F15353G View Datasheet(PDF) - Feature Integration Technology Inc.
Part Name
Description
Manufacturer
F15353G Datasheet PDF : 38 Pages
| |||
Fintek
MSB
A2WE 0
Feature Integration Technology Inc.
F15353
INT1 register_2
LSB
0
0
0
W4
W2
W1
A2HE AM/PM H20 H10 H8
H4
H2
H1
A2mE m40 m20 m10 m8
m4
m2
m1
In INT1 register_1 or register_2, A1WE/A2WE, A1HE/A2HE, and A1mE/A1mE are respectively in MSB of the
day of week data, hour data, and minute data by setting “1”
.
6.7 Clock Adjustment Function
A clock adjustment function is provided to logically perform slow/fast adjustment of the 32KHz clock and correct a
slow/fast clock with high accuracy. Use the clock adjustment register to set this function. Write “00h” to disable
the function. The clock adjustment register value is calculated by the following expression.
6.7.1 Current Frequency > Target Frequency
Re gister _ value*1 =
⎡Current _ oscillatoin _ frequency
⎤
128
−
Integral
_
⎢
value⎢⎢
acutal _
Current
measurement _ value*2
_ oscillation _ frequency
−
T
arg et _ oscillation _ frquency*3
Minimum _ resolution*4
⎥
⎥
⎥
⎢
⎥
⎢⎣ actual _ measurement _ value*2
⎥⎦
Caution: The figure range which can be corrected is that the calculated value is from 0 to 64.
Note:
*1. The register value is the value set to the clock adjustment register. Set the binary value of this value to
the clock adjustment register.
*2. This is the measurement value of the signal that is output to the INT1# or INT2# pin when the 1 Hz clock
output setting is:
32kE = 0, INT1ME = 0, INT1FE = 1, INT1# register_1 is 01h (for the INT1# pin)
INT2ME = 0, INT2FE = 1, INT1# register_2 is 01h (for the INT2 pin)
*3. This is the frequency to be adjusted by using the clock adjustment function.
*4. For the minimum resolution, 3.052ppm or 1.017ppm can be set using bit7 of the clock adjustment
register. When bit7 is 0, 3.052ppm is set and logical slow/fast adjustment is performed every 20
seconds. When bit7 is 1, 1.017pm is set and logical slow/fast adjustment is performed every 60
19
V0.12P
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