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TM4C1294NCPDT: TM4C1294NCPDT

Adriano Santos1
Prodigy 50 points
Part Number: TM4C1294NCPDT

Good morning everyone, I'm using the tiva TM4C1294 ADC converter to simultaneously read 18 channels out of the 20 available, however when evaluating the sequencer step I realized that they only allow me to read 17 channels (SS0=8, SS1=4, SS2=4 and SS3=1), how do I read the 20 channels simultaneously, would this be possible?

  • 0
    TI__Guru*** 135355 points

    Hello Adriano,

    This will depend on your definition for 'simultaneous'. Even with ADC sequences, the sampling is done sequentially not simultaneously. This is a single core MCU so it can't grab 2 much less 18 channels of data at the exact same moment of time. But if you want to have it sequentially then it should be possible. There are two ADC modules you can use. From the datasheet:

    These two modules, ADC0 and ADC1, share the same 20 analog input channels. Each ADC module operates independently and can therefore execute different sample sequences, sample any of the analog input channels at any time, and generate different interrupts and triggers.

    So you can split the sequence setups across ADC0 and ADC1 to handle this requirement to the best of the ability of the TM4C which will be sequential sampling.

    Best Regards,

    Ralph Jacobi