| USB Hub with Integrated 10/100 Ethernet Controller | |
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| Datasheet |
| Table 3.3 Hub Configuration (continued) |
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EEPROM |
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OFFSET | DESCRIPTION | DEFAULT |
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2Ah | Port Disable (Self) Register (PDS) | 00h |
| Disables 1 or more ports. |
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| 0 = Port is available |
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| 1 = Port is disabled |
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| During |
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| disabled, and are not available to be enabled or enumerated by a host controller. The |
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| ports can be disabled in any order, the internal logic will automatically report the |
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| correct number of enabled ports to the USB host, and will reorder the active ports in |
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| order to ensure proper function. |
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| Bit 7 = RESERVED |
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| Bit 6 = RESERVED |
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| Bit 5 = 1; Port 5 disabled |
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| Bit 4 = 1; Port 4 disabled |
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| Bit 3 = 1; Port 3 disabled |
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| Bit 2 = 1; Port 2 disabled |
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| Bit 1 = 1; Port 1 disabled |
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| Bit 0 is RESERVED, always = 0b |
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2Bh | Port Disable (Bus) Register (PDB) | 00h |
| Disables 1 or more ports. |
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| 0 = Port is available |
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| 1 = Port is disabled |
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| During |
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| disabled, and are not available to be enabled or enumerated by a host controller. The |
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| ports can be disabled in any order, the internal logic will automatically report the |
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| correct number of enabled ports to the USB host, and will reorder the active ports in |
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| order to ensure proper function. |
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| Bit 7 = RESERVED |
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| Bit 6 = RESERVED |
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| Bit 5 = 1; Port 5 disabled |
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| Bit 4 = 1; Port 4 disabled |
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| Bit 3 = 1; Port 3 disabled |
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| Bit 2 = 1; Port 2 disabled |
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| Bit 1 = 1; Port 1 disabled |
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| Bit 0 is RESERVED, always = 0b |
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2Ch | Max Power (Self) Register (MAXPS) | 01h |
| Value in 2mA increments that the Hub consumes from an upstream port (VBUS) when |
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| operating as a |
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| combined power consumption (from VBUS) of all associated circuitry on the board. |
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| This value also includes the power consumption of a permanently attached peripheral |
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| if the hub is configured as a compound device, and the embedded peripheral reports |
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| 0mA in its descriptors. |
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| Note: The USB2.0 Specification does not permit this value to exceed 100mA. |
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2Dh | Max Power (Bus) Register (MAXPB) | 00h |
| Value in 2mA increments that the Hub consumes from an upstream port (VBUS) when |
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| operating as a |
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| combined power consumption (from VBUS) of all associated circuitry on the board. |
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| This value also includes the power consumption of a permanently attached peripheral |
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| if the hub is configured as a compound device, and the embedded peripheral reports |
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| 0mA in its descriptors. |
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Revision 1.0 | 24 | SMSC LAN9514 |
| DATASHEET |
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