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HT1330 3 1/2 Digit Timer + Watch
Features
* * * * * * *
A real time watch A 20-hour adjustable range setting count-down timer 20-minute count-up display cycle time 20 hours 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 3 1/2 digit LCD display 32768Hz crystal oscillator Single 1.5V battery operation 48L-pin QFP package
General Description
The HT1330 is a CMOS fabricated LSI chip designed 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 minutes and 59 seconds. If the user presses switch S2, the total count-up time in hours and minutes will be displayed. In the count-up/down mode, the real time can be seen by pressing switch S1 and return to the count-up/down mode by releasing S1. 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.
Pin Assignment
CO OS OS BU M2 C1 C2 NC NC NC NC NC NC SY T2 NC 1 2 3 4 5 6 7 8 9 1 1 1 4847464544 4342 4140393837 3 3 3 3 3 3 HT1330 3 48L Q FP 2 2 2 0 2 1 2 2 131415161718192021222324 6 5 4 3 2 1 0 9 8 7 6 5 S2 NC KD1 FE1 AG1 BC1 NC COD3 FE2 ADG2 BC2 FE3 AG3 BC3
NC NC T1 VSS VDD NC OP BZ BZB S3 NC NC
COM1 NC NC NC CAP1 NC CAP2 VEE S1 NC
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HT1330
Pad Assignment
VDD VSS BZB OP BZ T1 T2 23 22 BUSY S3 S2 2 1 29 28 27 26 25 24
Pad Coordinates
Pad No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 X -62.7 -62.7 -62.7 -62.7 -62.7 -62.7 -62.7 -52.7 -42.7 -32.7 -22.7 -12.7 -2.7 7.3 17.3 Y 58.7 48.7 30.1 17.2 7.3 -18.7 -58.7 -58.7 -58.7 -58.7 -58.7 -58.7 -58.7 -58.7 -58.7 Pad No. 16 17 18 19 20 21 22 23 24 25 26 27 28 29 X
Unit: mil Y -58.7 -58.7 -58.7 -58.7 -38.8 -23.7 48.6 58.7 58.7 58.7 58.7 58.7 58.7 58.7
S1 VEE CAP2 5 4
3
(0 ,0 )
CAP1 6
21
OSC2
20
OSC1
COM1 7
8 BC3
9 AG3
10 FE3
11 BC2
12 ADG2
13 FE2
14 COD3
15 BC1
16 AG1
17 FE1
18 KD1
19 COM2
27.3 37.3 47.3 58.3 62.7 62.7 62.7 62.7 43.8 33.8 5.8 -4.3 -38.6 -48.6
Chip size: 119 112 (mil)
2
* The IC substrate should be connected to VDD in the PCB layout artwork.
Operational Sequence
S3 Pow eron R e a l T im e S e ttin g S 3 > 5sec R e a l T im e S 1 /S 2 C o u n t-d o w n T im e S e ttin g S3 C o u n t- d o w n T im e r S 1 /S 2 o r S 1 /S 2 /S 3 S1 orS2 S 1 /S 2 /S 3 U p /D o w n T im e r S3 C o u n t- u p T im e r S 1 /S 2 o r S 1 /S 2 /S 3 S 1 /S 2
Note: S1 for Hour setting S2 for Minute setting S3 to Start/Stop the timer 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
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Pin/Pad Description
Pin No. 11 14 16 17 18 20 24 25 26 27 28 29 30 31 33 34 35 36 37 38 39 46 47 4 5 6 8 9 10 Pad No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 Pad Name S3 S2 S1 VEE CAP2 CAP1 COM1 BC3 AG3 FE3 BC2 ADG2 FE2 COD3 BC1 AG1 FE1 KD1 COM2 OSC1 OSC2 BUSY T2 T1 VSS VDD OP BZ BZB I/O I I I 3/4 O O O O O O O O O O O O O O O I O O I/O I/O 3/4 3/4 I O O Description Input to start/stop the timer Input for minute setting Input for hour setting Negative voltage supply for LCD display For voltage doubling capacitor For voltage doubling capacitor Common 1 drive Segment drive Segment drive Segment drive Segment drive Segment drive Segment drive Segment drive Segment drive Segment drive Segment drive Segment drive Common 2 drive Oscillator input Oscillator output Timer busy flag, active high Chip test pin Fast-test control pin Negative power supply Positive power supply Option pin for countdown recycle Piezo drive Piezo drive
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Absolute Maximum Rating
Supply Voltage.................................-0.3V to 5V Input Voltage .................VSS-0.3V to VDD+0.3V Storage Temperature.................-50C to 125C Operating Temperature ................-0C to 70C
Note: These are stress ratings only. Stresses exceeding the range specified under Absolute Maximum Ratings may cause substantial damage to the device. Functional operation of this device at other conditions beyond those listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliability.
