Analog-to-digital converters (ADC) RM0440
676/2126 RM0440 Rev 4
If the injected discontinuous mode is enabled for both master and slave ADCs:
• When the 1st trigger occurs, the first injected channel of the master ADC is converted.
• When the 2nd trigger occurs, the first injected channel of the slave ADC is converted.
• And so on.
A JEOS interrupt, if enabled, is generated after all injected channels of the master ADC in
the group have been converted.
A JEOS interrupt, if enabled, is generated after all injected channels of the slave ADC in the
group have been converted.
JEOC interrupts, if enabled, can also be generated after each injected conversions.
If another external trigger occurs after all injected channels in the group have been
converted then the alternate trigger process restarts.
Figure 144. Alternate trigger: 4 injected channels (each ADC) in discontinuous mode
Combined regular/injected simultaneous mode
This mode is selected by programming bits DUAL[4:0] = 00001.
It is possible to interrupt the simultaneous conversion of a regular group to start the
simultaneous conversion of an injected group.
Note: In combined regular/injected simultaneous mode, one must convert sequences with the
same length or ensure that the interval between triggers is longer than the long conversion
time of the 2 sequences. Otherwise, the ADC with the shortest sequence may restart while
the ADC with the longest sequence is completing the previous conversions.
Combined regular simultaneous + alternate trigger mode
This mode is selected by programming bits DUAL[4:0]=00010.
It is possible to interrupt the simultaneous conversion of a regular group to start the alternate
trigger conversion of an injected group. Figure 145 shows the behavior of an alternate
trigger interrupting a simultaneous regular conversion.
The injected alternate conversion is immediately started after the injected event. If a regular
conversion is already running, in order to ensure synchronization after the injected
conversion, the regular conversion of all (master/slave) ADCs is stopped and resumed
synchronously at the end of the injected conversion.
1st trigger
2nd trigger
3rd trigger
4th trigger
5th trigger
6th trigger
7th trigger
8th trigger
JEOC, JEOS on
master ADC
ai16060V2-m
MASTER ADC
SLAVE ADC
JEOC on
master ADC
JEOC, JEOS on
master ADC
JEOC on
master ADC
JEOC on
master ADC
JEOC on
master ADC
JEOC on
master ADC
JEOC on
master ADC
Sampling
Conversion
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