Figure 126. Alternate + Regular Simultaneous; Figure 127. Case Of Trigger Occurring During Injected Conversion - ST STM32L4 5 Series Reference Manual

Analog-to-digital converters (ADC)
If a trigger occurs during an injected conversion that has interrupted a regular conversion,
the alternate trigger is served.
trigger is ignored because the associated alternate conversion is not complete).

Figure 127. Case of trigger occurring during injected conversion

Combined injected simultaneous plus interleaved
This mode is selected by programming bits DUAL[4:0]=00011
It is possible to interrupt an interleaved conversion with a simultaneous injected event.
In this case the interleaved conversion is interrupted immediately and the simultaneous
injected conversion starts. At the end of the injected sequence the interleaved conversion is
resumed. When the interleaved regular conversion resumes, the first regular conversion
which is performed is alway the master's one.
the behavior using an example.
Caution: In this mode, it is mandatory to use the Common Data Register to read the regular data with
a single read access. On the contrary, master-slave data coherency is not guaranteed.
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Figure 126. Alternate + regular simultaneous

Figure 127
DocID024597 Rev 5
shows the behavior in this case (note that the 6th
Figure 128, Figure 129
RM0351
and Figure 130 show