USB2512 SMSC Corporation, USB2512 Datasheet - Page 20

• Manufacturer Part Number: USB2512
• Description: USB 2.0 High-Speed 2-Port Hub Controller
• Manufacturer: SMSC Corporation

Revision 1.92 (11-28-07)
4.2.1.14
4.2.1.15
4.2.1.16
NUMBER
NUMBER
NUMBER
BIT
BIT
BIT
7:0
7:0
7:0
7:0
Register 0Dh: Max Power For Bus Powered Operation
Register 0Eh: Hub Controller Max Current For Self Powered Operation
Register 0Fh: Hub Controller Max Current For Bus Powered Operation
HC_MAX_C_SP
HC_MAX_C_BP
MAX_PWR_SP
MAX_PWR_BP
BIT NAME
BIT NAME
BIT NAME
Hub Controller Max Current Self-Powered: Value in 2mA increments that the
Hub Controller Max Current Bus-Powered: Value in 2mA increments that the
Max Power Self_Powered: Value in 2mA increments that the Hub consumes
from an upstream port (VBUS) when operating as a self-powered hub. This
value includes the hub silicon along with the combined power consumption
(from VBUS) 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
0mA in its descriptors.
Note:
Max Power Bus_Powered: Value in 2mA increments that the Hub consumes
from an upstream port (VBUS) when operating as a bus-powered hub. This
value includes the hub silicon along with the combined power consumption
(from VBUS) 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
0mA in its descriptors.
Hub consumes from an upstream port (VBUS) when operating as a self-
powered hub. This value includes the hub silicon along with the combined
power consumption (from VBUS) 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:
A value of 50 (decimal) indicates 100mA, which is the default value.
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 100mA, which is the default value.
The USB 2.0 Specification does not permit this value to exceed
100mA
The USB 2.0 Specification does not permit this value to exceed
100mA
DATASHEET
20
DESCRIPTION
DESCRIPTION
DESCRIPTION
USB 2.0 High-Speed 2-Port Hub Controller
SMSC USB2512
Datasheet