USB3503 datasheet(33/82 Pages) SMSC

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USB 2.0 HSIC High-Speed Hub Controller Optimized for Portable Applications

Datasheet

SMSC USB3503A

Revision 1.1 (02-07-13)

DATASHEET

5.3.15

- HCMCS

Default = 0x02h Corresponds to 2mA.

5.3.16

- HCMCB

Default = 0x64h- Corresponds to 100mA.

5.3.17

Default = 0x00h - Corresponds to 0ms. Required for a hub with no power switches

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.

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 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.

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 when operating as a bus- powered hub.

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

BIT NUMBER

BIT NAME

DESCRIPTION

7:0

POWER_ON_TI

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 7.4, "Class-Specific Hub Descriptor," on

page 56.

BIT NUMBER

BIT NAME

DESCRIPTION

7:0

LANG_ID_H

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

USB3503 Datasheet(PDF) 33 Page - SMSC Corporation

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