3.6.9 Inter-integrated circuit (I2C) 1/2
Table 44. IIC_SM_0
SM CODE IIC_SM_0
Description Periodical read-back of configuration registers
Ownership End user
Detailed implementation
This method must be applied to I2C configuration registers.
Detailed information on the implementation of this method can be found in Section 3.6.5
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 MCU 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 faults protection Refer to NVIC_SM_0
Recommendations and known limitations Refer to NVIC_SM_0
Table 45. IIC_SM_1
SM CODE IIC_SM_1
Description Protocol error signals
Ownership ST
Detailed implementation
I2C communication module embeds protocol error checks (like overrun, underrun, packet error etc.)
conceived to detect network-related abnormal conditions. These mechanisms are able anyway to
detect a marginal 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 (e.g. baud rate), refer to functional documentation
Addressed fault model Permanent and Transient
Dependency on MCU configuration None
Initialization Depends on implementation
Periodicity Continuous
Test for the diagnostic Not needed
Multiple faults protection IIC_SM_2: Information redundancy techniques on messages
Recommendations and known limitations
Adoption of SMBus option grants the activation of more efficient protocol-level hardware checks like
CRC-8 packet protection
Table 46. IIC_SM_2
SM CODE IIC_SM_2
Description Information redundancy techniques on messages
Ownership End user
UM1845
Description of hardware and software diagnostics
UM1845 - Rev 4
page 36/108
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