UM0306 Analog/digital converter (ADC)
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Figure 179. Alternate trigger: 4 injected channels (each ADC) in discontinuous model
19.10.6 Independent mode
In this mode the dual ADC synchronization is bypassed and each ADC interfaces works
independently.
19.10.7 Combined regular/injected simultaneous mode
It is possible to interrupt simultaneous conversion of a regular group to start simultaneous
conversion of an injected group.
19.10.8 Combined regular simultaneous + alternate trigger mode
It is possible to interrupt regular group simultaneous conversion to start alternate trigger
conversion of an injected group. Figure 180 shows the behavior of an alternate trigger
interrupting a regular simultaneous conversion.
The injected alternate conversion is immediately started after the injected event arrives. If
regular conversion is already running, in order to ensure synchronization after the injected
conversion, the regular conversion of both (master/slave) ADCs is stopped and resumed
synchronously at the end of the injected conversion.
Figure 180. Alternate + Regular simultaneous
If a trigger occurs during an injected conversion that has interrupted a regular conversion, it
will be ignored. Figure 181 shows the behavior in this case (2nd trig is ignored).
ADC1
ADC2
1st trigger
Conversion
Sampling
2nd trigger
3rd trigger
4th trigger
5th trigger
6th trigger
7th trigger
8th trigger
JEOC on ADC2
JEOC on ADC1
ADC1 reg
CH0 CH1 CH2
CH0
CH2 CH3
CH0
ADC1 inj
ADC2 reg
ADC2 inj
1st trig
2nd trig
synchro not lost
CH3 CH5 CH6 CH6 CH7
CH3 CH4
CH7 CH8
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