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TMS320F28375D: DMA operation with external mulitplexer

Lenio Cacula
Genius 17140 points

Part Number: TMS320F28375D

This application uses an external multiplexer for analog signals going into the F28375D. Is there an ingenious way of setting up the DMA and GPIO's to switch the channels of the external multiplexer in a sequence without waking up the CPU? 

Thank you!

  • 0
    TI__Guru 55700 points
    Lenio,

    Which low power mode are you talking about? DMA is powered only in operational / IDLE mode and gated off in other low power modes.

    If you are working in IDLE mode, you can have one of the CPU Timers to trigger DMA to write to GPIO register to control the external multiplier.

    Regards,
    Manoj