ST STM32L4 Series User Manual

SM CODE FLASH_SM_0
The use of internal cyclic redundancy check (CRC) module is recommended. In principle
direct memory access (DMA) feature for data transfer can be used.
Unused Flash memory sections can be excluded from testing.
Table 24. FLASH_SM_1
SM CODE FLASH_SM_1
Description Control flow monitoring in Application software
Ownership End user
Detailed implementation
Permanent and transient faults affecting the system Flash memory, memory cells and address
decoder, can interfere with the access operation by the CPU, leading to wrong data or
instruction fetches.
Such failures can be detected by control flow monitoring techniques implemented in
Application software loaded from Flash memory.
For more details on the implementation, refer to description CPU_SM_1.
Error reporting Depends on implementation
Fault detection time Depends on implementation. Higher value is fixed by watchdog timeout interval.
Addressed fault model Permanent/transient
Dependency on Device configuration None
Initialization Depends on implementation
Periodicity Continuous
Test for the diagnostic Not applicable
Multiple-fault protection CPU_SM_0: Periodic core self-test software
Recommendations and known limitations CPU_SM_1 correct implementation supersedes this requirement.
Table 25. FLASH_SM_2
SM CODE FLASH_SM_2
Description
Arm
®
Cortex
®
-M4 HardFault exceptions
Ownership ST
Detailed implementation
Hardware random faults (both permanent and transient) affecting system Flash memory
(memory cells, address decoder) can lead to wrong instruction codes fetches, and eventually
to the intervention of the Arm
®
Cortex
®
-M4 HardFault exceptions. Refer to CPU_SM_3 for
detailed description.
Error reporting Refer to CPU_SM_3
Fault detection time Refer to CPU_SM_3
Addressed fault model Permanent/transient
Dependency on Device configuration None
Initialization Refer to CPU_SM_3
Periodicity Continuous
Test for the diagnostic Refer to CPU_SM_3
Multiple-fault protection Refer to CPU_SM_3
Recommendations and known limitations Refer to CPU_SM_3
UM2305
Hardware and software diagnostics
UM2305 - Rev 10
page 22/110

ST STM32L4 Series Specifications

General

Brand	ST
Model	STM32L4 Series
Category	Microcontrollers
Language	English