STPMIC1CPQR datasheet(52/140 Pages) STMICROELECTRONICS

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VINLOW_Rise and VINLOW_Fall detection generate respectively VINLOW_RI and VINLOW_FA interrupt in

INT_PENDING_R4, allowing application processor to take relevant actions. They can be unmasked

independently.

Refer to Section 6.5 Interrupt registers.

5.4.2

Turn-ON conditions

Turn-ON means the STPMIC1 reaches POWER_ON state from NO_SUPPLY or OFF-state.

The STPMIC1 is turned ON on four conditions.

Three conditions are triggered by an external stimulation:

•

PONKEYn pin detection

•

VBUS detection (voltage rising on VBUSOTG or SWOUT pins)

•

WAKEUP pin detection

Last condition is triggered by AUTO turn-ON feature (see below).

When in POWER_ON, the last turn-ON condition is stored and can be read in Section 6.2.1 Turn-ON status

AUTO turn-ON

AUTO turn-ON feature allows the STPMIC1 to be turned ON automatically as soon as VIN rises above a valid

voltage. See Section 5.4.1 VIN conditions and monitoring .

After VIN rises above VINOK_Rise, the STPMIC1 goes to PRELOAD_NVM state and load AUTO_TURN_ON bit

from NVM. If AUTO_TURN_ON is set, the STPMIC1 goes directly into CHECK&LOAD then goes to POWER_UP

and to POWER_ON.

AUTO turn-ON event is triggered only by NO_SUPPLY state transition.

AUTO turn-ON is enabled by default in NVM and can be disabled by resetting AUTO_TURN_ON bit in

Table 65. NVM_MAIN_CTRL_SHR register.

Details of the sequence are described in the Figure 56. Auto turn-on condition sequence.

Figure 56. Auto turn-on condition sequence

POWER_UP

CHECK&

LOAD

POWER_ON

NO_SUPPLY

PRE

LOAD

RSTn

AUTO_TURN_ON=1

VIN_POR_Rise

VINOK_Rise

>7ms

PONKEY/VBUS/WAKEUP detection

Those 3 conditions depend on stimulation on the specific STPMIC1 pins. The source and electrical characteristics

of each condition are described in Table 11. Turn-on description.

STPMIC1

Feature description

DS12792 - Rev 7

page 52/140

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