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MSP430FR2355: Using A10 and A11 inputs

Ryan Thompson
Prodigy 50 points
Part Number: MSP430FR2355


Hi,

I am not sure how to use these pins. A0-A9 have enable bits in the SYSCFG2 register but there doesn't seem to be anything like this for A10 and A11. Below is the configuration I have which is not working yet even though I have set it up similarly to how I have on other MSP430 models. Is there something special I need to do to use these pins? There is already a PCB made using these inputs so it would be much easier to figure them out instead of using other pins at this point.

  ADCCTL0 = 0x0210;

  ADCCTL1 = 0x0010;

  ADCCTL2 = 0x0020; 

  ADCMCTL0 = 0x003A;

  ADCIE = 0x0001;

  ADCCTL0 |= 0x02;

  ADCCTL0 |= 0x01;  

  • +1
    Guru 100715 points

    On the FR2355 the pin configuration for ADC is done using the PSEL bits [Ref data sheet (SLASEC4D) Table 6-67 for A10/A11].

    The User Guide has two different SYSCFG2 definitions: one for MCUs with a SAC (the FR2355 has an SAC) [Ref SLAU445I Table 1-26] and one for those without [Ref Table 1-31]. I constantly trip over this myself.

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