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Code is running outside of the CSM protected area, and the CSM is locked. Can it branch to code within the CSM protected memory?

April 26, 2017area branch code CSM locked memory outside protected running

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Code is running outside of the CSM protected area, and the CSM is locked. Can it branch to code within the CSM protected memory?

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No, you can branch into the secured memory and begin execution without any additional setup. Note: this is different then trying to read values out of the flash through data or program space – this will be blocked. For example, code running in M0 SRAM (unsecure) can branch to code within the Flash even if the CSM is locked. Code running out of M0 SRAM will not be able to read any value out of Flash if the CSM is locked.