USB2507 查看數據表（PDF） - Microchip Technology
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USB2507 Datasheet PDF : 42 Pages
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USB2507
5.2.3.7 EEPROM Offset 9(h) - Port Disable For Self Powered Operation
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= 1; Port 7 is disabled.
Bit 6= 1; Port 6 is disabled.
Bit 5= 1; Port 5 is disabled.
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’
5.2.3.8 EEPROM Offset A(h) - Port Disable For Bus Powered Operation
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= 1; Port 7 is disabled.
Bit 6= 1; Port 6 is disabled.
Bit 5= 1; Port 5 is disabled.
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’
5.2.3.9 EEPROM Offset B(h) - Max Power For Self Powered Operation
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.
5.2.3.10 EEPROM Offset C(h) - Max Power For Bus Powered Operation
Bit Number
7:0
Bit Name
MAX_PWR_BP
Description
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.
A value of 50 (decimal) indicates 100mA.
DS000002251A-page 18
2007 - 2016 Microchip Technology Inc.
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