• USB 3.2 Gen 2 to SD7.1/8.0
  • Support PCIe Gen3 and NVMe 1.3 protocol
  • Support SDUC specification


JMS581SD is a system on chip solution which embedded with USB 3.2 Gen 2 to SD7.1/8.0 interfaces. Its upstream port provides a USB which data speed can reach up to 10Gbps. Meanwhile, its downstream port can connect to UHS-I and SD8.0 memory card, which can achieve up to maximum 1969MB/s theoretical 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 SD8.0 (PCIe Gen3x2 NVMe 1.3)

Block Diagram

Block Diagram