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ADC interface module

Livio Franchin
Intellectual 835 points

Dear all,

I'm using both MIBADC1 and MIBADC2 modules on the TMX5701227APGEQQ1 microcontroller. 

I would like to know if it is possible to simultaneously start a group conversion on both the ADC modules through

an external trigger.

Could I utilize the AD1EVT pin for the above purpose? If not, which one would you suggest?

Thanks and regards

Livio

  • 0
    TI__Guru 59540 points

    Hello Livio,

    It is possible to set up the ADC with common hardware event triggers. In fact, AD1EVT can be configured for both ADCs. For MIBADC2, you will need to use the IOMM module/PINMMR registers to select the AD1EVT for MIBADC2 groub source select value 000. The AD1EVT trigger is selected by default for MIBADC1.

    You wll find more information about MIBADC1 and MIBADC2 trigger sources in the datasheet (SPNS192) for your device. Specifically, the trigger sources are discussed in section 5.4.2.

  • 0 in reply to Chuck Davenport
    TI__Mastermind 49120 points

    Hello,

    One minor correction: AD1EVT is not available as an option to trigger MibADC2 conversions. However, as Chuck indicated, there are several other options available to trigger both ADCs using the same external trigger. These are N2HET1 channels number 8, 10, 12 and 14, and GIOB port pins 0 and 1.

    There are also other signals that you can use to trigger conversions by generating the trigger events internally on RTI compare 0 interrupt, N2HET2 channels number 5 and 13 and N2HET1 channels number 11, 17 and 27.

    All trigger options are listed in the device datasheet (SPNS192).

    Regards, Sunil