F15353G 데이터 시트보기 (PDF) - Feature Integration Technology Inc.
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F15353G Datasheet PDF : 38 Pages
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Fintek
seconds.
Feature Integration Technology Inc.
F15353
Slow/fast Adjustment
Minimum Resolution
Correction Range
0
Every 20 seconds
3.052ppm
-195.3 to +195.3ppm
1
Every 60 seconds
1.017ppm
-65.1 to +64.1ppm
6.7.2 Current Oscillator Frequency < Target Frequency
Re gister _ value =
Integral
_
⎡
⎢
value⎢⎢
(T arg et _ oscillatoin _
(Current _ oscillation _
frequency)
frequency) ×
−
⎜⎜⎝⎛ Cacutruraeln_t
_ oscillator _
measurement
frequency
_ value
(Minimum _ resolution)
⎟⎟⎠⎞
⎤
⎥
⎥
⎥
⎢
⎥
⎢⎣
⎥⎦
Caution: The figure range which can be corrected is that the calculated value is from 0 to 62.
6.8 I2C Interface Function
The F15353 receives various commands via an I2C interface to read/write data.
6.8.1 Start Condition
The start condition is established at the point where the SDA line changes from “H” to “L” when the SCL line is “H”
level. All operations start with the start condition.
6.8.2 Stop Condition
The stop condition is established at the point where the SDA line changes from “L” to “H” when the SCL line is
“H” level. If the stop condition is received during a readout sequence, the read operation is discontinued and the
device enters the standby mode.
6.8.3 Data Transfer
Data transfer is performed by changing the SDA line during the period that the SCL line is “L”. If the SDA line
changes during the period a n d the SCL line is “H”, it is recognized as the start or stop condition.
6.8.4 Acknowledge
Data is transferred 8 bits in a row. Subsequently, in the 9th clock cycle period, the device on the system bus
that is receiving the data changes the SDA line to “L” and returns the acknowledge signal to acknowledge data
20
V0.12P
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