USB3503 datasheet(25/73 Pages) MICROCHIP

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DS00001584B-page 25

USB3503

5.3.12

Default = 0x00h

5.3.13

Default = 0x01h

5.3.14

Default = 0xFAh- Corresponds to 500mA.

Bit Number

Bit Name

Description

7:0

PORT_DIS_BP Port Disable, Bus-Powered: Disables 1 or more ports.

‘0’ = port is available

‘1’ = port is disabled.

During Bus-Powered operation and PRTMAP_EN = ‘0’, this selects the ports

which will be permanently disabled, and are not available to be enabled or

enumerated by a Host Controller. The ports can be disabled in any order, the

internal logic will automatically report the correct number of enabled ports to the

USB Host, and will reorder the active ports in order to ensure proper function.

Bit 7= Reserved

Bit 6= Reserved

Bit 5= Reserved

Bit 4= Reserved

Bit 3= Port 3 Disable.

Bit 2= Port 2 Disable.

Bit 1= Port 1 Disable.

Bit 0= Reserved

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 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.

Example: A value of 8mA would be written to this register as 0x04h

Note: The USB 2.0 Specification does not permit this value to exceed 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 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.

Example: A value of 8mA would be written to this register as 0x04h

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