LSI LS3273E
Lcd 4 Digit Alarm Clock
With 1
With 1With 1
With 16 Dots Animation
6 Dots Animation6 Dots Animation
6 Dots Animation
Version1.0(05.03.18) 1 / 9 本規格書内容如有更改，恕不另行通知。
Features :
* 2-Function : Hour and Minute.
* 60-second Alarm.
* Snooze function.
* 7 switches.
* 32768HZ quartz crystal time base.
* Single 1.5v battery operation.
* Low power dissipation.
* Alarm sound demonstration with increasing alarm sound.
* Direct drive ½ bias 1/3 duty LCD.
* 12/24 Hour format bonding option.
* Built-in EL driver.
* 16 dots animation function.
Functional Description
The LS3273E is provided with HOUR, MINUTE and SNOOZE key. It also has
two switches :
the SETTING switch and ALARM ENABLE/DISABLE switch. It can be operated in
12 or 24 HOUR format depending on bonding option. This chip provides a variable
alarm sound with crescendo. 16 dots animation function. Built-in EL driver with 1.5
seconds of delay.
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.