SM CODE DCMI_SM_1
Multiple-fault protection DCMI_SM_0: Periodic read-back of DCMI configuration registers
Recommendations and known limitations
(*) For its nature, the detection of an actual hardware failure by this safety mechanism can be
confused with functional-related scenarios (e.g. camera device disconnected or powered-off).
It is responsibility of Application software to discriminate, as far as it is technically possible,
among different events.
3.6.25 LCD-TFT display controller (LTDC)
Table 93. LCD_SM_0
SM CODE LCD_SM_0
Description Periodic read-back of LTDC configuration registers and buffer memory
Ownership End user
Detailed implementation
This method must be applied to LTDC configuration registers and to the buffer memory.
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 94. LCD_SM_1
SM CODE LCD_SM_1
Description LTDC acquisition by ADC channel
Ownership End user
Detailed implementation
Correct generation of LTDC driving signals is checked by ADC reading versus expected
values
Error reporting Depends on implementation
Fault detection time Depends on implementation
Addressed fault model Permanent
Dependency on Device configuration None
Initialization None
Periodicity Periodic
Test for the diagnostic Not applicable
Multiple-fault protection CPU_SM_0: Periodic core self-test software
Recommendations and known limitations
This method is conceived to mainly detect permanent failures affecting analog parts and
therefore the execution on periodic way is acceptable. Diagnostic coverage achievable
depends on the quantity of LTDC signals checked
UM2305
Hardware and software diagnostics
UM2305 - Rev 10
page 55/110
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