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Does the Cortex-M3 and Cortex-M4 processor distinguish between Cold and Warm reset?

Article ID: 103489878

Published date: 13 Feb 2018

Last updated: -

Applies to: Cortex-M3, Cortex-M4

Question

Does the Cortex-M3 and Cortex-M4 processor distinguish between Cold and Warm reset?

Answer

No, the Cortex-M3 and Cortex-M4 processor cannot distinguish between Cold and Warm reset.

The chip designer needs to provide such functionality outside of the processor if required. For example, by providing a memory-mapped register bit which is cleared on Cold reset (PORESETn) but not on Warm reset (SYSRESETn), and have the software set this bit during the boot sequence.

Related information

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