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AM2320 Folha de dados(PDF) 25 Page - List of Unclassifed Manufacturers

Nome de Peças AM2320
Descrição Electrónicos  Digital Temperature and Humidity Sensor
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Fabricante Electrônico  ETC2 [List of Unclassifed Manufacturers]
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AM2320 Folha de dados(HTML) 25 Page - List of Unclassifed Manufacturers

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Figure 23: Single-bus timing diagram decomposition
Data bus SDA AM2320 output 40-bit of data , the continued output low 50 microseconds
after the entry into the state, due to the pull-up resistor attendant goes high. Meanwhile AM2320
retest internal temperature and humidity data, and record data, test recording ends, the micro
controller automatically goes to sleep. Only after receipt of the start signal micro controller host,
only to re-awaken the sensor, enter the working state.
8.3.5 Peripheral read flowchart
AM2320 sensor reads a single bus flowchart diagram shown in Figure 24, we also provide
sample code reads C51, need to download the client, please visit our website (www.aosong.com)
associated download, this manual does not provide code description.
On the sensor
initialization
Reading device
sends a start signal
Release the bus waiting for the sensor
response signal
Continuous reading
device to read 40 data
Data validation
Fixed acquisition time to?
Update temperature
and humidity values
No response signal
There are a
response signal
Parity error
Correct parity
Wait (fixed
acquisition cycle)
Yes
No
Figure 24: Single-bus read flowchart
9. Application Information
1. Work and storage conditions
The proposed scope of work may result in up to 3% RH temporary drift of the signal. Return
to normal working conditions, the sensor calibration status will slowly recover. To speed up the
recovery process can be found in "recovery process." The use of the product will accelerate the aging
- 24 -


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