SM CODE VSUP_SM_4
Dependency on Device configuration None
Initialization
Protection enable and threshold programming on selected power rails in Power control
register
Periodicity Continuous
Test for the diagnostic Not applicable
Multiple-fault protection CPU_SM_5: External watchdog
Recommendations and known limitations
This method can be used in conjunction with VSUP_SM_0 to implement a complete
supervision of VDD value
Table 39. VSUP_SM_5
SM CODE VSUP_SM_5
Description System-level power supply management
Ownership End user
Detailed implementation
This method is implemented at system level in order to guarantee the stability of power supply
value over time. It can include a combination of different overlapped solutions, some listed
here below (but not limited to):
• additional voltage monitoring by external components
• passive electronics devices able to mitigate overvoltage
• specific design of power regulator in order to avoid power supply disturbance in
presence of a single failure
Error reporting Depends on implementation
Fault detection time Fault avoidance
Addressed fault model None
Dependency on Device configuration None
Initialization Depends on implementation
Periodicity Continuous
Test for the diagnostic Not applicable
Multiple-fault protection Not applicable
Recommendations and known limitations
Usually, this method is already required/implemented to guarantee the stability of each
component of the final electronic board.
3.6.7 Reset and clock controller (RCC)
Table 40. CLK_SM_0
SM CODE CLK_SM_0
Description Periodic read-back of configuration registers
Ownership End user
Detailed implementation
This method must be applied to configuration registers for clock and reset system (refer to
RCC register map).
Detailed information on the implementation of this method can be found in
Section 3.6.14 Extended interrupt and events controller (EXTI).
Error reporting Refer to NVIC_SM_0
Fault detection time Refer to NVIC_SM_0
Addressed fault model Refer to NVIC_SM_0
UM2305
Hardware and software diagnostics
UM2305 - Rev 10
page 29/110
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