SPRUJ79 November 2024 F29H850TU , F29H859TU-Q1
Before program and erase operations can be performed, the currently running application must grab the Flash semaphore. The Flash semaphore is managed by the Safety and Security Unit, and can be grabbed by writing to the FLSEMREQ SSU register. For more information on how to use the Flash semaphore, see Section 10.9.
The device security architecture also provides mechanisms to protect Flash banks and sectors from program and erase operations for safety and security. For more on these protection mechanisms, see Section 10.9.1.