ST STM32F2 Series - Page 4

IEC 61508 requirement (part 2 annex D) Reference
D2.2 a) the failure modes of the compliant item due to random hardware failures, that result in a failure of
the function and that are not detected by diagnostics internal to the compliant item;
Conditions of use
D2.2 b) for every failure mode in a), an estimated failure rate;
D2.2 c) the failure modes of the compliant item due to random hardware failures, that result in a failure of
the function and that are detected by diagnostics internal to the compliant item;
D2.2 d) the failure modes of the diagnostics, internal to the compliant item due to random hardware
failures, that result in a failure of the diagnostics to detect failures of the function;
D2.2 e) for every failure mode in c) and d), the estimated failure rate;
D2.2 f) for every failure mode in c) that is detected by diagnostics internal to the compliant item, the
diagnostic test interval;
Section 3.2.2
D2.2 g) for every failure mode in c) the outputs of the compliant item initiated by the internal diagnostics; Section 3.6
D2.2 h) any periodic proof test and/or maintenance requirements;
Conditions of use
D2.2 i) for those failure modes, in respect of a specified function, that are capable of being detected by
external diagnostics, sufficient information must be provided to facilitate the development of an external
diagnostics capability.
D2.2 j) the hardware fault tolerance;
Section 3
D2.2 k) the classification as type A or type B of that part of the compliant item that provides the function
(see 7.4.4.1.2 and 7.4.4.1.3);
The safe failure fraction reported in this manual has been computed under the assumptions described in this
document and especially according to the conditions of use described in Conditions of use.
UM1845
Reference normative
UM1845 - Rev 4
page 4/108