Usb Hs/Fs; Table 54. Usb_Sm_0; Table 55. Usb_Sm_1; Table 56. Usb_Sm_2 - ST STM32F2 Series User Manual

3.6.11

USB HS/FS

SM CODE
Description
Ownership
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
SM CODE
Description
Ownership
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 None
SM CODE
Description
Ownership
UM1845 - Rev 4
Table 54. USB_SM_0
USB_SM_0
Periodical read-back of configuration registers
End user
This method must be applied to USB configuration registers.
Detailed information on the implementation of this method can be found in
Refer to NVIC_SM_0
Refer to NVIC_SM_0
Refer to NVIC_SM_0
Refer to NVIC_SM_0
Refer to NVIC_SM_0
Refer to NVIC_SM_0
Refer to NVIC_SM_0
Refer to NVIC_SM_0
Refer to NVIC_SM_0
Table 55. USB_SM_1
USB_SM_1
Protocol error signals
ST
USB communication module embeds protocol error checks (like overrun, underrun, NRZI, bit
stuffing 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 flag raise and optional Interrupt Event generation
Depends on peripheral configuration (e.g. baud rate), refer to functional documentation
Permanent and Transient
None
Depends on implementation
Continuous
Not needed
USB_SM_2: Information redundancy techniques on messages
Table 56. USB_SM_2
USB_SM_2
Information redundancy techniques on messages
ST or end user
Description of hardware and software diagnostics
UM1845
Section 3.6.5
page 42/108