USB3803 datasheet(28/99 Pages) MICROCHIP

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USB3803

DS00001691B-page 28

 2014-2015 Microchip Technology Inc.

5.3.15

HCMCS

Default = 0x02h Corresponds to 2mA.

5.3.16

HCMCB

Default = 0x64h- Corresponds to 100mA.

5.3.17

5.3.18

Default = 0x04h - Corresponds to US English code 0x0409h

Bit Number

Bit Name

Description

7:0

HC_MAX_C_SP Hub Controller Max Current Self-Powered: Value in 1mA increments that the

Hub consumes from an upstream port (VBUS) when operating as a self- pow-

ered 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.

Example: A value of 8mA would be written to this register as 0x08h

Note:

The USB 2.0 Specification does not permit this value to exceed

100mA

Bit Number

Bit Name

Description

7:0

HC_MAX_C_BP Hub Controller Max Current Bus-Powered: Value in 1mA increments that the

Hub consumes from an upstream port (VBUS) when operating as a bus- pow-

ered hub. This value will include the hub silicon along with the combined power

consumption (from VBUS) of all associated circuitry on the board. This value will

NOT include the power consumption of a permanently attached peripheral if the

hub is configured as a compound device.

Example: A value of 8mA would be written to this register as 0x08h

Bit Number

Bit Name

Description

7:0

POWER_ON_-

TIME

Power On Time: The length of time that is 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. Setting affects only the hub descriptor field

“PwrOn2PwrGood” see Section 7.6, "Class-Specific Hub Descriptor," on

page 66.

Note:

This register represents time from when a host sends a SetPortFeature(PORT_POWER) request to the

time power is supplied through an external switch to a downstream port. It should be set to 0 if no power

switch is used- for instance within a compound device.

Bit Number

Bit Name

Description

7:0

LANG_ID_H

USB LANGUAGE ID (Upper 8 bits of a 16 bit ID field)

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