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PGA460: 读取温度数字异常

Part Number: PGA460

问题描述:通过指令6读取温度时,返回的值异常。

 

 

读取温度值步骤如下:

1.发送测量指令:0x55 0x04 0x00 0xFB;

2.延时100us后,

3.发送读取指令:0x55 0x06 0xF9;

4.PGA460返回数据:0x40 0x75 0x18 0x32;

 

此时读取的字节1的值为:0x75,换算后为117°C。 实际体感芯片温度远远低于117°C明显判读读出的值不正确。通过多次在不同情况下的测试,读出的值均大于100°C。供电电流正常,排除大电流引起发热的情况。

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  • Problem Description: The value returned when reading the temperature through command 6 is abnormal.Steps to read the temperature value are as follows:

    1. Send the measurement command: 0x555 0x04 0x00 0xFB;

    2. After a delay of 100us,

    3. Send the read command: 0x555 0x06 0xF9;

    4. The PGA460 returns data: 0x40 0x75 0x18 0x32;

    At this time, the value of byte 1 is 0x75, which is converted to 117°C. The actual temperature of the sensor chip is much lower than 117°C, indicating that the read value is clearly incorrect. After multiple tests under different conditions, the read values are all greater than 100°C. The power supply current is normal, excluding the possibility of heat generation due to high current.

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