USB 2.0 Hi-Speed 2-Port Hub Controller
Datasheet
Table 7.2 Upstream Battery Charging Detection Control Register
UPSTREAM BATTERY CHARGING REGISTER
UP_BC_DET
(0x30E2 - RESET= 0x02)
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
4
CHGDET_COMPLETE
R
Indicates Charger Detection has been run and is completed. This bit is
negated when START_CHG_DET is asserted high.
3
Reserved
R/W
R
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
0
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
SMSC USB2532
33
Revision 1.0 (06-17-13)
DATASHEET
SMSC [ SMSC CORPORATION ]
