Holtek Semiconductor Inc HT1330 Datasheet

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

·

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 min­utes and 59 seconds. If the user presses switch
²S2², 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

HT1330

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

·

-

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.

Pin Assignment

BUSY

NC

NCNCNCNCNC

T2

484746 45 44 43 42 41 40 39 3837

1

NC

2

NC

3

NC

4

T1

5

VSS

6

VDD

7

NC

8

OP

BZ

9

BZB

10

S3

11

NC

12

13 1415 161718 19 20 21 222324

NCS2NCS1VEE

H T 1330
48L Q FP

OSC2

OSC1

NC

CAP2NCCAP1NCNCNCCOM 1

COM 2

KD1

36

FE1

35

AG1

34

BC1

33

NC

32

COD3

31

FE2

30

ADG 2

29

BC2

28

FE3

27

AG3

26
25

BC3

1 August 10, 2000

HT1330

Y

2

Pad Assignment Pad Coordinates Unit: mil

S3

S2

S1

VEE

CAP2

CAP1

COM 1

BZB

BZ

1

5

6

7

28

29

8

9

10

11

BC2

FE3

AG3

BC3

Chip size: 119 ´ 112 (mil)

12

VDD

OP

26

27

(0 ,0 )

13

14

COD3

FE2

ADG 2

VSS

25

16 2 17 3 18 4 19

15

FE1

AG1

BC1

2

T1

24

T2

23

22

21

20

COM 2

KD1

BUS

OSC

OSC1

Pad

No.

1

-62.7

2

-62.7

3

-62.7

4

-62.7

5

-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
15 17.3

XY

58.7 16 27.3

48.7 17 37.3

30.1 18 47.3

17.2 19 58.3

7.3 20 62.7

-58.7

-58.7

Pad

No.

XY

-58.7

-58.7

-58.7

-58.7

-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
28
29

-38.6

-48.6

-4.3

58.7

58.7

58.7

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

Operational Sequence

Power on

R eal T im e S etting

C ount-dow n
T im e S e ttin g

S3

C ount-dow n Tim er

S1/S 2 or S 1/S2/S 3

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

S3

S3 > 5sec

S1 or S2

R eal T im e

S1/S2

U p/D ow n Tim er

S3

C ount-up Tim er

S1/S 2 or S 1/S2/S 3

S1/S2/S3

S1/S2

2 August 10, 2000

Pin/Pad Description

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

11 1 S3

14 2 S2

16 3 S1

17 4 VEE

18 5 CAP2

20 6 CAP1

24 7 COM1

25 8 BC3

26 9 AG3

27 10 FE3

28 11 BC2

29 12 ADG2

30 13 FE2

31 14 COD3

33 15 BC1

34 16 AG1

35 17 FE1

36 18 KD1

37 19 COM2

38 20 OSC1

39 21 OSC2

46 22 BUSY

47 23 T2

424T1

5 25 VSS

6 26 VDD

827OP

928BZ

10 29 BZB

I Input to start/stop the timer

I Input for minute setting

I Input for hour setting

Negative voltage supply for LCD display

¾

O For voltage doubling capacitor

O For voltage doubling capacitor

O Common 1 drive

O Segment drive

O Segment drive

O Segment drive

O Segment drive

O Segment drive

O Segment drive

O Segment drive

O Segment drive

O Segment drive

O 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

HT1330

3 August 10, 2000