ST STM32F2 Series User Manual page 66

SM CODE
Detailed implementation
Error reporting
Fault detection time
Addressed fault model
Dependency on MCU configuration
Initialization
Periodicity
Test for the diagnostic
Multiple faults protection
Recommendations and known limitations
Note: The use of the DMA feature inside Ethernet module brings to adopt the same set of safety mechanism defined
for the system DMA (refer to Direct memory access controller (DMA)).
UM1845 - Rev 4
ETH_SM_2
This method aim to protect the communication between a peripheral and its external counterpart. It
is used in Ethernet local safety concept to address failures not detected by ETH_SM_1 and to
increase its associated diagnostic coverage.
Refer to CAN_SM_2 description for detailed information.
Depends on implementation
Depends on implementation
Permanent and transient
None
Depends on implementation
On demand
Not needed
CPU_SM_0: periodical core self test software
The implementation on the application software of complex Ethernet-based communication stacks
(like TCP/IP) is able to satisfy the requirements of this method.
Description of hardware and software diagnostics
UM1845
page 66/108