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TMS570LS0432: problems with TMS570LS0432 display adc demo

Part Number: TMS570LS0432

When you run this demo it never completes conversion. Following the code and instructions in it, it starts conversion and blocks. Any thoughts on how to get the adc's to actually return a reading in this demo?

  • OK I got it to complete conversion. So I am past tht. But can anyone tell me AdRefLO and AdRefHI so I can scale the counts into volts. Weird the manual mentions those limits a 100 times but does not actually give a value for them.
  • Hello Nolan,

    In most of our devices, there are separate external pins available so the ref lo and ref hi inputs can be defined by the user as long as they are maintained within the datasheet guidelines. On the LS0432 as well as the other lower end 100pin packaged Hercules devices, we chose to tie the reference and supply pins together in order to provide more functional pins on the device. This means that on this device ADREFLO is fixed to VSSAD (ground) and ADREFHI is fixed to VCCAD (3.3V ? dependent on power supply on the launchpad - schematics are available on the launchpad wiki).