USB 2.0
Datasheet
Please see the Internal Register Set (Common to EEPROM and SMBus) for a list of the available data fields. Please visit www.smsc.com/ftpdocs/usb.html to locate the configuration utility for the hub EEPROM data. Select the “e2prommap.msi” link to download the tool.
Each register has R/W capability. SMBUS and EEPROM Reset Values are 0x00. Reserved registers should be written to ‘0’ unless otherwise specified. Contents read should be ignored (such as the case of ‘R’ in the table below).
8.2.1Internal Register Set (Common to EEPROM and SMBus)
Table 8.2 Internal Default, EEPROM and SMBus Register Memory Map
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| DEFAULT ROM VALUES (HEXIDECIMAL) |
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| ADDRESS | REGISTER NAME | USB2512/12i |
| USB2512A/12Ai | USB2513/13i |
| USB2514/14i |
| USB2512B/12Bi |
| USB2513B/13Bi | USB2514B/14Bi | USB2517/17i |
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| 00h | Vendor ID LSB |
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| 24 |
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| 01h | Vendor ID MSB |
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| 04 |
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| 02h | Product ID LSB |
| 12 | 13 |
| 14 |
| 12 |
| 13 | 14 | 17 |
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| 03h | Product ID MSB |
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| 25 |
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| 04h | Device ID LSB | 00 |
| A0 |
| 00 |
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| A0 |
| 00 |
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| 05h | Device ID MSB | 00 |
| 0A |
| 00 |
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| 0B |
| 00 |
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| 06h | Configuration Data Byte 1 |
| 8B |
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| 9B |
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| 07h | Configuration Data Byte 2 |
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| 20 |
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| 08h | Configuration Data Byte 3 |
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| 02 |
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| 09h |
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| 00 |
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| 0Ah | Port Disable (Self) | 08 |
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| 00 |
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| 0Bh | Port Disable (Bus) | 08 |
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| 00 |
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| 0Ch | Max Power (Self) |
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| 01 |
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| 0Dh | Max Power (Bus) |
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| 32 |
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| 0Eh | Hub Controller Max Current (Self) |
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| 01 |
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| 0Fh | Hub Controller Max Current (Bus) |
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| 32 |
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| 10h |
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| 32 |
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| 11h | Language ID High |
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| 00 |
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| 12h | Language ID Low |
| R |
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| 00 |
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| 13h | Manufacturer String Length |
| R |
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| 00 |
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| 14h | Product String Length |
| R |
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| 00 |
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| 15h | Serial String Length |
| R |
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| 00 |
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| Manufacturer String |
| R |
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| 00 |
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SMSC USB251x | 35 |
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| Revision 1.0 | ||||
DATASHEET