LAN9514 datasheet(24/54 Pages) MICROCHIP

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LAN9514/LAN9514I

DS00002306A-page 24

 2009-2016 Microchip Technology Inc.

2Eh

Hub Controller Max Current (Self) Register (HCMCS)

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 does NOT include the power consumption of a permanently

attached peripheral if the hub is configured as a compound device.

Note:

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

01h

2Fh

Hub Controller Max Current (Bus) Register (HCMCB)

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 does NOT include the power consumption of a permanently

attached peripheral if the hub is configured as a compound device.

00h

30h

Power-on Time Register (PWRT)

The length of time that it takes (in 2 mS intervals) from the time the host initiated

power-on sequence begins on a port until power is good on that port. System

software uses this value to determine how long to wait before accessing a powered-

on port.

32h

31h

Boost_Up Register (BOOSTUP)

Refer to Table 3-7, “Boost_Up Register (BOOSTUP) Format,” on page 30 for details.

00h

32h

Boost_5 Register (BOOST5)

Refer to Table 3-8, “Boost_3:2 Register (BOOST32) Format,” on page 30 for details.

00h

33h

Boost_4:2 Register (BOOST42)

Refer to Table 3-9, “Boost_4:2 Register (BOOST42) Format,” on page 31 for details.

00h

34h

RESERVED

00h

35h

Port Swap Register (PRTSP)

Swaps the Upstream and Downstream USB DP and DM pins for ease of board

routing to devices and connectors.

0 = USB D+ functionality is associated with the DP pin and D- functionality is

associated with the DM pin.

1 = USB D+ functionality is associated with the DM pin and D- functionality is

associated with the DP pin.

Bit 7 = RESERVED

Bit 6 = RESERVED

Bit 5 = 1; Port 5 DP/DM is swapped

Bit 4 = 1; Port 4 DP/DM is swapped

Bit 3 = 1; Port 3 DP/DM is swapped

Bit 2 = 1; Port 2 DP/DM is swapped

Bit 1 = RESERVED

Bit 0 = 1; Upstream Port DP/DM is swapped

00h

TABLE 3-3:

HUB CONFIGURATION (CONTINUED)

EEPROM

Offset

Description

Default

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