USB2533 datasheet(34/61 Pages) SMSC

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USB 2.0 Hi-Speed 3-Port Hub Controller

Datasheet

Revision 1.0 (06-17-13)

SMSC USB2533

DATASHEET

Table 7.2 Upstream Battery Charging Detection Control Register

UP_BC_DET

(0x30E2 - RESET= 0x02)

UPSTREAM BATTERY CHARGING REGISTER

BIT

NAME

R/W

DESCRIPTION

7:5

CHARGER_TYPE

R/W

Read Only.

This field indicates the result of the automatic charger detection. Values

reported depend on EnhancedChrgDet bit setting in Upstream Battery

Charger Mode Register.

If EnhancedChrgDet = 1

000 = Charger Detection is not complete.

001 = DCP - Dedicated Charger Port

010 = CDP – Charging Downstream Port

011 = SDP – Standard Downstream Port

100 = Apple Low Current Charger

101 = Apple High Current Charger

110 = Apple Super High Current Charger

111 = Charger Detection Disabled

If EnhancedChrgDet = 0

000 = Charger Detection is not complete.

001 = DCP/CDP – Dedicated Charger or Charging Downstream Port

010 = Reserved

011 = SDP – Standard Downstream Port

100 = Apple Low Current Charger

101 = Apple High Current Charger

110 = Apple Super High Current Charger

111 = Charger Detection Disabled

CHGDET_COMPLETE

Indicates Charger Detection has been run and is completed. This bit is

negated when START_CHG_DET is asserted high.

Reserved

R/W

Reserved for debugging

2:1

CHG_DET[1:0]

Indicates encoded status of what chargers or status has been detected

according to the settings in the Charge Detect Mask Register. It can be

used to determine what current can be drawn from the upstream USB

port.

00 = No selected Chargers or Status identified

01 = 100ma (VBUS detect without enumeration)

10 = 500ma (Device enumerated, Set Config seen)

11 = 1000+ma (Charger detected)

The actual current amount for the charger will be system dependent

START_CHG_DET

R/W

Manually Initiates a USB battery charger detection sequence at the time

of assertion. This bit must not be set while hub is in operation. This bit

is cleared automatically when the manual battery charger detection

sequence is completed.

0 = Write: No Effect / Read: Battery Charger Detection Sequence

Completed or not run.

1 = Write: Start Battery Charger Detection / Read: Battery Charger

Detection Sequence is running

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