LSM9DS0传感器未给出确认

你好，

我们正在开发9轴传感器：LSM9DS0，它通过I2C接口与MCU连接。请查看随附的电路图供您参考。
此外，我们已经使用评估板（STEVAL-MKI154V1）进行了检查，然后它可以与我们定制的板载控制器一起工作，但是我们的板载LSM9DS0传感器没有给出确认。我们注意到C1_XM＆amp; SETC_XM，SETP_XM。这里我们使用下面的从I2C地址：
加速度计地址 - 0x3C
陀螺仪地址 - 0xD4




我们已经完成了以下方法，但没有得到任何确认。
1.将拉电阻从10K改为4.7K / 2.2K
2.断开VDD_IO与VDD的连接
3.我们观察到I2C波形（I2C地址）正常，但确认除外。


请给我们澄清一下VDD_IO引脚是否该引脚用作NC（不连接）或连接到VDD？
在这种情况下任何帮助将不胜感激。


谢谢
Bhavin



以下为原文




Hello,

We are working on 9 Axis Sensor : LSM9DS0 which is interfaced with MCU over I2C interface. Please find the attached circuit diagram for your reference.  
Also, We have checked using evaluation board (STEVAL-MKI154V1) then it works fine with our customized on board controller, but our on board LSM9DS0 sensor not given acknowledgment. We have noticed not getting voltage on C1_XM & SETC_XM , SETP_XM.  Here we are using the below slave I2C address:
Accelerometer address - 0x3C
Gyroscope address - 0xD4




We have done below approaches but not getting any acknowledgement.
1. Change pull resistor from 10K to 4.7K / 2.2K
2. Remove connection of VDD_IO from VDD
3. We have observed I2C waveform (I2C Address) is OK except acknowledgement.


please give us clarification for VDD_IO pin is this pin is used as NC(not connect) or connected to VDD?
Any help in this case will be appreciated.


Thank You
Bhavin