Table 62. ADC_SM_4
SM CODE ADC_SM_4
Description 1oo2 scheme for ADC inputs
Ownership End user
Detailed implementation
This safety mechanism is implemented using two different SAR ADC channels to acquire the same
input signal. The application software checks the coherence between the two readings.
It is recommended to use two different ADC modules belonging to different ADC modules
Error reporting Depends on implementation
Fault detection time Depends on implementation
Addressed fault model Permanent and Transient
Dependency on MCU configuration None
Initialization Depends on implementation
Periodicity On demand
Test for the diagnostic Not needed
Multiple faults protection ADC_SM_0: Periodical read-back of ADC 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
UM1845
Description of hardware and software diagnostics
UM1845 - Rev 4
page 46/108
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