STFPC320 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

STFPC320

Front panel controller/driver with standby power management and real-time clock

STMicroelectronics 

Functional description

STFPC320

4.4

Wake-up

The STFPC320 can wake-up from any one of the following sources:

● Front-panel keys

● Remote-control keys

● Real-time clock (RTC) in 3 conditions (alarm, watchdog timer, oscillator fail)

● External pin PIN_AV8 (only by a low-to-high transition on this pin)

Figure 6. Wake-up

Note: 1 When the hot-key is detected either from front-panel or remote control or RTC or from a low-

to-high transition on PIN_AV8 pin during standby, the STBY pin de-asserts.

2 The de-assertion of the STBY triggers the guard timer.

3 The timer value is the programmed value by the user (1-15s). If the user did not change the

value before entering standby, then it remains 10s.

4 Also note that the guard timer is off when the STFPC320 is in the standby mode.

Guard timer is thus triggered by a de-assertion of the STBY signal or by internal power on

reset signal.

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