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MSP432P401R: Timer A3 Captouch Configuration Fails

Barnesy3113
Prodigy 130 points

Part Number: MSP432P401R

I have the RGC package of the MSP432P401R.  I have successfully used captouch using Timer A2, but when I change the counting timer to Timer A3 and I view the Timer_A3 registers nothing is being configured, the register is completely zeroed out even though I just wrote to the TACTL register.  One of my co-workers said that he remembers reading somewhere that Timer_A3 is not present on the RGC package.  I have read through the Datasheet, and even the TRM, looking for some statement to confirm this with no luck.  Can somebody please confirm for me whether or not the Timer A3 module is present on the MSP432P401RIRGC package?  If it's not, can you please direct me to the statement in documentation for this?  Thank you!

  • +1
    Guru 92251 points

    The following from the datasheet shows the TA3 signals are only on the pins for the PZ package:

    And the following shows there are only 3 instances of Timer_A on the ZXH and RGC packages:

  • 0 in reply to Chester Gillon
    Prodigy 130 points

    I had seen the pin access didn't exist for Timer A3 on the RGC, but that doesn't necessarily exclude the module from existing.  I had not seen this other chart you presented, and you are correct, it clearly shows 3 timers, while the PZ package shows 4.  Since I know Timers A0/1/2 exist I am going to take that to mean that Timer A3 isn't on the RGC package in any way, though I do wish TI were more explicit about this statement in their documentation.  Thank you Chester!