Electric Characteristics
Symbol VDD IDD VEE IIN VSTR Df/f IOHA fOUT IOHF Parameter Supply Voltage Operating Current Display Voltage Switch Input Current Osc Starting Voltage Frequency Stability Alarm Output Drive Current Alarm Output Frequency Busy Flag Output Drive Current Test Conditions VDD 1.5V 1.5V 1.25~1.7V 1.5V 3/4 1.25~1.7V 1.5V 1.5V 1.5V Conditions 3/4 fosc=32768Hz No load 3/4 VIN=VDD Within 3 secs 3/4 VOH=1.35V 3/4 VOH=1.35V Min. 1.25 3/4 -1.2 5 1.35 3/4 -480 3/4 -480
Ta=25C Typ. Max. Unit 1.50 3/4 -1.5 3/4 3/4 3/4 3/4 4096 3/4 1.70 2 -1.7 65 3/4 10 3/4 3/4 3/4 V mA V mA V PPM mA Hz mA
Functional Description
When power is turned on, all the LCD segments are illuminated to display 18:88 and the alarm sounds 2 seconds. For fast-test, hold the TP1 pin 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 0:00 depending on the bonding of the OPT pin to VDD. In the timer mode, while the timer is counting, the actual time can be displayed by pressing S1. Once S1 is released, the count-down time will be shown instead. In the count-up mode, the LCD display is normally in minutes and seconds where the maximum count-up period is 20 minutes. If S2 is pressed, the LCD display will revert to hours and minutes and the maximum count-up time will turn out to be 20 hours. 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.
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Once the set time is reached, the alarm will sound 60 seconds unless it is stopped by users (by pressing S3), in which case the preset time of the timer will remain unchanged or at 0:00 depending on the status of the option pin. Pressing any one of the inputs (S1 or S2 or S3) will stop the alarm during the period for which the alarm is sounding. 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.
Output Waveform
1 0 m in u te s b e fo r e s e t tim e is u p
6 2 .5 m s
0
sec
1
sec
2
sec
5 m in u te s b e fo r e s e t tim e is u p
6 2 .5 m s 6 2 .5 m s
0
sec
1
sec
2
sec
T im e is u p
6 2 .5 m s 6 2 .5 m s
0
sec
1
sec
60
sec
T im e r b u s y fla g o u tp u t
VDD VSS T im e r is c o u n tin g u p o r d o w n
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Operational FlowChart
N o te : S 1 /S 2 : tw o S 1 /S 2 /S 3 : S 3>5s:S 3 S1,S2,S3 # : R e p re s e *: R e p re s e
Pow eron
k e y p re s s e d s th re e k e y p re s k e y is p r e s s e d : th e k e y is p r e n ts 2 H z fla s h n ts 1 H z fla s h
yn se m ss
ch d o n tim e o re th a n 5 s ed
1 8 :8 8 * 0 :0 0 R e a l tim e s e ttin g S3>5s NO * 1 2 :5 9
P ie z o s o u n d s 2 s e c o n d s fo r a la r m A ll s e g m e n t o n fo r L C D te s t
te s t
A fte r 2 s e c o n d
S 1 to a d ju s t h o u r - d ig it S 2 to a d ju s t m in u te - d ig it
YES R e a l tim e p la y in g m o d e A
YES
S3 S 1 /S 2 NO E n te r th e c o u n te r M o d e A la r m YES NO C o u n t_ d o w n M o d e C o u n t_ d o w n tim e s e ttin g S3 # 1 9 :5 9 C o u n t_ d o w n tim e p la y in g YES A la r m b ib i S 1 to a d ju s t h o u t- d ig it S 2 to a d ju s t m in u te - d ig it OP Bonded o p tio n te s t
0 :0 0 B C o u n t_ u p M o d e YES S 1 /S 2 S3
0 :0 1
C o u n t-u p p la y in g
S2 S 2 to s h o w th e countnum ber
NO
S1,S3, S 1 /S 2 , S 1 /S 2 / S3
NO
0 :0 0
NO
A n y k e y to p re s s
YES
S 1 /S 2 to B
S 1 /S 2 /S 3 to A
S 1 to d is p la y th e r e a l tim e
S 3 fo r s ta rt/ s to p c o u n te r
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LCD Format
A 2 D 2 /G 2 C O L /D 3 COM1 COM2 K F1 E1 G1 D1 A 1 /G 1 A 3 /G 3 B 1 /C 1 B 2 /C 2 B 3 /C 3 F 1 /E 1 F 2 /E 2 F 3 /E 3 K /D 1
A1 B1 C1 COL COL D2 F2 E2
A2 B2 G2 C2 E3 F3
A3 B3 G3 D3 C3
Application Circuits
V
DD
P ie z o S3 1 2 S2 S1 0 .0 1 m F 4 5 0 .0 1 m F 6 21 20 7 8 9 10 11 12 13 14 15 16 17 18 19 32768H z X 'T A L 20M W 3
23 29 28 27 26 25 24 22
B usy
HT1330
11 B ip le x e d L C D
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Holtek Semiconductor Inc. (Headquarters) No.3 Creation Rd. II, Science-based Industrial Park, Hsinchu, Taiwan, R.O.C. Tel: 886-3-563-1999 Fax: 886-3-563-1189 Holtek Semiconductor Inc. (Taipei Office) 5F, No.576, Sec.7 Chung Hsiao E. Rd., Taipei, Taiwan, R.O.C. Tel: 886-2-2782-9635 Fax: 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, 833 Cheung Sha Wan Rd., Kowloon, Hong Kong Tel: 852-2-745-8288 Fax: 852-2-742-8657 Copyright O 2000 by HOLTEK SEMICONDUCTOR INC. 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 present 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 http://www.holtek.com.tw.
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