M88MX5891 is a Type 3 Compute Express Link^? (CXL^?) Memory eXpander Controller (MXC), which enables high-speed and low-latency interconnect between the CPU and CXL^?-based devices.

The MXC integrates a CXL^? controller, a DDR controller, a RISC-V microprocessor, and rich peripheral interfaces such as SMBus, I3C/I2C, and SPI in a single chip. It is compliant with JEDEC DDR4/DDR5 standards and CXL^? 2.0/PCIe^? 5.0 specifications.

As the key component for memory expansion and pooling, the MXC is intended for use in add-in cards (AICs) and EDSFF memory modules, enabling dramatically scaling of memory capacity and bandwidth to meet the ever-growing demand from HPC and AI applications.

Features

• CXL^? Type 3 Memory eXpander Controller
  • Integrated CXL^? controller, DDR controller and RISC-V micro-processor
  • On-chip PVT sensor
  • SMBus, I3C/I2C, and SPI interfaces
  • Package: 767-ball FCCSP
• CXL^? Controller
  • Compliant with CXL^? 1.1 and CXL^? 2.0 RAS specifications, supporting CXL^?.mem and CXL^?.io protocols
  • Designed based on PCIe^? 5.0 interface, supporting up to 32 GT/s data rate (x8 lanes)
  • Rich RAS features
• DDR Controller
  • Compliant with JEDEC DDR4/DDR5 standards
  • Support DDR4/DDR5 UDIMM/RDIMM and DRAM on-board
  • Support up to DDR4-3200 and DDR5-5600
  • Low power consumption
  • Optimized DDR I/O equalization and programmable I/O impedance

Application

• Add-in card or EDSFF memory module for memory expansion, memory pooling, etc.
• AI, machine learning, cloud infrastructure, high-performance computing, etc.