2.3.1. Binary compatibility with other Cortex processors

The processor is binary compatible with the instruction sets and features implemented in other Cortex-M profile processors. You cannot move software from the Cortex-M7 processor to:

Code designed for the Cortex-M3 and Cortex-M4 processors is compatible with the Cortex-M7 processor as long as it does not rely on bit-banding.

To ensure a smooth transition when migrating software to the Cortex-M7 processor, Arm recommends that code designed to operate on the Cortex-M0, M0+, M3, and M4 processors obey the following rules and that you configure the Configuration and Control Register (CCR) appropriately:

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