USB Hub with Integrated 10/100 Ethernet Controller
Datasheet
Table 2.4 USB Pins (continued)
NUM |
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| BUFFER |
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PINS | NAME | SYMBOL | TYPE | DESCRIPTION |
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| USB Port Power | PRTCTL2 | IS/OD12 | When used as an output, this pin enables power to |
| Control 2 |
| (PU) | downstream USB peripheral 2. |
1 |
|
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| When used as an input, this pin is used to sample |
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| the output signal from an external current monitor | |
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|
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| for downstream USB peripheral 2. An overcurrent |
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| condition is indicated when the signal is low. |
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| Refer to Section 2.1 for additional information. |
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| USB Port Power | PRTCTL3 | IS/OD12 | When used as an output, this pin enables power to |
| Control 3 |
| (PU) | downstream USB peripheral 3. |
1 |
|
|
| When used as an input, this pin is used to sample |
|
|
| the output signal from an external current monitor | |
|
|
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| for downstream USB peripheral 3. An overcurrent |
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| condition is indicated when the signal is low. |
|
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|
| Refer to Section 2.1 for additional information. |
|
|
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| USB Port Power | PRTCTL4 | IS/OD12 | When used as an output, this pin enables power to |
| Control 4 |
| (PU) | downstream USB peripheral 4. |
1 |
|
|
| When used as an input, this pin is used to sample |
|
|
| the output signal from an external current monitor | |
|
|
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| for downstream USB peripheral 4. An overcurrent |
|
|
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| condition is indicated when the signal is low. |
|
|
|
| Refer to Section 2.1 for additional information. |
|
|
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|
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| USB Port Power | PRTCTL5 | IS/OD12 | When used as an output, this pin enables power to |
| Control 5 |
| (PU) | downstream USB peripheral 5. |
1 |
|
|
| When used as an input, this pin is used to sample |
|
|
| the output signal from an external current monitor | |
|
|
|
| for downstream USB peripheral 5. An overcurrent |
|
|
|
| condition is indicated when the signal is low. |
|
|
|
| Refer to Section 2.1 for additional information. |
|
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| External USB | USBRBIAS | AI | Used for setting HS transmit current level and on- |
1 | Bias Resistor |
|
| chip termination impedance. Connect to an |
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| external 12K 1.0% resistor to ground. |
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| USB PLL +1.8V | VDD18USBPLL | P | Refer to the LAN9514 reference schematics for |
1 | Power Supply |
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| additional connection information. |
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| Crystal Input | XI | ICLK | External 25 MHz crystal input. |
1 |
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| Note: This pin can also be driven by a single- |
|
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| ended clock oscillator. When this method | |
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| |
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| is used, XO should be left unconnected |
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1 | Crystal Output | XO | OCLK | External 25 MHz crystal output. |
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SMSC LAN9514 | 13 | Revision 1.0 |
| DATASHEET |
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