SMSC USB464, USB4640i EBh: Max Power For Bus-PoweredOperation, 8.4.4.15ECh: Hub Controller Max Current For Self-PoweredOperation, 8.4.4.17EEh: Power-OnTime

High Speed Inter-Chip USB 2.0 Hub and Flash Media Controller

Datasheet
8.4.4.14	EBh: Max Power For Bus-Powered Operation
BIT	BYTE NAME	DESCRIPTION
7:0	MAX_PWR_BP	Value in 2 mA increments that the hub consumes when operating as a bus-
		powered hub. This value includes the hub silicon along with the combined
		power consumption of all associated circuitry on the board. This value also
		includes the power consumption of a permanently attached peripheral if the
		hub is configured as a compound device, and the embedded peripheral
		reports 0 mA in its descriptors.

8.4.4.15ECh: Hub Controller Max Current For Self-Powered Operation

BIT	BYTE NAME	DESCRIPTION
7:0	HC_MAX_C_SP	Value in 2 mA increments that the hub consumes when operating as a self-
		powered hub. This value includes the hub silicon along with the combined
		power consumption of all associated circuitry on the board. This value does
		NOT include the power consumption of a permanently attached peripheral if
		the hub is configured as a compound device.
		Note: The USB 2.0 Specification does not permit this value to exceed 100
		mA.
		A value of 50 (decimal) indicates 100 mA, which is the default value.

8.4.4.16EDh: Hub Controller Max Current For Bus-Powered Operation

BIT	BYTE NAME	DESCRIPTION
7:0	HC_MAX_C_BP	Value in 2 mA increments that the hub consumes when operating as a bus-
		powered hub. This value will include the hub silicon along with the combined
		power consumption 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.

8.4.4.17EEh: Power-On Time

BIT	BYTE NAME	DESCRIPTION
7:0	PWR_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. If the host requests the power-on time, the system software uses this
		value to determine how long to wait before accessing a powered-on port.

SMSC USB4640/USB4640i 45 Revision 1.0 (06-01-09)

DATASHEET