Note:
The above-described safety mechanism addresses the LTDC interface included in STM32 MCUs. Because
actual capability of correct image generation on LTDC is not addressed by this safety mechanism, in case such
feature is considered safety relevant, End user is warned to evaluate the adoption of adequate system-level
measures.
3.6.26
DSI Host (DSI)
Table 95.
DSI_SM_0
SM CODE
DSI_SM_0
Description
Periodic read-back of DSI configuration registers
Ownership
End user
Detailed implementation
This method must be applied to DSI 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 96.
DSI_SM_1
SM CODE
DSI_SM_1
Description
Protocol error signals and information redundancy including hardware checksums
Ownership
ST
Detailed implementation
DSI communication/command protocol is based on a packet handling concept, including
(where applicable) ECC and checksum capabilities. This mechanism, mainly implemented to
manage on field communication disturbance, is able to achieve a relevant diagnostic coverage
on several DSI module failure modes.
Error reporting
Error conditions are reported by flag bits in related registers.
Fault detection time
Depends on peripheral configuration and the type of violation detected. Refer to functional
documentation.
Addressed fault model
Permanent/transient
Dependency on
Device
configuration
None
Initialization
Depends on implementation
Periodicity
Continuous
Test for the diagnostic
Not applicable
Multiple-fault protection
DSI_SM_0: Periodic read-back of DSI configuration registers
Recommendations and known limitations
None
UM2305
Hardware and software diagnostics
UM2305
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Rev 10
page 56/110
