SPRUIV7C May 2022 – November 2025 AM620-Q1 , AM623 , AM625 , AM625-Q1 , AM625SIP
The MCU_M4FSS is an Arm Cortex-M4F based subsystem that can run safety processing or be used as a general purpose MCU. During the boot process, the MCU_M4FSS will be configured by an initial software running on a different core. Following configuration, software will release the safety processor (M4F) out of reset, and at this point safety processor code or general purpose code can start execution.
The Cortex-M4F processor is a Cortex-M4 processor that includes the optional floating point unit (FPU) extension.
The MCU_M4FSS is designed to meet SIL-2 safety requirements. Safety is enabled for all major subsystem components that include ECC / EDC features:
There is one MCU_M4FSS in the device. Table 7-26 shows MCU_M4FSS allocation across device domains.
| Module Instance | Domain | |
|---|---|---|
| MCU | MAIN | |
| MCU_M4FSS0 | ✓ | – |