USB2504-JD Standard Microsystems Corp., USB2504-JD Datasheet - Page 32

• Manufacturer Part Number: USB2504-JD
• Description: Interface, Integrated USB2.0 Compatible 4-Port Hub
• Manufacturer: Standard Microsystems Corp.

Revision 1.3 (06-28-04)
5.3.9.14
0x00)
5.3.9.15
5.3.9.16
5.3.9.17
5.3.9.18
NUMBER
NUMBER
NUMBER
NUMBER
BIT
BIT
BIT
BIT
7:0
7:0
7:0
7:0
Register 0Dh: Max Power For Bus Powered Operation (Reset =
Register 0Eh: Hub Controller Max Current For Self Powered Operation (Reset = 0x00)
Register 0Fh: Hub Controller Max Current For Bus Powered Operation (Reset = 0x00)
Register 10h: Power-On Time (Reset = 0x00)
Undefined Registers
The registers shown in
return 00h. Writes to undefined registers have no effect and do not return an error.
POWER_ON_TIME
HC_MAX_C_SP
HC_MAX_C_BP
MAX_PWR_BP
BIT NAME
BIT NAME
BIT NAME
BIT NAME
Table 5.4
Hub Controller Max Current Self-Powered: Value in 2mA increments that the
Hub Controller Max Current Self-Powered: Value in 2mA increments that the
Power On Time: The length of time that is takes (in 2 ms intervals) from 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.
A value of 50 (decimal) indicates 100mA.
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: The USB2.0 Specification does not permit this value to exceed 100mA
A value of 50 (decimal) indicates 100mA, which is the default value.
Hub consumes from an upstream port (VBUS) when operating as a self-
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.
time the host initiated power-on sequence begins on a port until power is
good on that port.
are the defined registers in the Hub. Reads to undefined registers
26
DESCRIPTION
DESCRIPTION
DESCRIPTION
DESCRIPTION
Integrated USB2.0 Compatible 4-Port Hub
SMSC USB2504
Datasheet