Datasheet

USB 2.0 Hi-Speed Hub Controller
Datasheet
SMSC USB251xB/xBi 27 Revision 2.2 (02-17-12)
DATASHEET
5.1 Internal Register Set (Common to I
2
C EEPROM and SMBus)
The register set available when configuring the hub to interface over I
2
C or SMBus is outlined in the
table below. Each register has R/W capability, where EEPROM reset values are 0x00. Reserved
registers should be written to 0 unless otherwise specified. Contents read from unavailable registers
should be ignored.
ADDRESS REGISTER NAME DEFAULT ROM VALUES
(HEXIDECIMAL)
USB2512B/12Bi USB2513B/13Bi USB2514B/14Bi
00h Vendor ID LSB 24
01h Vendor ID MSB 04
02h Product ID LSB 12 13 14
03h Product ID MSB 25
04h Device ID LSB B3
05h Device ID MSB 0B
06h Configuration Data Byte 1 9B
07h Configuration Data Byte 2 20
08h Configuration Data Byte 3 02
09h Non-Removable Devices 00
0Ah Port Disable (Self) 00
0Bh Port Disable (Bus) 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 00
13h Manufacturer String Length 00
14h Product String Length 00
15h Serial String Length 00
16h-53h Manufacturer String 00