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Thread: IIC Pin-Mapping XMC4k without bidirectional pins

  1. #1
    New Member New Member alfrieck is on a distinguished road alfrieck's Avatar
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    IIC Pin-Mapping XMC4k without bidirectional pins

    We want to implement IIC on an existing design for which we have only specific pins available.
    I am following the Datasheet Chapter 15.5.1.1 Signal Description ff.



    We have the pins available as outlined in the picture and we want to implement a single master I2C. We do not allow clock stretching by a slave.

    Click image for larger version

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    Following the specification ....
    the pin assignment of module IIC A shows separate pins for the input and output signals for SDA and SCL.
    This assignment can be used if the application does not provide pins having DOUT0 and a DX0 stage input for the same pin
    (similar for SCLKOUT and DX1).

    ....
    I should be able to set-up something like this:
    SDA-IN:
    USIC1_CH1.DX0D I P0.0
    SDA-OUT
    USIC1_CH1.DOUT0 O P0.1

    SCL-OUT
    USIC1_CH1.SCLKOUT O P1.8
    SCL-IN
    USIC1_CH1.DX1G I USIC1_CH1.SCLKOUT

    I cannot select this pinning in DAVE.
    When I generate some I2CMaster-code with Dave and another pinning which lines to I have to change to get to the pinning as outlined above?

    Thx
    Last edited by alfrieck; Jan 7th, 2019 at 11:17 PM. Reason: mistake

  2. #2

    Infineon Employee
    Infineon Employee
    jferreira will become famous soon enough
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    575
    Hi,

    The I2C_MASTER APP does not allow this. You will need to use the I2C_CONFIG APP.
    Click image for larger version

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    Regards,
    Jesus
    The views expressed here are my personal opinions, have not been reviewed or authorized by Infineon and do not necessarily represent the views of Infineon.

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