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AM2320 Folha de dados(PDF) 12 Page - List of Unclassifed Manufacturers |
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AM2320 Folha de dados(HTML) 12 Page - List of Unclassifed Manufacturers |
12 / 27 page accordance with the function codes and requirements; then the results (data) is sent back to the host. The information returned includes the function code, and after execution of the data CRC code (the user may read the CRC, can be sent directly to a stop condition). ◎Communication slave address AM2320 sensors each address are the same, and is 0xB8. So on the same bus can only hang the AM2320 sensors, sensor signal only after receiving the start and with itself will respond to the same address. ◎Communication I 2 C function code Function code is the first byte of each communication message frame transmission. I 2 C-Mod Bus communication rules, define the function code is 1-127. As host requests sent by function code tells the slave what action should be performed. As a slave response, the slave returns the function code sent from the host to the function code, as it indicates that the response from the host machine and have been related operations. I 2 C-Mod Bus part of the function codes are listed in Table 7. Table 7:C Mod Bus part of the function code Function Code Definitions Operation (binary) 0x03 Reading Register Data Read one or more data registers 0x10 Write Multiple Registers Multiple sets of binary data to write multiple registers ◎C communication data area The data area includes required by the sensor returns what information or what action to perform. This information may be data (such as: temperature, humidity, the sensor device information, the user writes data, etc.), the reference address. For example, function code 03 tells the host through the register value returned by the sensor (including the start address of the register to be read and the read length register), the returned data comprises data length and the content of the register data register. Sensor uses a custom I 2 C -Mod bus communication protocol used by the master communication command (function code 03), which could be read its data register, the data register table in Table 8. Sensor data register stores the temperature and humidity values and the corresponding sensor device information and other related signals; each data register is a single byte (8 bits) of binary data; once read data up to 10 sensor registers more than read length, the sensor will return the corresponding error code. The error code information, see Schedule 1. Table 8: AM2320 Data Register Table Register information Address Register information Address Register information Address Register information Address High humidity 0x00 Model High 0x08 Users register a high 0x10 Retention 0x18 Low humidity 0x01 Model Low 0x09 Users register a low 0x11 Retention 0x19 High temperature 0x02 The version number 0x0A Users register 2 high 0x12 Retention 0x1A Low temperature 0x03 Device ID (24-31) Bit 0x0B Users register 2 low 0x13 Retention 0x1B Retention 0x04 Device ID (24-31) Bit 0x0C Retention 0x14 Retention 0x1C - 11 - |
Nº de peça semelhante - AM2320 |
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Descrição semelhante - AM2320 |
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