HT1350 查看數據表（PDF） - Holtek Semiconductor
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HT1350 Datasheet PDF : 6 Pages
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HT1350
Absolute Maximum Ratings
Supply Voltage.................................-0.3V to 5V
Input Voltage .................VSS-0.3V to VDD+0.3V
Storage Temperature.................-50°C to 125°C
Operating Temperature ..................0°C to 70°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
Symbol
Parameter
VDD
IDD
ISTB
VIL
VIH
fOSC
Operating Voltage
Operating Current
Standby Current
Input Low Voltage
Input High Voltage
System Frequency
Test Conditions
VDD
¾
Conditions
¾
1.5V
1.5V
No load,
fOSC=32kHz
¾
1.5V
¾
1.5V
¾
1.5V
¾
Ta=25°C
Min. Typ. Max. Unit
1.3 1.5 1.7
V
¾
1.5
3
mA
¾
0.5
1
mA
¾
¾ 0.2VDD V
0.8VDD ¾
¾
V
¾
32
¾ kHz
Functional Description
The HT1350 is a step counter IC. It is used to au-
tomatically count the step number taken by a
runner and to display the whole course (kilome-
ter/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
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