i.MX Processorsのトピックi.MX6 GPIO Slew Rate Configuration

i.MX6 GPIO Slew Rate Configuration

menghuaho — Wed, 18 May 2016 09:37:05 GMT

Hi,

Need help from fellow freescale community members with regards configuration of imx6D/Q GPIO output slew rate.

We are attempting to configure iMX6D/Q GPIO (GPIO6_IO08) to have a slew rate (green lines) to the region of around 600us. Currently, we are only able to configure to 4-5us slew rate (10%-90%, rising edge), using DSE via pad configuration.

Would it be possible to adjust PUE, PKE and pull-up resistance (100K) to achieve that too?

Appreciate if there would be some additional info/source examples for this.

Thanks for your help.

Re: i.MX6 GPIO Slew Rate Configuration

igorpadykov — Wed, 18 May 2016 11:30:21 GMT

Hi Meng

one can try with settings :

SRE=0, SPEED=0, ODE=1 Output is Open Drain,

PKE=0, PUE=1, PUS=10 - 100K Ohm Pull Up

Also one can try to add capacitor for slope tweaking.

Best regards

igor

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Re: i.MX6 GPIO Slew Rate Configuration

menghuaho — Thu, 19 May 2016 06:08:37 GMT

Hi Igor,

Thanks and appreciate your advise on this matter.

This worked for me instead.

========================================

SRE=0, SPEED=0, ODE=1 Output is Open Drain,

PKE=1, PUE=1, PUS=10 - 100K Ohm Pull Up

============================================

Thanks again.