LSM9DS1上的DEN_A/G引脚实际上做了什么？

大家好，
 
 
DEN功能：
 
可以使用三种不同的模式执行外部触发同步/标记：电平，脉冲或边缘敏感触发。
 
1）DEN电平敏感（LVLen位配置）：
执行标记动作：陀螺仪数据输出的最低有效位（LSB）等于DEN引脚值，用于将数据与外部信号相关联。
 
2）DEN脉冲敏感（IMPen位配置）：

如前所述，但可以使用短脉冲（也是以下为原文







Hello all,


DEN functionality:

It is possible to perform an external trigger synchronization/stamp using three different modes: level, impulse or edge sensitive trigger.  

1) DEN Level Sensitive (LVLen bit configuration):
It is performed a stamp action: the Least significant bit (LSB) of the Gyroscope data output is equal to DEN pin value, it is used to correlate data with an external signal.

2) DEN Impulse Sensitive (IMPen bit configuration):
As the previous, but it is possible to stamp (Gyroscope LSB) using short impulses (also < 1/ODR)

3) DEN Edge Sensitive (EXTRen bit configuration):
The stamp action is not performed, but it is used to reduce the ODR to DEN frequency,  
and at the same time, it is possible to fill in FIFO and Output Register only the sample acquired after “DEN� rising edge.


DEN Register Configuration address 11h, 3 MSB of 11h Register are DEN Configurations Table
  



  
Edge_Sens_EN
Level_Sens_EN
Level2_Sens_EN
DEN FUNCTION
  
1
0
0
Edge Sensitive
  
0
1
0
Level Sensitive
  
0
1
1
Pulse Sensitive


Best regards,

Petr