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MSP430 I2C slave Speed.

Prad1
Genius 3825 points

Other Parts Discussed in Thread: MSP430G2553

Hi,

As written in the user guides, the MSP430 I2C supports Standard-mode, Fast-mode.
But our customer is connecting Stellaris(which supports Fast-mode Plus) to the MSP430G2553 through I2C.

If MSP430 is the slave what could be the maximum speed that is allowed for I2C comm in practical.
Actually it seems they are able to communicate above 500KHz speed.
Will it be ok to use MSP430 slave I2C at that speed?

Regards.
Prad

  • 0
    Guru 46710 points

    You shall refer to MSP430G2553 datasheet, I2C mode timing. When you finished reading and still have questions - you are welcome back.

  • 0
    Guru 227245 points

    The maximum speed is what works. Sounds trivial, bu tis th eonly answer you could get. Teh MSp is specified for fas tmode (400kHz max.). If you go beyond, you do it on your own risk. it may work or not and even if it works with one MSP it might stop working with another.

    That's why there are specifications in the datasheet, telling what is guaranteed to work.

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