This post explains for the Controller.
The Part Number is ASM1053.
The package is 6×6 QFN 48L.
The function of this semiconductor is SuperSpeed USB to SATA Bridge Controller.
Preview images :
ASM1053 is the ASMedia 2nd generation single chip solution to bridge the SuperSpeed USB (USB3.0) and High Speed USB (USB2.0) to Serial ATA host interface. It is highly integrated with ASMedia SuperSpeed USB3.0, High Speed USB2.0 and SATA1.5/3.0 Gbps self-design PHYs.
Customers can easily enhaced their storage device performace via ASM1053 since it is also integrated 8-bit micro-processor and embedded RAM to provide a leading edge solution in USB to SATA device enclosure market. […]
. Compliant with USB3.0 Specification Revision 1.0
. Compliant with USB Specification Revision 2.0
. Support USB Super-Speed, High-Speed and Full-Speed Operation
. Support USB Mass Storage Class, Bulk-Only Transport Specification Revision 1.3
. Support UAS Attached SCSI Protocol Specification Revision 1.0
. Compliance with Serial ATA Specification Revision 2.6
. 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
. 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 two programmable PWM controller
. Support 20/25/30MHz with external crystal mode or 30MHz with Clock input mode via strapping
. Integrated internal 5V to 3.3V and 3.3V to 1.2V voltage regulator