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USB2504 数据表(PDF) 18 Page - Microchip Technology

部件名 USB2504
功能描述  Integrated USB 2.0 Compatible 4-Port Hub
PDF  42 Pages
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制造商  MICROCHIP [Microchip Technology]
网页  http://www.microchip.com
标志 MICROCHIP - Microchip Technology

USB2504 数据表(HTML) 18 Page - Microchip Technology

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USB2504/USB2504A
DS000002250A-page 18
 2007 - 2016 Microchip Technology Inc.
5.2.3.7
EEPROM Offset 9(h) - Port Disable For Self Powered Operation
5.2.3.8
EEPROM Offset A(h) - Port Disable For Bus Powered Operation
5.2.3.9
EEPROM Offset B(h) - Max Power For Self Powered Operation
5.2.3.10
EEPROM Offset C(h) - Max Power For Bus Powered Operation
Bit Number
Bit Name
Description
7:0
PORT_DIS_SP
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’
Bit Number
Bit Name
Description
7:0
PORT_DIS_BP
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’
Bit Number
Bit Name
Description
7:0
MAX_PWR_SP
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.
Bit Number
Bit Name
Description
7:0
MAX_PWR_BP
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.



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