Host controller structural parameters
| N_PORTS | Number of downstream ports. This field specifies the number of physical downstream ports implemented on this host controller. |
| PPC | Port Power Control. This field indicates whether the host controller implementation includes port power control. |
| RESERVED | These bits are reserved and should be set to zero. |
| N_PCC | Number of Ports per Companion Controller. This field indicates the number of ports supported per internal Companion Controller. |
| N_CC | Number of Companion Controller. This field indicates the number of companion controllers associated with this USB2.0 host controller. |
| PI | Port indicators. This bit indicates whether the ports support port indicator control. |
| RESERVED | These bits are reserved and should be set to zero. |
| N_PTT | Number of Ports per Transaction Translator. This field indicates the number of ports assigned to each transaction translator within the USB2.0 host controller. |
| N_TT | Number of Transaction Translators. This field indicates the number of embedded transaction translators associated with the USB2.0 host controller. |
| RESERVED | These bits are reserved and should be set to zero. |