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USB 2.0 Hi-Speed Hub Controller
Datasheet
SMSC USB251x 35 Revision 1.0 (3-11-09)
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).
8.2.1 Internal Register Set (Common to EEPROM and SMBus)
Table 8.2 Internal Default, EEPROM and SMBus Register Memory Map
ADDRESS REGISTER NAME
DEFAULT ROM VALUES (HEXIDECIMAL)
USB2512/12i
USB2512A/12Ai
USB2513/13i
USB2514/14i
USB2512B/12Bi
USB2513B/13Bi
USB2514B/14Bi
USB2517/17i
00h Vendor ID LSB 24
01h Vendor ID MSB 04
02h Product ID LSB 12 13 14 12 13 14 17
03h Product ID MSB 25
04h Device ID LSB 00 A0 00 A0 00
05h Device ID MSB 00 0A 00 0B 00
06h Configuration Data Byte 1 8B 9B
07h Configuration Data Byte 2 20
08h Configuration Data Byte 3 02
09h Non-Removable Devices 00
0Ah Port Disable (Self) 08 00
0Bh Port Disable (Bus) 08 00
0Ch Max Power (Self) 01
0Dh Max Power (Bus) 32
0Eh Hub Controller Max Current (Self) 01
0Fh Hub Controller Max Current (Bus) 32
10h Power-on Time 32
11h Language ID High 00
12h Language ID Low R 00
13h Manufacturer String Length R 00
14h Product String Length R 00
15h Serial String Length R 00
16h-53h Manufacturer String R 00