Datasheet HT1350 Datasheet (Holtek Semiconductor Inc)

Features

Operating voltage: 1.5V

·

Auto walking or jogging detection

·

Step number/mileage/kilometer/calorie

·

display
LCD display

·

General Description

The HT1350 is a step counter IC implemented
in the CMOS technology. It provides an LCD
with a whole course (kilometer/mile) as well as
the consumed calorie display.

The HT1350 consists of internal oscillator cir
cuit, a step number/kilometer/mile/calorie step

Block Diagram

HT1350

Step Counter

An oscillator with 32kHz

·

Few external components

·

Low power consumption

·

An LCD with 1/3 duty, 1/2 bias

·

counter, a voltage doubler, and an LCD display
multiplexer.

The IC can automatically distinguish walking
from jogging, thus making appropriate calcula
tions.

-

VDD VSS

-

OSC1

OSC2

STEP

WALK/RUN

AUTO /M AN U

MODE

O scillator

P re scaler

Step Pulse

G enerator

Auto-Detect

Circuit

(Jog/W alk)

M ode

Switch

Level Shift

Circuit

CP1 CP2 CP3 COM1 COM2 COM3 OUT4 OUT17

Step

C ounter

Mile

C ounter

M u lt ip le x e r C irc u it

1 June 28, 1999

Km

C ounter

TEST1
TEST2

TEST3

RESET

Cales

C ounter

Pad Assignment

HT1350

AUTO /M AN U

WALK/RUN

RESET

MODE

VSS

TEST3

VDD

TEST2

TEST1

OSC2

OSC1

OUT17

OUT16

OUT15

OUT14

1

2

3

4

5

6

7

8

32

92510

OUT13

11

OUT12

OUT11

30

31

13

12

OUT9

OUT10

Chip size: 2725 ´ 2780 (mm)

(0,0)

14

OUT8

29

28

16

15

OUT7

OUT6

26

27

STEP

24

CP1

23

CP2

22

CP3

21

COM 1

20

COM 2

18

17

19

OUT5

OUT4

COM 3

2

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

Pad No. X Y Pad No. X Y

1
2
3
4
5
6
7
8

9
10
11
12
13

-1206.00

-1206.00

-1206.00

-1206.00

-1206.00 -159.50

-1206.00 -359.50

-1206.00 -624.50

-1206.00 -824.50

-1098.00 -1190.50

-898.00 -1190.50

-633.00 -1190.50

-433.00 -1190.50

-168.00 -1190.50

14 32.00
15 297.00
16 497.00

1159.50 17 762.00

994.50 18 962.00

661.70 19 1202.00

71.50 20 1202.00
21 1202.00
22 1202.00
23 1202.00 65.50
24 1202.00 259.50
25 1202.00 537.00
26 1078.00 1167.50
27 812.00 1167.50
28 631.00 1167.50
29 447.00 1167.50

-1190.50

-1190.50

-1190.50

30
31
32

-59.00

-259.00

-966.00

-1190.50

-1190.50

-1190.50

-753.50

-335.50

-135.50

1167.50

1167.50

1167.50

Unit: mm

2 June 28, 1999

Pad Description

HT1350

Pad No Pad Name I/O

1 TEST2 I/O

2 TEST1 I/O

3 OSC2 O

4 OSC1 I

Internal

Connection

¾

¾

¾

¾

Descriptions

For IC test only

For IC test only

Oscillator output

Oscillator input

5~18 OUT17~OUT4 O CMOS Display data output pads for segments

19~21 COM3~COM1 O NMOS Display data output pads for commons

22 CP3 O * Bias supply voltage pad for driving the LCD panel

23~24 CP2~CP1 O * LCD bias supply voltage control pads

I

CMOS

Pull-high

CMOS

Pull-high

CMOS

Pull-high

¾

¾

¾

CMOS

Pull-high

CMOS

Pull-high

Step sensor input pad

Walk/Run mode manual set pad

Auto detection/Manual set selection pad

Positive power supply

For IC test only

Negative power supply (GND)

LCD display mode selection

System reset pad

25 STEP I

26 WALK/RUN

27 AUTO/MANU I

28 VDD I

29 TEST3 I/O

30 VSS I

31 MODE O

32 RESET O

Approximate internal connection circuits

CMOS IN

Pull-high

VDD

CMOS OUT

(F o r C O M 1 ~ C O M 3 )

