CoreLink DMC-520

The Arm CoreLink DMC-520 Dynamic Memory Controller

Getting Started

The CoreLink DMC-520 Dynamic Memory Controller provides highest bandwidth with low latency access to DDR4 and DDR3 memory in server, networking, and high-performance computing applications. The DMC-520 provides for full DIMM support along with RAS (Reliability, Availability, and Serviceability) and advanced error correction features that are necessary for these infrastructure applications.

  • Delivers best performance with ECC and RAS for data transfers from SoC to high-density memory.
  • Best combination of features, power, cost, and performance.
  • Fast, single-port CHI.A interface for transferring data to DDR4 and DDR3 DRAM memories.

Diagram on enterprise for CCN502 to 512.


Features Details
AMBA interface CHI
System interface
System data width 128 bit
Configuration APB interface
Memory interfaces Single DFI 3.1 memory interface with configurable 1:1, 1:2, or 1:4 DFI frequency ratio
Memory types DDR3, DDR3(L),and DDR4
Memory width x40/x72 bit DRAM (includes 8 bits of ECC)
ECC SECDED or enhanced symbol-based ECC
QoS QoS based scheduling algorithm, non-blocking paths to DRAM through CCN
Low power All DRAM power modes are supported and hierarchical clock gating throughout the DMC

DMC-520 Block Diagram.

CoreLink DMC-520 key features

System Optimized DMC with support for single 128-bit wide AMBA 5 CHI system interface

  • Integrated TrustZone address space control functionality in system interface to provide secure memory access.

Support for advanced ECC, RAS,and DIMM capabilities

  • Includes both standard SECDED ECC and advanced symbol-based ECC for correcting failure of X4 chip.
  • DDR3, DDR3L, and DDR4 memories (up to DDR4-3200 speeds) with UDIMM, RDIMM, LRDIMM, and 3DS support.

Quality-of-Service (QoS)

  • QoS improvements over previous generation reducing average and maximum CPU latency.
  • End-to-end QoS optimized with CCN interconnect and Arm v8.x CPUs.

Industry-standard DFI 3.1 Interface

  • Proven interoperability with third-party DFI 3.1 compatible DDR PHYs.

CoreLink DMC-520 Characteristics

CoreLink DMC-520 supports DDR4 which is the most advanced infrastructure-class memory technology available today. DDR4 provides the highest bandwidth (up to 25GB/s per channel for DDR4-3200 Mbps) which supporting reliability and low power features necessary for high-end systems deployment. System-wide QoS for DMC-520 designed and tested with CoreLink CCN Family, Cortex A53, and Cortex A72 processors.

  • TRM
  • CoreLink DMC-520 Technical Reference Manual

    For system designers, system integrators and programmers who are designing a SoC, the Technical Reference Manual is the go-to resource.

    DMC-520 TRM
  • A guide on software optimization.
  • AMBA 5 CHI Specification

    CoreLink DMC-520 is built on AMBA CHI specification, which is Arm's advanced coherent interconnect for high data transfer bandwidths at GHz and above frequencies.

    AMBA specs

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