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    Does the BMM150 support I2C "general call address" ?

    Does the BMM150 support I2C "general call address" ?

    misterMark
    New Poster

    My application uses multiple BMM sensors that must be put into "Forced Mode" at the same time for simultaneous measurements.  For the BMM150s, I achieved this with SPI communication, by activating all of the sensors' Chip Select pins at the same time.  Unfortunately, the new BMM350 sensor no longer supports SPI, so it's back to I2C. 

    The I2C protocol mentions a General Call Address (reserved I2C address 0x00), that can be used to broadcast to all devices on the I2C bus at the same time.  However, not all I2C devices support this General Call feature.  Do the BMM150 or BMM350 sensors support the general call address feature?  Or are there any other tricks to syncronize sensor measurements

    3 REPLIES 3

    BSTRobin
    Community Moderator
    Community Moderator

    Hi misterMark,

    By setting BMM150 pin A5(CSB), C1(SDO) to low or high level, BMM150 can have four different I2C addresses.
    BMM150 does not support general call address.

    Thank you BSTRobin.

    Does the BMM350 support general call address?

    BSTRobin
    Community Moderator
    Community Moderator

    Hi misterMark,

    BMM150 does not support general call address.

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