AXP209 datasheet(31/45 Pages) ETC2

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AXP209

Enhanced single Cell Li-Battery and Power System Management IC

10.1 REG 00H:Input power status

Bit

Description

R / W

ACIN presence indication

0: ACIN Does not exist;1: ACIN Exist

Instructions ACIN Is available

VBUS presence indication

0: VBUS Does not exist;1: VBUS Exist

Indicates if VBUS is useable

Indicating whether the VBUS voltage is above VHOLD before used.

Indicates that the battery current direction

0:Battery discharging; 1:The battery is charging

Indicating whether ACIN and VBUS input short circuit on PCB

Indicating whether the boot source is ACIN or VBUS

0: Boot source isn’t ACIN/VBUS； 1: Boot source is ACIN/VBUS.

10.2 REG 01H:Power mode and charge status indication

Bit

Description

R / W

Indicates AXP209 over-temperature

0:Not too hot; 1:Over Temperature

Charging indicator

0:Not charging or charging has been

completed; 1:Charging

Battery connected indicator

0:No battery is connected to the AXP209; 1:The battery is connected to

the AXP209

Reservations can not be changed

Indicate whether the battery charger entered into activation mode

0:Did not enter the cell activation mode; 1:Has entered the cell activation mode

Indicates the charging current is less than the expected current

0:The actual charge current equal to the desired current; 1:The actual charge current is

less than the desired current

1-0

Reserved, can not be changed

10.3 REG 02H: USB OTG VBUS Status Indication

Bit

Description

R / W

7-3

Reserved, can not be changed

Indicating whether VBUS is valid or not，1 means “valid”

Indicating Session End status，1 means “valid”

Confidential

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