USB Hub with Integrated 10/100 Ethernet Controller
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| Datasheet | |
| Table 3.4 Config Data Byte 1 Register (CFG1) Format (continued) |
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BITS | DESCRIPTION | DEFAULT |
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2:1 | Over Current Sense (CURRENT_SNS) | 01b |
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| Selects current sensing on a |
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| (only for |
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| or ganged basis is hardware implementation dependent. |
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| 00 = Ganged sensing (all ports together) |
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| 01 = Individual |
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| 1x = Over current sensing not supported (must only be used with Bus- |
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| Powered configurations!) |
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0 | Port Power Switching (PORT_PWR) | 1b |
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| Enables power switching on all ports simultaneously (ganged), or port power |
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| is individually switched on and off on a port by port basis (individual). The |
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| ability to support power enabling on a port or ganged basis is hardware |
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| implementation dependent. |
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| 0 = Ganged switching (all ports together) |
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| 1 = Individual port by port switching |
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Table 3.5 Config Data Byte 2 Register (CFG2) Format
BITS | DESCRIPTION | DEFAULT |
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7:6 | RESERVED | 00b |
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5:4 | Over Current Timer (OC_TIMER) | 01b |
| Over Current Timer delay |
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| 00 = 50ns |
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| 01 = 100ns (This is the recommended value) |
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| 10 = 200ns |
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| 11 = 400ns |
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3 | Compound Device (COMPOUND) | 1b |
| Allows the OEM to indicate that the Hub is part of a compound (see the USB |
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| Specification for definition) device. The applicable port(s) must also be |
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| defined as having a |
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| 0 = No |
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| 1 = Yes, Hub is part of a compound device |
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2:0 | RESERVED | 000b |
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Revision 1.0 | 30 | SMSC LAN9514 |
| DATASHEET |
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