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TMS570 ADC pin memory address

Edward C1
Prodigy 10 points

Hello,

I am using the TMS5702125 chip and my question relates to where can I find the exact memory address of specific pins. Currently in the datasheet provided by TI, I found a range but nothing else. The pins I am using currently are 63 and 64.

Any information about this would be greatly appreciated. Let me know if you need more clarification.

  • 0
    TI__Guru 59540 points

    Hello Edward,

    The ADC pins on the device are not directly addressable as these are not digital ports. When an analog signal is provided on an ADC input, the voltage can be anywhere within the specified input range (ADREFLO to ADREFHI) which, if converted to a digital value would not provide any analog information. To get the ADC counts, you would need to read the results from the ADC results memory through either a direct CPU access to the ADC RAM or by using the FIFO pointer for the conversion results. The address ranges for the resutls memory can be found in table 4-21 of the datasheet (SPNS211a). The precise location of the result will be determined by the configuration of the results memory  for storage of EVT, G1 and G2 results and the sequence which the conversion has taken place since ADC will store the results in order that they were completed.

  • 0 in reply to Chuck Davenport
    TI__Guru 59540 points

    Hello Edward,

    Given the time since the last activity on this thread, I assume your question was answered and this thread will be closed. If you have time, please take a moment and verify the answer so that others can refer to the verified response. If there are any additional questions that come up, I would encourage you to utilize the E2E Forum again by opening a new thread.