IZ7007
1
Circuit for electron pedometer - ergmeter
Short characteristics
Functions performed:
- 5 functions for counting time and calendar with indication of hours, minutes, seconds,
month, date ,
- count the quantity of steps by means of evaluation and counting pulses from external
sensor ;
- count and indication of steps, calories, kilometers , miles during current day and night
(mode DAILY STEPS COUNTER);
- summing up at changing 24 hours, steps , calories, kilometers , miles with values
stored previous ( mode TOTAL STEPS COUNTER).
Features:
- imbed in chip element of quartz generator with operating frequency of 32768 Hz,
capacity, resistor, and voltage doubler;
- operation from one battery with the voltage of 1.5V, low consumption power;
- availability of circuits of contacts bracing suppression on buttons inputs;
- frequency of registered pulses from external sensor at counting steps is no more than
6Hz at duration of time between the end of previous and beginning of counted pulse no
less than 100 ms;
- conversion of quantity of steps into calories , kilometres and miles according to the
following ratios:
(10 steps = 0.24 calorie
= 0.0073 klm
= 0.0045 mile ;
1000 steps = 24 calorie
= 0.73 klm
= 0.456 mile );
- indication of distance in miles and kilometers starting from 0.001, calories, starting
from 0.1.
Operating temperatures range
operating temperatures range from -0 to +70
.
IZ7007
2
able 1 - Limiting and extreme modes
Extreme mode
Limiting mode
Symbol in
letters
Name of parameter, mode , unit
of measurement
min
max
min
max
U
CC1
Primary supply voltage from the
source of voltage, V
1,2 1,8 -0,3 2,0
U
CC2
Secondary supply voltage, V
2U
CC1
-0,3 2U
CC1
-0,3 4,0
U
IH
Input voltage of high level, V
U
CC1
-0,3 U
CC1
-0,3
U
CC1
+0,3
U
IL
Input voltage of low level, V
Uss
Uss+0,3
-0,3
U
CC1
+0,3
ble 2 - Electric parameters
(mb = 25
)
Standard
Name of the parameter
in letters
min
max
mode of
measurement
unit of
measurement
Consumption current in primary supply
voltage chain from voltage source
I
CC1
- 0.6
U
CC1
=1.8 V
Consumption current in secondary supply
voltage chain
I
CC2
- 1.2
U
CC1
=1.8 V
dynamic consumption current
I
CCO
- 3.0
without load
U
CC1
=1.65 V
Input current of low level on
inputs S, M, D, COUNT
I
IL
- 5
U
CC1
=1.65 V
U
IL
=0.3 V
-
8
U
CC1
=1.8 V
U
IL
=0.3 V
Voltage of quartz generator start
U
OSC
- 1.45 t
5
V
voltage of quartz generator break-down
U
OSP
- 1.2
-
V
Figure1 - Format LCD
ble 3 - LCD segments State
F
G
A
B
E
D
C
P
AM
TODAY
TOTAL
ST
CALLS
KM
MILIS
1
2
3
4
5
6
COL
P3
P4
P5
P6
IZ7007
5
Figure 4 - Control algorithm and display of date
*) The seconds will be reset to 00 and 1 will be added
to minutes if the current seconds is between 30 and 59
**) Current data reset with adding it to total data
***) Reset
D
*)
S
S
S1
S1
D
D
D
D
M
S
M
4
D
TOTAL DATA
D
DATA OF CURRENT DAY
S
**)
M
1 2 3 4 5 6 7
CALLS
TODAY
1 2 3 4 5 6 7
TODAY
D
1 2 3 4 5 6 7
TODAY
D
D
KM
MILIS
D
S
**)
1 2 3 4 5 6 7
ST
TOTAL
1 2 3 4 5 6 7
CALLS
1 2 3 4 5 6 7
D
1 2 3 4 5 6 7
D
D
KM
MILIS
TOTAL
TOTAL
TOTAL
1 2 3 4 5 6 7
1 2 3 4 5 6 7
ST
TODAY
1 2 3 4 5 6 7
AM
1 2 3 4 5 6 7
AM
1 2 3 4 5 6 7
AM
1 2 3 4 5 6 7
AM
S
1 2 3 4 5 6 7
1 2 3 4 5 6 7
S
D
S
D
D
D
D
.
COUNT
T > 166mc
t> 100mc
Figure 5 - Timing diagram
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