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LS3273E Datasheet(PDF) 2 Page - BOWIN ELECTRONIC CO. |
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LS3273E Datasheet(HTML) 2 Page - BOWIN ELECTRONIC CO. |
2 / 9 page LSI LS3273E Version1.0(05.05.10) 2 Functional Description 24-hour format is selected when the MODE pad is connected to VDD. 12-hour format is selected when the MODE pad is connected to GND. PM indicator is on from 12:00PM to 11:00PM off from 12:00AM to 11:59AM in 12-hour format. Colon ON in “Alarm Time” mode and 0.5sec ON, 0.5 sec OFF in “Normal Time” mode. Alarm Time indicator ON in “Alarm Time” mode, OFF in “Normal Time” mode. Snooze indicator ON in “Snooze Standby” mode, 0.5 sec ON, 0.5 sec OFF in “Snooze” mode and OFF in “Alarm Off” mode. Alarm indicator is ON in “Alarm ON” mode, OFF in “Alarm OFF” mode. In “Setting” mode, - hour digit advances by +1 when HR switch is depressed - minute digit advances by +1 when MIN switch is depressed - digit (hour or minute) advances automatically at 4 HZ rate by keeping HR switch or MIN switch depressed more than 2 seconds. MODE SELECT Alarm time is displayed while HR or MIN switch is depressed; “Setting” mode is selected by depressing either NORS or ALS switch; and “Alarm” is selected by pressing ALMOFF and SNZ switches simultaneously. ALARM FUNCTION Alarm function can be operated in all modes except alarm off mode. Alarm buzzer sounds for 1 minute in either alarm standby or snooze standby mode when normal time corresponds to set alarm time. A momentary closure of ALSTOP, of changing of any mode switches will stop the alarm buzzer sound. SNOOZE FUNCTION Snooze function can be operated in Alarm Time mode, Alarm Time Setting mode, and Normal Time Setting mode. When Snooze Stand-by mode is selected and normal time corresponds to alarm time, buzzer sound will output and snooze indicator will flash at 1HZ rate; 0.5 sec ON, 0.5 sec OFF, and snooze function will operate. If ALSTOP switch is turned ON while buzzer is sounding, alarm sound will be suspended once, but buzzer sound will start 4 minutes later and will continue. If ALSTOP switch is not turned ON while buzzer is sounding, alarm sound will stop after 1 minute, and snooze operation will be released, returning the clock to Snooze Standby mode. Snooze function can also be cancelled by changing of any mode switch. EL FUNCTION When KSET is pressed At any mode, the EL/LIGHT delay is around 1.5 seconds. |
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