Architectures and Processors forum Why use Cortex-M7 dual-redundant core?

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Why use Cortex-M7 dual-redundant core?

Louis_Gao_NXP over 7 years ago

Cortex-M7 has an parameter named "LOCKSTEP" which specifies whether the implementation is a dual-redundant core and uses lock-step.

My question is: why do I need to implement the dual-redundant core? What is its advantage and what is its cost?

+1 Joseph Yiu over 7 years ago

It is related to functional safety requirements in certain types of microcontrollers/SoC for automotives and industrial applications. This allows logic failures to be detected, which enables safety features to kick in and start remedy actions.
The link below is a paper published in Embedded World 2015, which covered this topic:
community.arm.com/.../embedded-world-2015---design-of-soc-for-high-reliability-systems-with-embedded-processors

regards,
Joseph
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