NMOS OUT

CP1

COM 1~

COM 3

VSS

3 June 28, 1999

CP3

CP2

OSCILLATORCP1~CP3

VDD VD D

OSC1

OSC2

Absolute Maximum Ratings

HT1350

Supply Voltage.................................-0.3V to 5V

Input Voltage .................V

-0.3V to VDD+0.3V

SS

Storage Temperature.................-50°Cto125°C

Operating Temperature ..................0°Cto70°C

Note: These are stress ratings only. Stresses exceeding the range specified under ²Absolute Maxi

mum Ratings² may 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.

Electrical Characteristics

Ta=25°C

Test Conditions

Symbol Parameter

V

I

I

V

V

f

DD

DD

STB

IL

IH

OSC

Operating Voltage

Operating Current 1.5V

Standby Current 1.5V

Input Low Voltage 1.5V

Input High Voltage 1.5V

System Frequency 1.5V

DD

Conditions

V

¾¾

No load,

=32kHz

f

OSC

¾¾

¾¾¾

¾

¾¾32¾

Min. Typ. Max. Unit

1.3 1.5 1.7 V

¾

1.5 3

0.5 1

0.2V

DD

0.8V

¾¾

DD

kHz

mA

mA

V

V

Functional Description

The HT1350 is a step counter IC. It is used to au­tomatically count the step number taken by a
runner and to display the whole course (kilome­ter/mile) combined with the calories consumed
on the LCD.

The IC is turned on and off with respect to the
on/off status of a short of spring switch which
corresponds to the up/down motion of the steps.
The output of step number can be changed to
kilometers/miles or calories by counting the to
tal number of times the step switch is closed.

The IC can automatically distinguish between
walking and jogging and make the according
calculations. The output of the LCD is busy
when the RESET key is pressed. Once the LCD
is in the busy state, the step counter will start
counting at 0 after 0.5 seconds till the runner
stops running and stands still. After the step
counter stops counting, pressing the MODE
key will display the step number®mile®kilo
meter®calorie in sequence.

-

-

-

-

4 June 28, 1999

LCD Display

D ig it 5 D ig it 4 D ig it 3 D ig it 2 D ig it 1

a

HT1350

f

g

e

d

12345

12345

Com1

Com2

Application Circuit

Com3

b

c

D3c

D2e

D2f

D2a

P1

D2d

D2g

D2b

D1e

D1f

D1a

14 15 16

14 15 16

D1d

P1 P2

D1g

D2c

D1c

D1b

D4c

Cals

17

17

M ile s

D5c

Km

D5e

D5f

D5a

P2

6 7 8 9 10 11 12 13

6 7 8 9 10 11 12 13

D4d

D3e

D3f

D3a

D3d

D3g

D3b

D5d

D5g

D5b

D4e

D4f

D4a

D4g

D4b

102

1.5V

COM 1 CO M2

COM 3

OUT4 OUT17

CP3

VDD

VSS

OSC1 OSC2 RESET MODE

0 6 !#

32kHz

5 June 28, 1999

X 14

CP1

102

CP2

STEP

HT1350

Holtek Semiconductor Inc. (Headquarters)

No.3 Creation Rd. II, Science-based Industrial Park, Hsinchu, Taiwan, R.O.C.
Tel: [phone]
Fax: [phone]

Holtek Semiconductor Inc. (Taipei Office)

5F, No.576, Sec.7 Chung Hsiao E. Rd., Taipei, Taiwan, R.O.C.
Tel: [phone]
Fax: [phone]
Fax: [phone] (International sales hotline)

Holtek Microelectronics Enterprises Ltd.

RM.711, Tower 2, Cheung Sha Wan Plaza, 833 Cheung Sha Wan Rd., Kowloon, Hong Kong
Tel: [phone]
Fax: [phone]

Copyright 1999 by HOL TEK SEMICONDUCTOR INC.

The information appearing in this Data Sheet is believed to be accurate at the time of publication. However, Holtek
assumes no responsibility arisingfrom 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 http://www.holtek.com.tw.

6 June 28, 1999

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