General Description

Engaged in Universal Serial Bus I/O solutions and storage application developments, ASMedia Technology is committed on expanding product portfolio with introducing a new generation of USB 3.2 Gen2x1 to SATA 6Gbps bridge solution for USB Type-C storage application.

ASM235CM is the latest generation of ASMedia’s single chip solution, bridging the USB3.2 Gen2x1 to Serial ATA host interface with highly integrated SuperSpeedPlus, SuperSpeed, High Speed, SATA 1.5/3.0/6.0 Gbps ASMedia self-designed PHYs as well as built-in CC logic circuit enabling reversible USB cable orientation and direction. Along with excellent compatibility with USB3.2 hosts and SATA devices, ASM235CM utilizes advanced process technology to optimize the chip power consumption.

Customers can easily enhance their storage device performance with ASM235CM since it also integrates an 8-bit micro-processor and embedded RAM to provide a cutting edge solution in USB to SATA device enclosure market.


  • Compliant with USB3.1 Specification Revision 1.0
  • Compliant with Type-C Specification Revision 1.1
  • Compliant with USB Specification Revision 2.0
  • Support USB Super-Speed Plus, USB Super-Speed, High-Speed and Full-Speed Operation
  • Support USB Mass Storage Class, Bulk-Only Transport Specification Revision 1.3
  • Support USB Attached SCSI Protocol Specification Revision 1.0
  • Compliant with Serial ATA Specification Revision 3.2
  • Serial ATA bus up to 6Gbps Signal bandwidth
  • Support Spread Spectrum Control of USB3.0 and SATA interface to improve the EMI performance
  • Support ATA/ATAPI Packet Command Set
  • Support ATA/ATAPI LBA48 addressing mode(28-bit LBA SATA devices are not supported due to OS limitations)
  • Integrated 8-bit micro-processor with embedded program RAM and ROM
  • Support SPI NVRAM for Vender Specific Application of USB Device Controller
  • Support multi-GPIO pins
  • Support programmable PWMs
  • Support 25 MHz with external crystal mode
  • Integrated two internal voltage regulator for IO power and Core

Package Type

Green Package 6x6 QFN 48L (Pb-free)

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