USB2513 datasheet(25/57 Pages) MICROCHIP

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 2010 - 2015 Microchip Technology Inc.

DS00001692C-page 25

USB251xB/xBi

5.1.12

5.1.13

5.1.14

Bit Number

Bit Name

Description

7:0

PORT_DIS_BP

Port Disable Bus-Powered: disables one or more ports.

= port is available

= port is disabled

Bit 7 : rsvd

Bit 6 : rsvd

Bit 5 : rsvd

Bit 4 : controls port 4

Bit 3 : controls port 3

Bit 2 : controls port 2

Bit 1 : controls port 1

Bit 0 : rsvd

During self-powered operation when mapping mode is disabled (PRTMAP_EN

= 0), this selects the ports which will be permanently disabled.These ports are

then unavailable and cannot be enabled or enumerated by a host controller.

The ports can be disabled in any order, where the internal logic will

automatically report the correct number of enabled ports to the USB host. The

active ports will be reordered in order to ensure proper function.

When using the internal default option, the PRT_DIS_P[x:1] and

PRT_DIS_M[x:1] pins disable the appropriate ports.

Bit Number

Bit Name

Description

7:0

MAX_PWR_SP

Max Power Self-Powered: the value in 2 mA 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. The embedded peripheral

reports 0 mA in its descriptors.

Note:

The USB 2.0 Specification does not permit this value to exceed

100 mA

Bit Number

Bit Name

Description

7:0

MAX_PWR_BP

Max Power Bus-Powered: the value in 2 mA 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. The embedded peripheral

reports 0 mA in its descriptors.

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