Hello, I work on a product with LSM303AGR and STM300 module. The problem is : when the LSM303AGR goes to sleep, it works. After, I try to get EnOcean module to sleep, then the LSM303AGR consume 500µA. Any idea?

[Jérémy Da Silva]

The SPI works well. I can asleep the sensor but when I try to asleep the EnOcean module, I see that the sensor consume near 500µA. I have put two pull down on SDI/SDO and SCL and two pull up on the CS_ACC and CS_MAG.

[Miroslav BATEK]

Can you share your schematic?

I don't know STM300 module, but why do you put pull down on SDI/SDO and SCL pins?

[Jérémy Da Silva]

Because the STM300 module pins are floating when it is sleeping

[Jérémy Da Silva]

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[Jérémy Da Silva]

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[Jérémy Da Silva]

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[Miroslav BATEK]

OK, I see.

The problem could be caused by floating INT_MAG/DRDY pin. Please try to connect pull-up or pull-down on this pin.

[Jérémy Da Silva]

I cannot pull up or pull down because the pin is inaccessible.. see below

I have tried to connect a STM32L151CC with the LSM303AGR and I don't have the power consumption problem. I think this pin can be left floating without having any influence on the power consumption.

[Miroslav BATEK]

Other solution could be set the INT_MAG bit in CFG_REG_C_M to 1.

[Jérémy Da Silva]

Done but I have the same power consumption.

[Jérémy Da Silva]

Any other idea?