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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| External USB | USBRBIAS | AI | Used for setting HS transmit current level and on- |
1 | Bias Resistor |
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| 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 LAN9512 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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| Table 2.5 Ethernet PHY Pins | ||
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NUM |
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| BUFFER |
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PINS | NAME | SYMBOL | TYPE | DESCRIPTION |
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| Ethernet TX | TXN | AIO | Negative output of the Ethernet transmitter. The |
1 | Data Out |
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| transmit data outputs may be swapped internally |
Negative |
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| with receive data inputs when | |
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| ||
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| enabled. |
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| Ethernet TX | TXP | AIO | Positive output of the Ethernet transmitter. The |
1 | Data Out |
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| transmit data outputs may be swapped internally |
Positive |
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| with receive data inputs when | |
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| ||
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| enabled. |
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| Ethernet RX | RXN | AIO | Negative input of the Ethernet receiver. The receive |
1 | Data In |
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| data inputs may be swapped internally with |
| Negative |
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| transmit data outputs when |
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| Ethernet RX | RXP | AIO | Positive input of the Ethernet receiver. The receive |
1 | Data In Positive |
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| data inputs may be swapped internally with |
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| transmit data outputs when |
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| +3.3V Analog | VDD33A | P | Refer to the LAN9512 reference schematics for |
7 | Power Supply |
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| connection information. |
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1 | External PHY | EXRES | AI | Used for the internal bias circuits. Connect to an |
Bias Resistor |
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| external 12.4K 1.0% resistor to ground. | |
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| ||
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| Ethernet PLL | VDD18ETHPLL | P | Refer to the LAN9512 reference schematics for |
1 | +1.8V Power |
|
| additional connection information. |
| Supply |
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SMSC LAN9512 | 13 | Revision 1.0 |
| DATASHEET |
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