LSM9DS DEN_A/G

[Mich1]

Posted on March 29, 2017 at 18:10

Hello,

How could I enable the DEN_A/G signal?

I succeeded to enable the DRDY_M or INT1_A/G signal but I have nothing on this DEN_A/G.

Do you have any suggestion?

Best regards

Mich

[Miroslav BATEK]

Posted on March 29, 2017 at 18:38

Using DEN_A/G pin is possible to perform an external trigger synchronization/stamping of gyroscope data.

For details please check this 

https://community.st.com/0D50X00009XkhX7SAJ

 

[Mich1]

Posted on March 30, 2017 at 08:29

I have been confused by the function name: Accelerometer and gyroscope data enable.

But as already indicated by Petr S, the answer of your link is wrong: CTRL_REG2 (11h) do not have bit 5 to 7 available!

So could you indicate how to use this DEN_A/G pin please?

I have a 2nd question: when both the accelerometer and gyroscope are activated by ODR_G, can I use only the INT_DRDY_G (Gyroscope data ready on INT 1_A/G pin. Default value: 0 (0: disabled; 1: enabled)) signal to consider that both accelerometer and gyroscope data are enable?

[Mich1]

Posted on March 30, 2017 at 10:47

on your web site the datasheet is: DocID025715 Rev 3

In this datasheet:

[Miroslav BATEK]

Posted on March 30, 2017 at 10:36

The answer from Petr S is correct. The register CTRL_REG2 have bits 5-7 available. The datasheet says they should be set to 0, but if you want to use the DEN_A/G functionality you have to configure these bits. If you don't need 

external trigger synchronization/stamping of gyroscope data you can leave this pin unconnected, it wont have influence on the sensor performance.

You can select which data ready signal will be linked to INT1_A/G pin in INT1_CTRL (0Ch) register, so you can use only data ready from gyroscope.