Datasheet

USB 2.0 Hi-Speed Hub Controller
Datasheet
SMSC USB251xB/xBi 35 Revision 2.2 (02-17-12)
DATASHEET
5.1.16 Register 0Fh: Hub Controller Max Current For Bus-Powered Operation
5.1.17 Register 10h: Power-On Time
5.1.18 Register 11h: Language ID High
5.1.19 Register 12h: Language ID Low
5.1.20 Register 13h: Manufacturer String Length
BIT
NUMBER BIT NAME DESCRIPTION
7:0 HC_MAX_C_BP Hub Controller Max Current Bus-Powered: the value in 2 mA increments that
the hub consumes from an upstream port (VBUS) when operating as a bus-
powered hub. This value will include the hub silicon along with the combined
power consumption (from VBUS) of all associated circuitry on the board.
Note: This value will not include the power consumption of a permanently
attached peripheral if the hub is configured as a compound device.
A value of 50 (decimal) would indicate 100 mA, which is the default value.
BIT
NUMBER BIT NAME DESCRIPTION
7:0 POWER_ON_TIME Power-On Time: the length of time that it takes (in 2 ms intervals) from the
time the host initiated the power-on sequence on a port until the port has
adequate power.
BIT
NUMBER BIT NAME DESCRIPTION
7:0 LANG_ID_H USB Language ID: upper 8 bits of a 16-bit ID field
BIT
NUMBER BIT NAME DESCRIPTION
7:0 LANG_ID_L USB Language ID: lower 8 bits of a 16-bit ID field
BIT
NUMBER BIT NAME DESCRIPTION
7:0 MFR_STR_LEN Manufacturer String Length: with a maximum string length of 31 characters
(when supported).