AXP209 datasheet(34/45 Pages) ETC2

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AXP209

Enhanced single Cell Li-Battery and Power System Management IC

10.12 REG 31H: VOFF Shutdown voltage setting

The default value: X3H

Bit

Description

R / W

Default

value

7-4

Reserved, can not be changed

Sleep Mode PEK or GPIO edge wakeup enable settings:

0: Disable

1: Enable

This bit will be automatically cleared to 0 after writing, so “1 ”should be

rewritten whenever entering Sleep mode.

2-0

VOFF Setting

VOFF= [2.6+ (Bit2-0) * 0.1] V

011

Default: 2.9V

10.13 REG 32H:Shutdown settings, battery detection, and CHGLED Pin control

The default value: 46H

Bit

Description

R / W

Default

value

Shutdown Control

This bit is write 1 will shutdown the AXP209 outputs

Battery monitoring function setting bit: 0:Shut down; 1:Turn on

5-4

CHGLED Pin function setting

00: Hi

01: 25% 1Hz Flashing

10: 25% 4Hz Flashing

11: Output Low

CHGLED Pin control settings

0: Controlled by charging

1: Controlled by REG 32H [5: 4]

Output off timing sequence

control

0: Shutdown simultaneously

1: Shutdown in reverse sequence to

startup

1-0

Shutdown delay time after N_OE

changes from low to high

00: 128mS;

01: 1S;

10: 2S;

11: 3S

10.14 REG 33H:Charge Control 1

The default value: CXH

Bit

Description

R /

Default

value

Charging function enable control bit

0:Disable, 1:Enable

6-5

Charging target voltage

setting

00: 4.1V; 01: 4.15V; 10: 4.2V; 11: 4.36V

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