SM CODE SAI_SM_2
Ownership End user
Detailed implementation
This safety mechanism is implemented using the two SAI interfaces to decode/receive the same
input stream audio. The application software checks the coherence between the received data
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 CPU_SM_0: Periodical core self test software
Recommendations and known limitations
The MCU performance overload and the implementation complexity associated to this method can
be relevant.
Method to be used when SAI interface safety-related use is “audio stream receive”
UM1845
Description of hardware and software diagnostics
UM1845 - Rev 4
page 70/108
To Next Page