General Description

ASM2464PD, is a new generation of USB4 ®/Thunderbolt to PCIe/NVMe Accessory controller based on ASMedia in-house designed PHYs. USB4/Thunderbolt technology enables PCIe and USB protocols to be encapsulated into the USB4/Thunderbolt fabric and tunneled across USB4/Thunderbolt domains. ASM2464PD can be implemented in various types of storage devices such as portable SSD, SSD enclosure, and any other PCIe based storage products that can be used to expand storage capacity with high-speed data transfers.

The ASM2464PD USB connection is able to provide data rate at a speed of USB4/Thunderbolt 20Gbps x2 and is compatible with existing legacy USB 3.2 interfaces, as well as Thunderbolt 3. In addition, the downstream port link of ASM2464PD is also upgraded to PCIe Gen4 x4 to support various NVM Express based M.2, CFexpress, and U.2 form factors.

ASM2464PD integrates USB4/Thunderbolt Gen3 x2, and PCI Express Gen4 with VDD, VCCL, VCCH voltage power source. A USB Type-C CC logic circuit and BMC PHY are integrated for supporting cable orientation, flipping, and PD Sink mode with the capability to communicate via PD protocols including USB4/TBT3 Discovery and Entry with host. ASM2464PD is driven by local 25MHz crystal in a compact RoHS Green compact package with the support of multiple GPIO pins for customization.


General Features

  • USB4/Thunderbolt to PCI Express NVMe SSD Bridge.
  • Integrated two USB 20Gbps PHYs.
  • Integrated UFP CC Logic for USB Type-C cable orientation and detection.
  • Integrated BMC PHY for PD fixed 5V UFP/Sink mode.
  • VCCH/VCCL/VDD Power Supply.
  • Support SPI interface with External ROM for Customized RAM Code.
  • Support I2C and GPIOs and UART Interface.
  • Local 25MHz Crystal.

Universal Serial Bus Features

  • Support up to USB4/Thunderbolt Gen3 x2 with USB 3.2 and USB 2.0 (backward compatibility).
  • Support BOT and UAS Protocol.
  • Support USB Link Power Management.
  • Support USB Hot Plug.
  • Support Spread Spectrum Clock Control.
  • Support UNMAP Command Set.
  • Support SCSI Vendor Specific Command Set.
  • Compliant with Universal Serial Bus 4 (USB4 ®) Specification Rev. 1.0 (including Interoperability with Thunderbolt™ 3 (TBT3) Systems)
  • Compliant with Universal Serial Bus Type-C Cable and Connector Specification Revision 2.1
  • Compliant with Universal Serial Bus Power Delivery Specification Revision 3.1 Version 1.3

PCI Express Features

  • Support up to PCI Express Gen4 x4.
  • Support PCI Express NVMe SSD.
  • Support Spread Spectrum Clock Control.
  • 100MHz Differential Reference Clock Output.
  • Support Various Types of PCI Express Socket including M.2, U.2, U.3 and CFexpress.
  • Support PCI Express Link Power Management.
  • Compliant with PCI Express Base Specification Rev. 4.0
  • Compliant with PCIe M.2 Specification Rev. 1.1

NVM Express Features

  • Support NVMe Power Management.
  • Support NVMe: SCSI Translation Reference Rev. 1.5
  • Support NVMe Error Reporting & Recovery.
  • S.M.A.R.T Drive Monitoring.
  • Compliant with NVM Express Base Specification Rev. 1.4c

Package Type

Green Package 10x10 mm² FCCSP (Pb-free).

RoHS Compliance.

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