STFPC311BTR STMicroelectronics, STFPC311BTR Datasheet - Page 11

• Manufacturer Part Number: STFPC311BTR
• Description: IC CTRL/DRIVER FRONT PNL 52-PQFP
• Manufacturer: STMicroelectronics

Specifications of STFPC311BTR

• Display Type: Vacuum Fluorescent (VF)
• Interface: Serial
• Current - Supply: 5mA
• Voltage - Supply: 3 V ~ 33.3 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 52-MQFP, 52-PQFP
• Maximum Operating Temperature: + 85 C
• Maximum Clock Frequency: 1 MHz
• Maximum Output Current: 25 mA
• Maximum Power Dissipation: 1200 mA
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• For Use With: 497-8394 - BOARD DEMO STFPC311/ST72264497-6454 - BOARD EVAL BASED ON STFPC311
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Configuration: -
• Digits Or Characters: -
• Lead Free Status / Rohs Status: Details
• Other names: 497-6107-2

STFPC311
3.6.3
Figure 5.
Watchdog timer operation during standby
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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.
Standby condition
3b ) S ta n d b y C o n d itio n ( A b n o rm a l b e h a vio r, p ro c e s s o r is n o t re s p o n d in g)
3b ) S ta n d b y C o n d itio n ( A b n o rm a l b e h a vio r, p ro c e s s o r is n o t re s p o n d in g)
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.
3 a ) S ta n d b y C o n d itio n (N o rm a l b e h a vio r )
3 a ) S ta n d b y C o n d itio n (N o rm a l b e h a vio r )
H o t ke y co m m a n d fro m IR
H o t ke y co m m a n d fro m IR
o r K e y p a d fo r w a ke u p
o r K e y p a d fo r w a ke u p
H o t ke y co m m a n d fro m IR
H o t ke y co m m a n d fro m IR
o r K e y p a d fo r w a ke u p
o r K e y p a d fo r w a ke u p
R E A D Y
R E A D Y
M U T E
M U T E
S T B Y
S T B Y
R E A D Y
R E A D Y
M U T E
M U T E
S T B Y
S T B Y
R E A D Y a sse rts w ith in p ro g ra m m e d tim e r va lu e (1 s-1 5 s)
R E A D Y a sse rts w ith in p ro g ra m m e d tim e r va lu e (1 s-1 5 s)
W D G tim e r
W D G tim e r
W D G tim e r trig g e rs
W D G tim e r trig g e rs
trig g e rs
trig g e rs
S ig n a ls S T B Y a fte r
S ig n a ls S T B Y a fte r
W D G co u n t is o ve r
W D G co u n t is o ve r
R E A D Y co n tin u e s to re m a in lo w
R E A D Y co n tin u e s to re m a in lo w
3 Initialization
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