LAN9514 datasheet(23/54 Pages) MICROCHIP

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DS00002306A-page 23

LAN9514/LAN9514I

2Ah

Port Disable (Self) Register (PDS)

Disables 1 or more ports.

0 = Port is available

1 = Port is disabled

During Self-Powered operation, 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 = 1; Port 5 disabled

Bit 4 = 1; Port 4 disabled

Bit 3 = 1; Port 3 disabled

Bit 2 = 1; Port 2 disabled

Bit 1 = 1; Port 1 disabled

Bit 0 is RESERVED, always = 0b

00h

2Bh

Port Disable (Bus) Register (PDB)

Disables 1 or more ports.

0 = Port is available

1 = Port is disabled

During Bus-Powered operation, 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 = 1; Port 5 disabled

Bit 4 = 1; Port 4 disabled

Bit 3 = 1; Port 3 disabled

Bit 2 = 1; Port 2 disabled

Bit 1 = 1; Port 1 disabled

Bit 0 is RESERVED, always = 0b

00h

2Ch

Max Power (Self) Register (MAXPS)

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, 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.

01h

2Dh

Max Power (Bus) Register (MAXPB)

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, and the embedded

peripheral reports 0 mA in its descriptors.

00h

TABLE 3-3:

HUB CONFIGURATION (CONTINUED)

EEPROM

Offset

Description

Default

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