USB Host Controller

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Kurobox (HG) USB Host Controller

The Kurobox and the Kurobox HG both use a NEC μPD720101GJ-UEN USB Host Controller. The standard Kurobox comes with only one USB 2.0 port on the rear of the casing. The Kurobox HG, however, has a USB 2.0 port on the rear, as well as one on the front.


  • Compliant with Universal Serial Bus Specification Revision 2.0 (Data rate 1.5/12/480 Mbps)
  • Compliant with Open Host Controller Interface (OHCI) Specification for USB Rev 1.0a
  • Compliant with Enhanced Host Controller Interface (EHCI) Specification for USB Rev 1.0
  • PCI multi-function device consists of two OHCI host controller cores for full-/low-speed signaling and one EHCI host controller core for high-speed signaling.
  • Root hub with 5 (max.) downstream facing ports which are shared by OHCI and EHCI host controller cores.
  • All downstream facing ports can handle high-speed (480 Mbps), full-speed (12 Mbps), and low-speed (1.5 Mbps) transaction.
  • Configurable number of downstream facing ports (2 to 5)
  • 32-bit 33 MHz host interface compliant to PCI Specification release 2.2
  • Supports PCI Mobile Design Guide Revision 1.1
  • Supports PCI-Bus Power Management Interface Specification release 1.1
  • PCI bus bus-master access
  • System clock is generated by 30 MHz X’tal or 48 MHz clock input.
  • Operational registers direct-mapped to PCI memory space
  • Legacy support for all downstream facing ports. Legacy support features allow easy migration for motherboard implementation.
  • 3.3 V power supply, PCI signal pins have 5 V tolerant circuit.


It is possible to add another USB port to the front or to the back of the Kurobox.

See Also