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MSPM0G1505: Disabling VREF on MSPM0G1505SRGER

Purple Tentacle
Prodigy 10 points
Part Number: MSPM0G1505
Other Parts Discussed in Thread: MSPM0L1303, SYSCONFIG

Tool/software:

Hi
We need to upgrade from MSPM0L1303 to MSPM0G1505 (VQFN24), and we can't change the layout.
We are using 1.4V internal Vref, MSPM0L1303 don't need any external capacitor for VREF, but with MSPM0G1505 its not possible disable both VREF+ and VREF- in SysConfig, so we get conflict with PA23 or PA21.
Is it possible to disable both VREF+ and VREF-?

  • 0
    TI__Prodigy 625 points

    Hi,

    Since the G-series devices are able to output the internal VREF, the external capacitor is required. The connection between PA23 and VREF+ is not configurable, so you will not be able to enable the internal VREF without having it pin out to one or both of PA23 and PA21. 

    What requirements caused the swap from L1303 --> G1505? Maybe I can help find you an alternative MSPM0 to avoid needing to change the layout.

    Best,

    Sam