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This
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is
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perhaps
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one
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of
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the
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most
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frequently
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asked
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questions
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about
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uClinux
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on
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Cortex-M.
First thing to say is that external RAM is a must for uClinux. However small a Linux configuration, it still requires at least several MBytes of RAM to run from. All Cortex-M devices Emcraft is aware of limit they internal SRAM to hundreds KBytes at best. There is no way uClinux can be run from a single-chip Cortex-M design, as of this writing.
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