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MSPM0G3507: some questions about oscillator source

Jerry Kuo
Expert 4320 points
Part Number: MSPM0G3507

Tool/software:

Hi team,

Customer is developing M0G3507. Please help clarify below questions. Thank you.

1. refer to M0G3507 data sheet, it only describes about WDT. Does it provide IWDT (Independent Watchdog Timer)?

2. if above item is not, is there any register to monitor CPU oscillator/Freq.?

3. does M0G3507 provide any independent source of oscillator?

  • 0
    TI__Expert 8485 points

    Hi Jerry,


    1. M0G3507 do not have IWDT. Currently it only exist in M0Lx22x.
    2. I assume you are refer to MCLK monitor, it could refer to TRM 2.3.4.2, which could monitor whether there is a MCLK activity or not. And for any other clock monitor information, refer RTM 2.3.4 Clock Monitors. For frequency monitoring, there is a FCC module in G3507 to measure clock frequency. (TRM 2.3.5 Frequency Clock Counter (FCC))

    3. I'm not sure how you define "independent". Take IWDT in M0L2228 as an example, it has its own power domain and oscillator. From this aspect there is no independent oscillator in M0G3507. But by the way, the MCU clock could be output external as clock source of other devices. 

    Best Regards,
    Pengfei

  • 0 in reply to Pengfei Xie
    TI__Expert 4320 points

    Hi Pengfei,

    Thanks for your information. I will notify customer and see if they need more information. Thank you.

  • 0 in reply to Pengfei Xie
    TI__Expert 6220 points

    Hi Pengfei,

    Pengfei Xie said:
    1. M0G3507 do not have IWDT. Currently it only exist in M0Lx22x.

    Customer wants to know why the M0G TRM shows the IWDT function but G3507 doesn't have it?

    They are concerning how the device be safe if the clock frequency fails?

  • 0 in reply to Gary Liao
    TI__Expert 8485 points

    Hi Gary,

    Actually the MSPM0 G-Series 80MHz Microcontrollers TRM is write for all the MSPM0 G-series, so it is reasonable that it keeps some peripherals which may be supported in a future released device. And for the spec of a certain device part number, please refer to the datasheet. 

    Gary Liao said:
    They are concerning how the device be safe if the clock frequency fails?

    Do you mean clock monitoring?

    • You could refer TRM 2.3.4 Clock Monitors for clock monitoring function of MCLK, LFCLK and other clocks.
    • If you want to monitor clock frequency, a FCC function could be considered (TRM 2.3.5 Frequency Clock Counter (FCC) )

    Best Regards,

    Pengfei