Figure 42. Alternate Trigger: Injected Group Of Each Adc - ST STM32F207 Series Reference Manual

RM0033
ADC has to perform an injected conversion. It is resumed when the injected conversion is
finished.
If the conversion sequence is interrupted (for instance when DMA end of transfer occurs),
the multi-ADC sequencer must be reset by configuring it in independent mode first (bits
DUAL[4:0] = 00000) before reprogramming the interleaved mode.
The time interval between 2 trigger events must be greater than or equal to 1 ADC clock
period. The minimum time interval between 2 trigger events that start conversions on the
same ADC is the same as in the single ADC mode.
Dual ADC mode
• When the 1st trigger occurs, all injected ADC1 channels in the group are converted
•
When the 2nd trigger occurs, all injected ADC2 channels in the group are converted
• and so on
A JEOC interrupt, if enabled, is generated after all injected ADC1 channels in the group
have been converted.
A JEOC interrupt, if enabled, is generated after all injected ADC2 channels in the group
have been converted.
If another external trigger occurs after all injected channels in the group have been
converted then the alternate trigger process restarts by converting the injected ADC1
channels in the group.
1st trigger
ADC1
ADC2
2nd trigger
If the injected discontinuous mode is enabled for both ADC1 and ADC2:
•
When the 1st trigger occurs, the first injected ADC1 channel is converted.
•
When the 2nd trigger occurs, the first injected ADC2 channel are converted
•
and so on
A JEOC interrupt, if enabled, is generated after all injected ADC1 channels in the group
have been converted.
A JEOC interrupt, if enabled, is generated after all injected ADC2 channels in the group
have been converted.
If another external trigger occurs after all injected channels in the group have been
converted then the alternate trigger process restarts.

Figure 42. Alternate trigger: injected group of each ADC

3rd trigger
EOC, JEOC
on ADC1
EOC, JEOC
on ADC2
4th trigger
RM0033 Rev 9
Analog-to-digital converter (ADC)
(n)th trigger
EOC, JEOC
on ADC1
. . .
EOC, JEOC
on ADC2
(n+1)th trigger
Sampling
Conversion
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