USB4640I datasheet(44/64 Pages) SMSC

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High Speed Inter-Chip (HSIC) USB 2.0 Hub and Flash Media Controller

Datasheet

Revision 1.0 (06-09-09)

SMSC USB4640/USB4640i

DATASHEET

8.4.4.11

E8h: Port Disable For Self-Powered Operation

8.4.4.12

E9h: Port Disable For Bus-Powered Operation

8.4.4.13

EAh: Max Power For Self-Powered Operation

BIT

BYTE NAME

DESCRIPTION

7:0

PORT_DIS_SP

Disables 1 or more ports.

‘0’ = Port is available

‘1’ = Port is disabled

During self-powered operation

this register selects the ports which will be

permanently disabled. The ports are unavailable to be enabled or

enumerated by a host controller. The ports can be disabled in any order

since 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= Controls physical port 3

Bit 2= Controls physical port 2

Bit 1= Controls physical port 1

Bit 0= Reserved

BIT

BYTE NAME

DESCRIPTION

7:0

PORT_DIS_BP

Disables 1 or more ports.

‘0’ = Port is available

‘1’ = Port is disabled

During self-powered operation

, this register selects the ports which will be

permanently disabled. The ports are unavailable 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.

When using the internal default option, the PRT_DIS[1:0] pins will disable the

appropriate ports.

Bit 7= Reserved

Bit 6= Reserved

Bit 5= Reserved

Bit 4= Reserved

Bit 3= Controls physical port 3

Bit 2= Controls physical port 2

Bit 1= Controls physical port 1

Bit 0 is Reserved

BIT

BYTE NAME

DESCRIPTION

7:0

MAX_PWR_SP

Value in 2 mA increments that the hub consumes when operating as a self-

powered hub. This value includes the hub silicon along with the combined

power consumption 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 0 mA in its descriptors.

Note:

The USB 2.0 Specification does not permit this value to exceed 100

mA.

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