USB 2.0
Datasheet
BIT |
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NUMBER | BIT NAME |
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0 | PORT_PWR | Port Power Switching: Enables power switching on all ports simultaneously | |
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| (ganged), or port power is individually switched on and off on a port- | |
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| basis (individual). The ability to support power enabling on a port or ganged | |
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| basis is hardware implementation dependent. | |
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| 0 | = Ganged switching (all ports together) |
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| 1 | = Individual |
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4.2.1.8Register 07h: Configuration Data Byte 2
BIT |
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NUMBER | BIT NAME | DESCRIPTION |
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7 | DYNAMIC | Dynamic Power Enable: Controls the ability of the Hub to automatically |
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| change from |
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| power source is removed or is unavailable (and from |
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| Powered if the local power source is restored). {Note: If the local power |
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| source is available, the Hub will always switch to |
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| When Dynamic Power switching is enabled, the Hub detects the availability |
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| of a local power source by monitoring the external LOCAL_PWR pin. If the |
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| Hub detects a change in power source availability, the Hub immediately |
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| disconnects and removes power from all downstream devices and |
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| disconnects the upstream port. The Hub will then |
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| port as either a |
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| Powered Hub (if local power is available). |
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| 0 = No Dynamic |
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| 1 = Dynamic |
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6 | Reserved | Reserved |
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5:4 | OC_TIMER | OverCurrent Timer: Over Current Timer delay. |
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| 00 = 0.1ms |
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| 01 = 4ms |
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| 10 = 8ms |
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| 11 = 16ms |
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3 | COMPOUND | Compound Device: Allows the OEM to indicate that the Hub is part |
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| of a compound (see the USB Specification for definition) device. The |
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| applicable port(s) must also be defined as having a |
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| Device". |
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| Note: When configured via strapping options, declaring a port as |
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| it is part of a compound device. |
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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 | Reserved |
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SMSC USB2512A | 17 | Revision 1.96 |
| DATASHEET |
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