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52820 LPCOM problem

zero

Dear friend
I checked the data sheet of 52820 and I didn't see any LPCOMP peripherals. Check the data sheet of 52832, there are LPCOMP peripherals. Comparing COMP and LPCOMP, the registers are basically the same. It is also found that COMP supports low power mode.


Does 1.52820 support LPCOMP?
2.52820 If configured to low power mode, is the function consistent with LPCOMP?

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  • +1

    Hi,

    There is no LPCOMP peripheral in the nRF52820, only LPCOMP is available. 

    The two peripherals is not identical. COMP have more steps on the reference ladder (64 vs 15 for LPCOMP), and more choices of references (including 8 external references, internal reference voltages (1.2, 1.8, and 2.4V), LPCOMP can only use a fraction of VDD as reference, or 2 external reference). COMP also supports differential mode, where you can detect small variances between two input signals.

    LPCOMP can on the other hand be used to wake the chip from System OFF sleep mode, this is not possible with the COMP peripheral.

    Best regards,
    Jørgen

  • 0 in reply to Jørgen Holmefjord

    Hi Jørgen,

    Thanks for your help, but I still have the following questions:
    1. If COMP is set to low power mode, what is the difference with LPCOMP?
    2. Can COMP be set to low power to wake up the chip?
    3. COMP is set to low power mode. Is the power consumption of COMP consistent with that of LOPCOM?

    Best regards,
    Zero

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  • 0 in reply to Jørgen Holmefjord

    Hi Jørgen,

    Thanks for your help, but I still have the following questions:
    1. If COMP is set to low power mode, what is the difference with LPCOMP?
    2. Can COMP be set to low power to wake up the chip?
    3. COMP is set to low power mode. Is the power consumption of COMP consistent with that of LOPCOM?

    Best regards,
    Zero

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