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Application of a high or
low level to the ALM-A/B
DISP & SEL pin, thus
selecting the alarm display
and setting mode.
Application of a high or
low level to the ALM-A/B
DISP & SEL pin, thus
selecting the alarm display
and setting mode.
Clearing alarm display
and setting mode.
(Making the ALM-A/B
DISP & SEL pin open.)
The following are the alarm stop conditions during output.
• An OFF input (pin 22 = VSS)
• An ON input (pin 22 = VDD)
• Arrival at the point 59 minutes following start of alarm output.
• A snooze input (pin 21 = VDD or VSS) (Alarm output restarts after the completion
of the snooze operation.)
• The start of another alarm operation during alarm operation.
Figure 8 Operating State Transitions 3: Alarm Display and Setting Block
LC85632
From initial state
State
Initial state
Display
Alarm
Numbers
12 00
Colon
Flashing
ALM IND
Either A or B flashing
Depends on the
AM/PM
display mode
Operation
ALARM
Operation enabled
SLEEP
—
SNOOZE
—
Note: If the current time display is
flashing, that flashing is
stopped.
State
Alarm time setting
Display
Alarm
Numbers
Set time display
Colon
Flashing
ALM IND
Either A or B flashing
Depends on the
AM/PM
display mode
Alarm setting time
Operation
display
ALARM
Operation enabled
SLEEP
—
SNOOZE
—
Note:
Application of a low
level to the MANUAL/
SLEEP pin.
State
Alarm operation disable
Display
Alarm
Numbers
Set time display
Colon
Flashing
ALM IND
Enabled alarm flashing
Depends on the
AM/PM
display mode
Alarm setting time
Operation
display
ALARM
Operation enabled
SLEEP
—
SNOOZE
—
Note: In the alarm not set mode, the
alarm will not operate even if
the set time is the same as the
current time.
Application of a
high or low level
to the TIME SET
INPUT pin.
State
Display
Numbers
Colon
Application of a
ALM IND
high or low level
AM/PM
to the TIME SET
INPUT pin.
Operation
ALARM
SLEEP
SNOOZE
Making the TIME
Note:
Alarm output starts if the
SET INPUT pin
current time matches the
open.
setting time.
Alarm time setting
Alarm
Linked to the + and
– inputs
Flashing
Either A or B flashing
Depends on the
display mode
Linked to the + and
– inputs
Operation enabled
—
—
No. 4659-16/34
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