USB3803 datasheet(25/99 Pages) MICROCHIP

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 2014-2015 Microchip Technology Inc.

DS00001691B-page 25

USB3803

5.3.8

5.3.9

2:1

CUR-

RENT_SNS

Over Current Sense: Selects current sensing on a port-by-port basis, all ports

ganged, or none (only for bus-powered hubs) The ability to support current sens-

ing on a port or ganged basis is hardware implementation dependent.

00 = Ganged sensing (all ports together).

01 = Individual port-by-port.

1x = Over current sensing not supported. (must only be used with Bus- Powered

configurations!)

PORT_PWR

Port Power Switching: Enables power switching on all ports simultaneously

(ganged), or port power is individually switched on and off on a port- by-port

basis (individual). The ability to support power enabling on a port or ganged

basis is hardware implementation dependent.

0 = Ganged switching (all ports together)

1 = Individual port-by-port switching.

Bit Number

Bit Name

Description

7:4

Reserved

COMPOUND

Compound Device: Allows the customer to indicate that the Hub is part of a com-

pound (see the USB Specification for definition) device. The applicable port(s)

must also be defined as having a “Non-Removable Device”.

0 = No.

1 = Yes, Hub is part of a compound device.

2:0

Reserved

Bit Number

Bit Name

Description

7:4

Reserved

PRTMAP_EN

Port Re-Mapping enable: Selects the method used by the hub to assign port

numbers and disable ports

‘0’ = Standard Mode. The following registers are used to define which ports are

enabled, and the ports are mapped as Port “n” on the hub is reported as Port ‘n’

to the host, unless one of the ports is disabled, then the higher numbered ports

are remapped in order to report contiguous port numbers to the host.

Section 5.3.11 Register 0A

Section 5.3.12 Register 0B

‘1’ = Port Re-Map mode. The mode enables remapping via the registers defined

below.

Section 5.3.43 Register FB

Section 5.3.44 Register FC

Bit Number

Bit Name

Description

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