STPMIC1 datasheet(47/140 Pages) STMICROELECTRONICS

47 / 140 page

Functional description

5.1

Overview

The STPMIC1 integrates advanced low power features controlled by the application processor through I²C, 4

digital control pins (PONKEYn, WAKEUP, PWRCTRL and RSTn) and one interrupt output line (INTn).

The main parameter settings can be programmed in a non-volatile memory (NVM) as default values at start-up

time.

See Section 5.5.2 Non-volatile memory (NVM)

The STPMIC1 offers 2 independent POWER_ON modes called MAIN and ALTERNATE. Switching between these

modes is driven by the application processor through PWRCTRL pin.

This allow a flexible configuration and fast transition between two different power strategies at application level,

typically RUN and STANDBY (LowPower).

Other features are provided to fulfill high-end application processors and advanced operating system needs:

•

Multiple turn-on/turn-off conditions

•

mask_default and restart_request options

•

Overcurrent and overvoltage protection

•

Thermal protection

•

Watchdog

•

Interrupt controller

5.2

Functional state machine

The behavior of the STPMIC1 circuit is controlled by a state machine described in this section.

STPMIC1

Functional description

DS12792 - Rev 7

page 47/140

STPMIC1 数据表(PDF) 47 Page - STMicroelectronics