SM CODE
ADC_SM_4
Test for the diagnostic
Not applicable
Multiple-fault protection
ADC_SM_0: Periodic read-back of configuration registers
Recommendations and known limitations
This method can be used in conjunction with ADC_SM_0 / ADC_SM_2 / ADC_SM_3 to
achieve highest level of ADC module diagnostic coverage.
3.6.19
Digital-to-analog converter (DAC)
Table 77.
DAC_SM_0
SM CODE
DAC_SM_0
Description
Periodic read-back of configuration registers
Ownership
End user
Detailed implementation
This method must be applied to DAC configuration registers.
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
Dependency on
Device
configuration
Refer to NVIC_SM_0
Initialization
Refer to NVIC_SM_0
Periodicity
Refer to NVIC_SM_0
Test for the diagnostic
Refer to NVIC_SM_0
Multiple-fault protection
Refer to NVIC_SM_0
Recommendations and known limitations
Refer to NVIC_SM_0
Table 78.
DAC_SM_1
SM CODE
DAC_SM_1
Description
DAC output loopback on ADC channel
Ownership
End user
Detailed implementation
Route the active DAC output to one ADC channel, and check the output current value against
the expected one.
Error reporting
Depends on implementation
Fault detection time
Depends on implementation
Addressed fault model
Permanent/transient
Dependency on
Device
configuration
None
Initialization
Depends on implementation
Periodicity
Continuous or on demand
Test for the diagnostic
Not applicable
Multiple-fault protection
CPU_SM_0: Periodic core self-test software
Recommendations and known limitations
Efficiency versus transient failures is linked to final application characteristics. We define as
Tm the minimum duration of DAC wrong signal permanence required to violate the related
safety function(s). Efficiency is maximized when execution test frequency is higher than 1/Tm.
UM2305
Hardware and software diagnostics
UM2305
-
Rev 10
page 48/110
