External Memory Interfaces (EMIF) IP User Guide: Agilex™ 5 FPGAs and SoCs

ID 817467
Date 7/07/2025
Public
Document Table of Contents

3.2. Agilex™ 5 EMIF Architecture: Protocol and Maximum Supported Capacity

The following tables summarize the maximum supported capacity for various protocols.

Table 5.  Maximum Supported Capacity for DDR4 Protocol on Agilex™ 5 Devices
Protocol Die Density Memory Format Configuration Rank Base DRAM Width Memory Capacity per Channel, GB
Fabric EMIF HPS EMIF
DDR4 16Gb Component x32 + ECC 1 x8 8 8
1 x16 4 4
2 x8 16 16
2 x16 8 8
x40 1 x8 10 Not supported
1 x16 5 Not supported
2 x8 20 Not supported
2 x16 10 Not supported
UDIMM x64 + ECC 1 x8 16 Not supported
1 x16 8 Not supported
2 x8 32 Not supported
SODIMM x64 + ECC 1 x8 16 Not supported
1 x16 8 Not supported
2 x8 32 Not supported
RDIMM x64 + ECC 1 x4 32 Not supported
1 x8 16 Not supported
2 x4 64 Not supported
2 x8 32 Not supported
UDIMM x72 1 x8 18 Not supported
1 x16 9 Not supported
2 x8 36 Not supported
SODIMM x72 1 x8 18 Not supported
1 x16 9 Not supported
2 x8 36 Not supported
RDIMM x72 1 x4 36 Not supported
1 x8 18 Not supported
2 x4 72 Not supported
2 x8 36 Not supported
Note:
  • 3DS support is not available.
  • x40 and DIMM support are available on Agilex™ 5 D-Series fabric EMIF only.
Table 6.  Maximum Supported Capacity for DDR5 Componewnt Interface on Agilex™ 5 Devices
Protocol Die Density Memory Format Configuration Rank Base DRAM Width Memory Capacity per Channel, GB
Fabric EMIF HPS EMIF
DDR5 32Gb Component 1ch x32 + ECC 1 x8 16 16
1 x16 8 8
2 x8 32 32
2 x16 16 16
1ch x 40 1 x8 20 Not supported
1 x16 10 Not supported
2 x8 40 Not supported
2 x16 20 Not supported
Note:
  • 3DS support is not available.
  • x40 support is available on Agilex™ 5 D-Series fabric EMIF only.
Table 7.  Maximum Supported Capacity for DDR5 DIMM Interface on Agilex™ 5 Devices
Protocol Die Density Memory Format Configuration Rank Base DRAM Width DIMM Capacity, GB
Fabric EMIF HPS EMIF
DDR5 32 Gb UDIMM 2ch x32 + ECC 1 x8 32 32
1 x16 16 16
2 x8 64 64
SODIMM 1 x8 32 32
1 x16 16 16
2 x8 64 64
RDIMM 1 x4 64 64
1 x8 32 64
2 x4 128 128
2 x8 64 64
Note:
  • 3DS support is not available.
  • Single sub-channel implementation is not supported; you must configure and use both sub-channels for a DIMM.
  • x40 support is available on Agilex™ 5 D-Series fabric EMIF only.
Table 8.  Maximum Supported Capacity for LPDDR4 Protocol on Agilex™ 5 Devices
Configuration Rank Die Densitty DIMM Capacity, GB
Fabric EMIF HPS EMIF
1ch x32 1 16 Gb 4 4
1ch x32 2 16 Gb 8 8
2ch x16 1 16 Gb 2 2
2ch x16 2 16 Gb 4 4
Table 9.  Maximum Supported Capacity for LPDDR5 Protocol on Agilex™ 5 Devices
Configuration Rank Die Densitty DIMM Capacity, GB
Fabric EMIF HPS EMIF
1ch x32 1 32 Gb 8 8
1ch x32 2 32 Gb 16 16
2ch x16 1 32 Gb 4 4
2ch x16 2 32 Gb 8 8