USB2502-AEZG View Datasheet(PDF) - SMSC -> Microchip
Part Name
Description
MFG CO.
'USB2502-AEZG' PDF : 44 Pages View PDF
5.3.9.10 Register 09h: Non-Removable Device (Reset = 0x00)
2-Port USB 2.0 Hub Controller
Datasheet
BIT
NUMBER
7:0
BIT NAME
NR_DEVICE
DESCRIPTION
Non-Removable Device: Indicates which port(s) include non-removable devic-
es. ‘0’ = port is removable, ‘1’ = port is non-removable.
Bit 7:3: Reserved, always = ‘0’
Bit 2= 1; Port 2 non-removable.
Bit 1= 1; Port 1 non removable.
Bit 0 is Reserved, always = ‘0’.
5.3.9.11 Register 0Ah: Port Disable For Self Powered Operation (Reset = 0x00)
BIT
NUMBER
7:0
BIT NAME
PORT_DIS_SP
DESCRIPTION
Port Disable Self-Powered: Disables 1 or more contiguous ports. ‘0’ = port
is available, ‘1’ = port is disabled.
Bit 7:3= 0; ReservedBit 2= 1; Port 2 is disabled.
Bit 1= 1; Port 1 is disabled.
Bit 0 is Reserved, always = ‘0’
5.3.9.12 Register 0Bh: Port Disable For Bus Powered Operation (Reset = 0x00)
BIT
NUMBER
7:0
BIT NAME
PORT_DIS_BP
DESCRIPTION
Port Disable Bus-Powered: Disables 1 or more contiguous ports. ‘0’ = port
is available, ‘1’ = port is disabled.
Bit 7:3= 0; ReservedBit 2= 1; Port 2 is disabled.
Bit 1= 1; Port 1 is disabled.
Bit 0 is Reserved, always = ‘0’
5.3.9.13 Register 0Ch: Max Power For Self Powered Operation (Reset = 0x00)
BIT
NUMBER
7:0
BIT NAME
MAX_PWR_SP
DESCRIPTION
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 USB 2.0 Specification does not permit this value to exceed
100mA
A value of 50 (decimal) indicates 100mA.
Revision 2.3 (08-27-07)
30
DATASHEET
SMSC USB2502
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