External EEPROM can be removed if no vendor specified PID/VID or product string is required for the application.

The microprocessor detects general purpose I/O (GPIO) status during the initial stage to configure hub settings such as (1) number of DSport, (2) declare of compound device (3) gang/individual mode selection…etc. GL852G implements multiple hub configuration features onto internal mask ROM, which traditionally requires one external EEPROM. GL852G has proven compatibility, lower power consumption figure and better cost structure above all USB2.0 hub solutions worldwide. The controller inherits Genesys Logic’s cutting edge technology on cost and power efficient serial interface design. GL852G implements multiple TT* (Note1) architecture that provide dedicated TT* to each downstream (DS) ports, which guarantee Full-Speed(FS) data passing bandwidth when multiple FS device perform heavy loading operations. GL852G is Genesys Logic’s premium 4-port Hub solution which fully complies with Universal Serial Bus Specification Revision 2.0.

Genesys logic usb hub driver