USB3803 datasheet(27/99 Pages) MICROCHIP

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 2014-2015 Microchip Technology Inc.

DS00001691B-page 27

USB3803

5.3.12

Default = 0x00h

5.3.13

Default = 0x01h

5.3.14

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, when PRTMAP_EN = ‘0’, this selects the ports

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

merated by a Host Controller. The ports can be disabled in any order, the inter-

nal 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 (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 descrip-

tors.

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

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 (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 descrip-

tors.

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

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