SM CODE SDIO_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 140. SDIO_SM_1
SM CODE SDIO_SM_1
Description Protocol error signals including hardware CRC
Ownership ST
Detailed implementation
SDIO/SMMC communication module embeds protocol error checks (like overrun, underrun,
timeout etc.) and CRC-packet checks as well, conceived to detect network-related abnormal
conditions. These mechanisms are able anyway to detect a percentage of hardware random
failures affecting the module itself
Error reporting Error flag raise and optional interrupt event generation
Fault detection time
Depends on peripheral configuration (for example baud rate). 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 SDIO_SM_2: Information redundancy techniques on messages
Recommendations and known limitations Enabling related interrupt generation on the detection of errors is highly recommended.
Table 141. SDIO_SM_2
SM CODE SDIO_SM_2
Description Information redundancy techniques on messages
Ownership End user
Detailed implementation
This method is implemented adding to data packets transferred by SDIO/SMMC a redundancy
check (like a CRC check, or similar one) with encoding capability. The checksum encoding
capability must be robust enough to guarantee at least 90% probability of detection for a
single bit flip in the data packet.
Consistency of data packet must be checked by Application software before consuming data.
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 On demand
Test for the diagnostic Not applicable
UM2305
Hardware and software diagnostics
UM2305 - Rev 10
page 78/110
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