USB2504-JD Standard Microsystems Corp., USB2504-JD Datasheet - Page 31

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

Integrated USB2.0 Compatible 4-Port Hub
Datasheet
SMSC USB2504
5.3.9.11
5.3.9.12
5.3.9.13
NUMBER
NUMBER
NUMBER
BIT
BIT
BIT
7:0
7:0
7:0
Register 0Ah: Port Disable For Self Powered Operation (Reset = 0x00)
Register 0Bh: Port Disable For Bus Powered Operation (Reset = 0x00)
Register 0Ch: Max Power For Self Powered Operation (Reset = 0x00)
PORT_DIS_SP
PORT_DIS_BP
MAX_PWR_SP
BIT NAME
BIT NAME
BIT NAME
Port Disable Self-Powered: Disables 1 or more contiguous ports. ‘0’ = port
is available, ‘1’ = port is disabled.
Bit 7= Reserved
Bit 6= Reserved
Bit 5= Reserved
Bit 4= 1; Port 4 is disabled.
Bit 3= 1; Port 3 is disabled.
Bit 2= 1; Port 2 is disabled.
Bit 1= 1; Port 1 is disabled.
Bit 0 is Reserved, always = ‘0’
Port Disable Bus-Powered: Disables 1 or more contiguous ports. ‘0’ = port
is available, ‘1’ = port is disabled.
Bit 7= Reserved
Bit 6= Reserved
Bit 5= Reserved
Bit 4= 1; Port 4 is disabled.
Bit 3= 1; Port 3 is disabled.
Bit 2= 1; Port 2 is disabled.
Bit 1= 1; Port 1 is disabled.
Bit 0 is Reserved, always = ‘0’
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: The USB2.0 Specification does not permit this value to exceed 100mA
A value of 50 (decimal) indicates 100mA.
25
DESCRIPTION
DESCRIPTION
DESCRIPTION
Revision 1.3 (06-28-04)