USB 2.0 Hi-Speed Hub Controller
Datasheet
SMSC USB251x
43
Revision 1.0 (3-11-09)
DATASHEET
8.2.1.16
Register 0Fh: Hub Controller Max Current For Bus-Powered Operation
8.2.1.17
Register 10h: Power-On Time
8.2.1.18
Register 11h: Language ID High
8.2.1.19
Register 12h: Language ID Low
8.2.1.20
Register 13h: Manufacturer String Length
8.2.1.21
Register 14h: Product String Length
BIT
NUMBER
BIT NAME
DESCRIPTION
7:0
HC_MAX_C_BP
Hub Controller Max Current Bus-Powered: 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.
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 power-on sequence begins on a port until power is
adequate on that port.
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
When supported, the maximum string length is 31 characters.
BIT
NUMBER
BIT NAME
DESCRIPTION
7:0
PRD_STR_LEN
Product String Length
When supported, the maximum string length is 31 characters.
