23]
0 MEM_DQ[0] MEM_DQ[16]
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