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LC7267 Datasheet(PDF) 5 Page - Sanyo Semicon Device

Part No. LC7267
Description  Digital Display of Clock/Receiving Frequency for Radio Set Applications
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Maker  SANYO [Sanyo Semicon Device]
Homepage  http://www.ssdc-jp.com/eng/
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Make connection of the highest-order digit as shown below.
Timing Chart
Time setting (CTR/CLK = ‘‘L’’)
Sample Display at Each Display
(Setting by the time signal, hours-minutes display, hours-minutes setting)
Setting by the time signal: Setting to PM 12:00
Hours-minutes display: Display of PM 12:34
Hours-minutes setting: Setting to PM 11:45 from PM 11:23
12-hour system
24-hour system
Setting by the
time signal and
minutes setting
DEMAND pin
Flashing (2Hz) for setting by
the time signal
Mode of setting by
the time signal
Flashing stop
Hours-minutes
setting mode
Minutes
advance at
a 2 Hz rate
Hours-minutes
display
1.2 s. or more
Execution of counting
30min. or more as 1hr.
and disregarding 29min. or less
SET pin
Within 1.0 s.
Hours-minutes display
Hours setting
and minutes
setting
DEMAND pin
Flashing (2 Hz)
for setting by
the time signal
SET pin
(Hours setting)
Hours-minutes
setting mode
Flashing stop
1.2s
t: Approximately 100 ms.
Flashing (2 Hz)
for setting by
the time signal
Hours-minutes
setting mode
Flashing stop
Execution of minutes
setting
(Advance at a 2 Hz rate)
1.2s
Execution of hours
setting
(Advance at a 2 Hz rate)
Execute setting by
the time signal with
the SET pin.
Flashing ata2Hz rate when in
the mode of setting by the time
signal
PM
sign
When setting by the time signal is
executed, minutes become 00. If the
minutes display is at 30 to 59, hours are
incremented by 1 (counting 30 or more
as 1 hr. and disregarding 29 or less).
Flashing at a 2 Hz rate
The PM sign flashes in the afternoon when in the mode of
setting by the time signal, hours-minutes display,
hours-minutes setting.
(for 12-hour system).
PM sign
Set the SET pin to
VDD or VSS. After
lapse of 1.2 s,
flashing stops and
hours or minutes
advance at a 2 Hz
rate.
PM sign
Flashing at
a 2 Hz rate
PM
sign
Set the SET pin to VSS, and
setting is executed.
Set the SET pin to VDD, and
setting is executed.
LC7267
No. 1511- 5/10




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