LIS2DH错误的I2C地址

大家好，
今天我使用LIS2DH加速度计（I2C模式）开始了一个新项目。以前我已经非常成功地使用了LIS3DH，总是处于I2C模式。看到数据表，在基本功能方面，LIS2DH和LIS3DH实际上是同一个对象（LIS3DH只有3个额外的ADC通道......）：相同的寄存器，相同的设置和理论上相同的I2C地址，（当SA0 = 0时为0x18） ，当SA0 = 1时为0x19。因此，我希望能够轻松移植我的代码，因为，我再说一遍，理论上，LIS2DH和LIS3DH是同一个设备。
我不知道为什么，但使用0x18（我的SA0为0）LIS2DH不通信。

我疯了：我做了三次PCB的返工（我以为可能问题是板子）：没什么，什么也没有。所以我有这个想法：我检查了所有I2C的空间地址，从0x00到0x7F 。我没有得到任何回应，如前所述，在0x18但是，令人难以置信，我在0x29得到了回应。
嗯...非常奇怪，但是......好吧，我使用这个新地址更新了我的.c库...哇，LIS2DH有效！
但我仍有疑问：这怎么可能？
LIS2DH的数据表没有报告关于I2C地址的任何勘误...
任何想法？
问候，

Francesco注意：I2C总线与MS5803气压传感器共享，可正确使用其地址（0x77）



以下为原文




Hi all,
today I started a new project using the LIS2DH accelerometer (I2C mode). Previously I already used, very successfully, LIS3DH, always in I2C mode. Seeing the datasheets, in the basic functionatity, LIS2DH and LIS3DH are pratically the same object (the LIS3DH has just 3 extra ADC channels...): same registers, same setup and, theorically, same I2C Address, (0x18 when SA0 = 0, 0x19 when SA0 = 1). So, I was expect an easy porting of my code because, I repeat, theorically, LIS2DH and LIS3DH, are the same device.
I don't know why, but using 0x18 (my SA0 is 0) the LIS2DH do not comunicates.

I was going crazy: I do three times a rework of the pcb (I was thinking that maybe the problem was the board): nothing, nothing and nothing.So I had this idea: I checked all I2C's space address, from 0x00 to 0x7F. I got no response, as previously, at 0x18 but, incredible, I got a response at 0x29.
Mmmm...very strange but...Ok, I updated my .c library using this new address and...WOW, LIS2DH works!
But I still have a doubt: how is this possible??
The datasheet of LIS2DH no reports any errata about the I2C address...
Any idea?
Regards,

FrancescoNOTE: the I2C bus is shared whit a MS5803 barometric sensor, that correctly works with his address (0x77)