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HT1330中文资料

HT1330

31/2Digit Timer +Watch

Pin Assignment

1August 10,2000

General Description

The HT1330is a CMOS fabricated LSI chip de-signed to drive a standard three and 1/2digit 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 20hours with an accuracy of 1second.The maximum count-up period is 20hours,but the LCD will normally display a maximum period of 19min-utes and 59seconds.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

switch 2S12and 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 4alarm sounds at 10minutes before set time and 8alarm sounds at 5minutes before set time.The HT1330can be used as a parking timer,an alarm timer,a pill box timer,a kitchen timer,a sports timer,etc.

Features

·A real time watch

·A 20-hour adjustable range setting count-down timer

·20-minute count-up display cycle time ·20hours of count-up time maximum ·Auto recycle or manual reset the count-down timer by bonding option

·Hours and minutes are set independently ·

Real time display in timer mode

·5-minute/10-minute pre-alarm ·DC output and piezo output ·An internal voltage doubler

·Busy flag output high in timer counting ·31/2digit LCD display ·32768Hz crystal oscillator ·Single 1.5V battery operation ·48L-pin QFP package

Pad Assignment Pad Coordinates Unit:mil

Pad

No.X Y Pad

No.X Y

1-62.758.71627.3-58.7

2-62.748.71737.3-58.7

3-62.730.11847.3-58.7

4-62.717.21958.3-58.7

5-62.77.32062.7-38.8

6-62.7-18.72162.7-23.7

7-62.7-58.72262.748.6

8-52.7-58.72362.758.7

9-42.7-58.72443.858.7

10-32.7-58.72533.858.7

11-22.7-58.726 5.858.7

12-12.7-58.727-4.358.7

13-2.7-58.728-38.658.7

147.3-58.729-48.658.7

1517.3-58.7

Chip size:119′112(mil)2

*The IC substrate should be connected to VDD in the PCB layout artwork.

Operational Sequence

Note:S1for Hour setting

S2for Minute setting

S3to Start/Stop the timer

S3>5seconds into the real time setting mode

S1/S2to reset the timer to the initial state(0:00)

S1/S2/S3to return to the real time mode

2August10,2000

Pin/Pad Description

Pin No.Pad No.Pad Name I/O Description

111S3I Input to start/stop the timer

142S2I Input for minute setting

163S1I Input for hour setting

174VEE?Negative voltage supply for LCD display

185CAP2O For voltage doubling capacitor

206CAP1O For voltage doubling capacitor

247COM1O Common1drive

258BC3O Segment drive

269AG3O Segment drive

2710FE3O Segment drive

2811BC2O Segment drive

2912ADG2O Segment drive

3013FE2O Segment drive

3114COD3O Segment drive

3315BC1O Segment drive

3416AG1O Segment drive

3517FE1O Segment drive

3618KD1O Segment drive

3719COM2O Common2drive

3820OSC1I Oscillator input

3921OSC2O Oscillator output

4622BUSY O Timer busy flag,active high

4723T2I/O Chip test pin

424T1I/O Fast-test control pin

525VSS?Negative power supply

626VDD?Positive power supply

827OP I Option pin for countdown recycle

928BZ O Piezo drive

1029BZB O Piezo drive

3August10,2000

Absolute Maximum Rating

Supply Voltage.................................-0.3V to 5V Storage Temperature.................-50°C to 125°C Input Voltage.................V SS -0.3V to V DD +0.3V

Operating Temperature ................-0°C to 70°C

Note:These are stress ratings only.Stresses exceeding the range specified under 2Absolute Maxi-mum Ratings 2may cause substantial damage to the device.Functional operation of this de-vice at other conditions beyond those listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliability.

Electric Characteristics

Ta=25°C

Symbol Parameter

Test Conditions Min.Typ.Max.Unit V DD Conditions

V DD Supply Voltage 1.5V ?

1.25 1.50 1.70V I DD Operating Current 1.5V fosc=32768Hz No load

??2m A V EE Display Voltage 1.25~1.7V ?

-1.2-1.5-1.7V I IN Switch Input Current 1.5V V IN =VDD 5?65m A V STR Osc Starting Voltage ?Within 3secs

1.35??V D f/f Frequency Stability

1.25~1.7V ?

??10PPM I OHA Alarm Output Drive Current 1.5V V OH =1.35V

-480??m A f OUT Alarm Output Frequency 1.5V ?

?4096?Hz I OHF

Busy Flag Output Drive Current

1.5V

V OH =1.35V

-480

m A

August 10,2000

Functional Description

When power is turned on,all the LCD segments are illuminated to display 218:882and the alarm sounds 2seconds.

For fast-test,hold the 2TP12pin high and the minute digit will be increased every second.In the count-down mode,when the time has gone past the set time and the alarm is stopped,the set time will remain at its current state or be reset to 0:00depending on the bonding of the 2OPT 2pin to VDD.

In the timer mode,while the timer is counting,the actual time can be displayed by pressing 2S12.Once 2S12is released,the count-down time will

be shown instead.

In the count-up mode,the LCD display is nor-mally in minutes and seconds where the maxi-mum count-up period is 20minutes.If 2S22is pressed,the LCD display will revert to hours and minutes and the maximum count-up time will turn out to be 20hours.

The timer alarm will sound during the count-down process as listed below:

4sounds are generated at 10minutes before the set time is up.

8sounds are generated at 5minutes before the set time is up.

Output Waveform

5August 10,2000

Once the set time is reached,the alarm will sound 60seconds unless it is stopped by users (by pressing S3),in which case the preset time of the timer will remain unchanged or at 0:00depending on the status of the option pin.Pressing any one of the inputs (S1or S2or S3)will stop the alarm during the period for which the alarm is sounding.

At 0:00in the timer mode,the alarm will sound when S1and S2are 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.

Operational FlowChart

6August10,2000

LCD Format

Application Circuits

7August10,2000

8August 10,2000

The information appearing in this Data Sheet is believed to be accurate at the time of publication.However,Holtek assumes no responsibility arising from the use of the specifications described.The applications mentioned herein are used solely for the purpose of illustration and Holtek makes no warranty or representation that such applications will be suitable without further modification,nor recommends the use of its products for application that may pres-ent a risk to human life due to malfunction or otherwise.Holtek reserves the right to alter its products without prior notification.For the most up-to-date information,please visit our web site at https://www.wendangku.net/doc/dd11986106.html,.

Holtek Semiconductor Inc.(Headquarters)

No.3Creation Rd.II,Science-based Industrial Park,Hsinchu,Taiwan,R.O.C.Tel:886-3-563-1999Fax:886-3-563-1189

Holtek Semiconductor Inc.(Taipei Office)

5F,No.576,Sec.7Chung Hsiao E.Rd.,Taipei,Taiwan,R.O.C.Tel:886-2-2782-9635Fax:886-2-2782-9636

Fax:886-2-2782-7128(International sales hotline)

Holtek Semiconductor (Hong Kong)Ltd.

RM.711,Tower 2,Cheung Sha Wan Plaza,833Cheung Sha Wan Rd.,Kowloon,Hong Kong Tel:852-2-745-8288Fax:852-2-742-8657