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[问答]

LSM303DLHC响应DRDY的时间要求是什么?

LSM303DLHC DRDY引脚(引脚9)的详细行为未在数据表中详细说明。
我们观察到它会产生低电平有效脉冲,但数据表中并未详细说明。
响应DRDY的时间要求是什么?
在这个低脉冲期间,哪个寄存器准备好被读取?
是否应读取寄存器SR_REG_M中的DRDY位以验证新的测量值是否准备好,或者仅使用DRDY引脚?

以上来自于谷歌翻译


以下为原文




The detailed behaviour of the LSM303DLHC DRDY pin (pin 9) is not elaborated upon in the datasheet.
We have observed that it generates active low pulse but this is not detailed in the datasheet.
What are the timing requirements on responding to DRDY?
At which point during this low pulse are the registers ready to be read?
Should the DRDY bit in register SR_REG_M be read to verify that a new set of measurements is ready, or is just using the DRDY pin sufficient?

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曾玲娟

2018-9-12 10:05:23
DRDY信号在此传感器中的行为是非典型的。当新数据写入输出寄存器时,DRDY信号为低电平。因此,当DRDY信号为高电平时,应读取数据。我认为最好的解决方案是通过DRDY信号的上升沿同步读取输出数据。

以上来自于谷歌翻译


以下为原文




The behavior of the DRDY signal in this sensor is atypical. The DRDY signal is low when new data are written to the output registers. So the data should be read when the DRDY signal is high. I think the best solution is synchronize reading of output data by rising edge of the DRDY signal.
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