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msp430 g2553 temperature sensor analog out?

SHIVENDRA MISHRA
Prodigy 50 points

Hello!

I was trying to interface G2553 with another guy. But the problem is another guy is completely packed and he doesn't have any space through which I can talk, except an ADC input channel.

So, I was wondering If there is a way I can get the temperature sensor analog out on any of those pins of g2553? And wire it to analog channel of another guy?

Thanks in advance!

  • 0
    Guru 303820 points
    The internal temperature sensor is directly connected to one of the inputs of the ADC, and to nothing else.

    You have to take the digital output of your own ADC, and transfer it to the other MCU. If the only available input is an ADC, you could use a filtered PWM signal. But why can't that pin be used as a GPIO?
  • 0
    Guru 12050 points

    Making your own DAC could be done if the msp430 still have a TA0.1 or TA0.2 TA1.1 or TA1.2 pin available.
    resistor and a cap to create a filter.

    But surely the other "guy" must have the option to set the ADC pin as general GPIO?

    If so just create a single-wire-protocol to send 10bit data.

    is there no i2c bus you can tap in to?

  • 0
    Guru 46710 points

    To be honest - to use msp430 as _analog_ temperature sensor is total waste, especially knowing that it's built-in temperature sensor is not that good at all. Note that absolute precision of it is not even specified. Why don't you simply use temperature sensor IC with analog output? TI have plenty to choose from

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