• USB 3.2 Gen2x1 to SD7.1
  • Support PCIe Gen3 and NVMe 1.3 protocol
  • Support SDUC specification


JMS581SD is a system on chip solution which embedded with USB 3.2 Gen2x1 10Gb/s to SD7.1 interfaces. Its upstream port provides a USB which data speed can reach up to 10Gb/s. Meanwhile, its downstream port can connect to UHS-I and SD7.1 memory card, which can achieve up to maximum 985MB/s data transfer rate. It can also backward compatible with the legacy SD card specification. Furthermore, JMS581SD enable to meet with the latest SD Ultra Capacity (SDUC) card specification, which can offer the theoretical capacity up to 128TB.

Key Features

  • Comply with USB 3.2 Gen 1 and Gen 2 Specification,
  • Comply with USB Mass Storage Class, Bulk-Only Transport Specification (Revision 1.0)
  • Comply with USB Attached SCSI Protocol (UASP) Specification (Revision 4)
  • Integrate with USB Type-C multiplexer & configuration channel (CC) logic
  • Support SD3.01 UHS-I
  • Support SD7.1 (PCIe Gen3x1 NVMe 1.3)

Block Diagram

581SD block diagram