• USB 3.1 Gen 1 to UFS 2.1/ UHS-I
  • Support embedded UFS memory
  • Support both UFS/SD cards in single card slot


JMS901 is an innovative and cost-effective USB 3.1 Gen 1 to UFS 2.1 and UHS-I bridge controller. It supports simultaneous data read/write to embedded UFS (eUFS) as well as dual kinds of flash memory cards, SD and UFS card. The JMS901 supports TRIM to the UFS (Universal Flash Storage) and can transmit and receive data by both of USB Mass Storage Class Bulk-Only Transport (BOT), and USB Attached SCSI Protocol (UASP) to and from the host respectively. Moreover, JMS901 can also compatible with UFS 3.0 which compatibility over UFS 2.1.

Key Features

  • Support TRIM to UFS
  • Integrate with USB Type-C multiplexer & configuration channel (CC) logic
  • Comply with USB Mass Storage Class, BOT (Revision 1.0) and USB Attached SCSI Protocol (UASP) Specification (Revision 4)
  • Support USB Super-Speed/High-Speed/Full-Speed Operation
  • Support USB 2.0/ USB 3.1 Gen 1 power saving mode
  • Support UFS 2.1 HS-G1A~HS-G3B & Type-I PWM G1~G5 in LS PWM mode
  • Support SDIO 3.1 (UHS-I, SDR104) with SD/SDHC/SDXC

Block Diagram