HT1330 Holtek Semiconductor Inc, HT1330 Datasheet

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HT1330

Manufacturer Part Number
HT1330
Description
3 1/2 Digit Timer + Watch
Manufacturer
Holtek Semiconductor Inc
Datasheet
Features
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General Description
The HT1330 is a CMOS fabricated LSI chip de-
signed to drive a standard three and 1/2 digit
biplexed LCD for a count-up/down timer in
watch applications. The watch and timer are
based on a 32768Hz quartz crystal oscillator.
The maximum count-down time is 20 hours
with an accuracy of 1 second. The maximum
count-up period is 20 hours, but the LCD will
normally display a maximum period of 19 min-
utes and 59 seconds. If the user presses switch
²S2², the total count-up time in hours and min-
utes will be displayed. In the count-up/down
mode, the real time can be seen by pressing
Pin Assignment
A real time watch
A 20-hour adjustable range setting
20-minute count-up display cycle time
20 hours of count-up time maximum
Auto recycle or manual reset the
Hours and minutes are set independently
Real time display in timer mode
count-down timer
count-down timer by bonding option
3 1/2 Digit Timer + Watch
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switch ²S1² and return to the count-up/down
mode by releasing ²S1².
Once the count-down is finished, the timer can
either automatically recycle the preset time or
manually reset the desired time depending on
the selected bonding-pad option. The forecast
alarm generates 4 alarm sounds at 10 minutes
before set time and 8 alarm sounds at 5 minutes
before set time. The HT1330 can be used as a
parking timer, an alarm timer, a pill box timer,
a kitchen timer, a sports timer, etc.
5-minute/10-minute pre-alarm
DC output and piezo output
An internal voltage doubler
Busy flag output high in timer counting
3 1/2 digit LCD display
32768Hz crystal oscillator
Single 1.5V battery operation
48L-pin QFP package
HT1330
August 10, 2000

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HT1330 Summary of contents

Page 1

... The forecast alarm generates 4 alarm sounds at 10 minutes before set time and 8 alarm sounds at 5 minutes before set time. The HT1330 can be used as a parking timer, an alarm timer, a pill box timer, a kitchen timer, a sports timer, etc. 1 ...

Page 2

... S3>5 seconds into the real time setting mode S1/S2 to reset the timer to the initial state (0:00) S1/S2/S3 to return to the real time mode Pad Coordinates Pad X Y No. 1 -62.7 58.7 2 -62.7 48.7 3 -62.7 30.1 4 -62.7 17.2 5 7.3 -62.7 6 -62.7 -18.7 7 -62.7 -58.7 8 -52.7 -58.7 9 -42.7 -58.7 10 -32.7 -58.7 11 -22.7 -58.7 12 -12.7 -58.7 13 -2.7 -58.7 14 7.3 -58.7 15 17.3 -58 HT1330 Unit: mil Pad X Y No. 16 27.3 -58.7 17 37.3 -58.7 18 47.3 -58.7 19 58.3 -58.7 20 62.7 -38.8 21 62.7 -23.7 22 62.7 48.6 23 62.7 58.7 24 43.8 58.7 25 33.8 58.7 26 5.8 58.7 27 -4.3 58.7 28 -38.6 58.7 29 -48.6 58.7 August 10, 2000 ...

Page 3

... Segment drive O Segment drive O Common 2 drive I Oscillator input O Oscillator output O Timer busy flag, active high I/O Chip test pin I/O Fast-test control pin Negative power supply ¾ Positive power supply ¾ I Option pin for countdown recycle O Piezo drive O Piezo drive 3 HT1330 August 10, 2000 ...

Page 4

... The timer alarm will sound during the count-down process as listed below: 4 sounds are generated at 10 minutes before the set time is up. 8 sounds are generated at 5 minutes before the set time is up. 4 HT1330 Ta=25°C 1.50 1.70 V ¾ -1.5 -1 ...

Page 5

... Output Waveform At 0:00 in the timer mode, the alarm will sound when S1 and S2 are simultaneously depressed. This is for the alarm test only. After the device is powered on, the alarm will sound two seconds and all segments on the LCD display panel be illuminated. 5 August 10, 2000 HT1330 ...

Page 6

... Operational FlowChart 6 August 10, 2000 HT1330 ...

Page 7

... LCD Format Application Circuits August 10, 2000 HT1330 ...

Page 8

... Holtek reserves the right to alter its products without prior notification. For the most up-to-date information, please visit our web site at http://www.holtek.com.tw. 8 August 10, 2000 HT1330 ...

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