In creating a functional Safety Element out of Context (SEooC) concept and doing the functional safety analysis, TI generates a series of assumptions on system level design, functional safety concept, and requirements. These assumptions (sometimes called Assumptions of Use) are listed below. Additional assumptions about the detailed implementation of safety mechanisms are separately located in
Section 6.3.
The Functional Safety Analysis was done under the following system assumptions:
- SA_1: The system integrator shall follow all requirements in the component data sheet
- SA_2: The system integrator shall not exceed recommended operating conditions in the component data sheet
- SA_3: The system integrator uses SPI control, Pin 7 is either high-Z for 3.3 V I/O or pulled up to processor I/O voltage rail if 5 V for I/O is needed.
- SA_4: Typical applications as shown in Figure 4-3 .
- SA_5: The non-SPI communication control function is not used in the SEooC and is considered non-safety related.
Note: For functional safety applications, SPI communication control is to be used.
During integration activities these assumptions of use and integration guidelines described for this component shall be considered. Use caution if one of the above functional safety assumptions on this component cannot be met, as some identified gaps may be unresolvable at the system level.