ST SPC560P34 - Figure 452. Bi-Stable Coding Example; Table 413. Bi-Stable Coding

RM0046 Fault Collection Unit (FCU)
Doc ID 16912 Rev 5 775/936
Bi-Stable protocol
In this protocol during the Init and the Fault state, faulty state is indicated. In the
Normal/Alarm state, non-faulty state is indicated. Table 413 shows bi-stable encoding for
FCU[0].
Figure 452. Bi-stable coding example
Table 413. Bi-stable coding
Logical value Bi-stable encoding
faulty 0
non-faulty 1
Reset
Configuration phase Normal behavior Fault occurred
FCU[0]
During configuration phase
fake faults can be injected
so outputs may be different
Reset is asserted