AXP223 datasheet(17/56 Pages) ETC2

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AXP223

PMIC Optimized For Multi-Core High-Performance System

AXP223 Datasheet Revision 1.1

PAGE

Control and Operating

Once AXP223is powered on,SCK/SDA pin of P2WI/RSB will be pulled up to IO Power and then Host(system processor) can

adjust and monitor AXP223，

Remarks: “External Power” below includes ACIN and VBUS input.

9.1. Power On/Off & Reset

9.1.1.

Power Enable Key (PEK)

The Power Enable/ Sleep/Wakeup Key can be connected between PWRON pin and GND of AXP223.AXP223 can automatically

identify the “Long-press” and “Short-press” and then correspond respectively.

9.1.2.

Power On

Power on Source

■

ACIN and VBUS

■

PEK

■

IRQ low level

press PEK can power on AXP223 (press time over ONLEVEL),In application, Host Alarm output signal can be connected to IRQ

Whenever there is a valid Alarm signal ((Low Level)), AXP223 can be powered on..

After power on, DC-DC and LDO will be soft booted in preset timing sequence.

9.1.3.

Power Off

When you push-and-hold PEK longer than IRQLEVEL, HOST can write “1” into“REG32H [7]” to inform AXP223 to shutdown,

which can disable all power output except VCC-RTC..

System power-off is initiated whenever the following conditions occur :

■

input voltage is too low( Low-Power Protection)；

■

Power output voltage is too low due to overload( Overload Protection)；

■

Input voltage is too high( Overvoltage Protection)( See more details in chapter “ Intelligent Power Select”；

■

Push PEK longer more than OFFLEVEL( Default 6S), and system will cut off all power output except VCC-RTC；

With the automatic protection mechanism, AXP223 can protect whole system by preventing

Components from irriversable damage due to system abnormality.

AXP223 Datasheet(PDF) 17 Page - List of Unclassifed Manufacturers