STFPC311(2012) View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

STFPC311
(Rev.:2012)

Front panel controller/driver with standby power management

STMicroelectronics 

Initialization

STFPC311

3.6.3

Watchdog timer operation during standby

● When a hot-key signal is detected either from the front panel or remote control during

standby, the STBY de-asserts.

● The de-assertion of the STBY triggers the watchdog timer.

● The timer value is the programmed value that is set by the user (1s-15s). If the user did

not change the value before entering standby, then it remains 10s.

● Also note: that The watchdog timer is off when the STFPC311 is in the standby mode

to save power.

Figure 5. Standby condition

t(s) 3a) Standby Condition (Normal behavior)

uc Hot key command from IR

d or Key pad for wake up

WDG timer triggers

Pro STBY

solete READY

b MUTE

READY asserts within programmed timer value (1s-15s)

uct(s) - O 3b) Standby Condition (Abnormal behavior, processor is not responding)

rodHot key command from IR WDG timer

P or Key pad for wake up

triggers

Signals STBY after

WDG count is over

Obsolete STBY

READY

READY continues to remain low

MUTE

The watchdog timer is triggered by a de-assertion of the STBY signal or by the internal

Power-on Reset signal. It is not affected by the STB pin.

12/39

Doc ID 12324 Rev 2

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