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• If another ON input is applied during "On" display, the IC enters sleep mode.
The following operations are performed in sleep mode.
— The display is changed from "On" to "90".
— The display is held in that form for a 1 to 2 second period, and if another ON input is applied during this
display, the display changes to 60. Thereafter, each display is held for 1 to 2 seconds, and if another ON input
is applied, the display changes from "60" to "45" to "15" to the current time display, and then to "On" again.
If no ON input is applied during one of these 1 to 2 second waiting periods, the display returns to current time
display and the sleep counter is started.
However, note that when the sleep display changes from "15" to current time display, the RADIO OUTPUT
pin (pin 22) output goes off, i.e., to a low level output.
— If a snooze input (the application of a high or low level to the CAL DISP & SNOOZE pin) occurs during sleep
operation sleep operation is terminated and the RADIO OUTPUT pin (pin 22) is turned off, i.e., set to a low
level output.
— During display of the "On", 90, 60, 45, 30, and 15 sleep displays, only the alarm indicators for the enabled
alarms are displayed, and the colon and AM/PM displays are turned off.
• If the current time is changed (set) after setting the sleep interval, the length of the set sleep interval up to the point
the radio goes off may change. Therefore, if the current time is changed (set) after setting the sleep interval it will
be necessary to reset the desired sleep interval.
Example: Set the sleep interval to 60 minutes. Then, either quick advance or quick return the current time
by 25 minutes using the current time setting mode. At this point, the sleep counter will have
been advanced by the amount the current time was advanced or set back, and the actual sleep
time will be 35 minutes.
LC85632
Figure 19 Sleep Setting Time Display
Figure 20 Sleep Setting Timing
No. 4659-27/34
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