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Set SAM3 frequency

Mohammad Emami

Hi

i'm working with SAM3 microcontroller with 12MHz external crystal and set the multiplier and divider to have 64MHz for Master Clock then i see mistake when code is running

it's necessary noted that boundary condition for SAM3S is 64MHz for master clock
does it have relation to this parameter and should this condition satisfy at all cost

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  • 0 in reply to Mohammad Emami

    Unless there is an errata, then the frequency should be supported for the full temperature range and all other conditions.

    The basic exception is that a processor might support a rather wide voltage span. And then there might be multiple maximum frequencies specified in the datasheet depending on which voltage range it is operating in.

    But the operating frequency, number of rewrites of the flash memory is basically worst-case guarantees where the devices are expected to have enough safety margins.

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  • 0 in reply to Mohammad Emami

    Unless there is an errata, then the frequency should be supported for the full temperature range and all other conditions.

    The basic exception is that a processor might support a rather wide voltage span. And then there might be multiple maximum frequencies specified in the datasheet depending on which voltage range it is operating in.

    But the operating frequency, number of rewrites of the flash memory is basically worst-case guarantees where the devices are expected to have enough safety margins.

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