Analog/digital converter (ADC) UM0306
458/519
Example:
n = 3, channels to be converted = 0, 1, 2, 3, 6, 7, 9, 10
1st trigger: sequence converted 0, 1, 2
2nd trigger: sequence converted 3, 6, 7
3rd trigger: sequence converted 9, 10 and an EOC event generated
4th trigger: sequence converted 0, 1, 2
Note: When a regular group is converted in discontinuous mode, no rollover will occur.
When all sub groups are converted, the next trigger starts conversion of the first sub-group.
In the example above, the 4th trigger reconverts the 1st sub-group channels 0, 1 and 2.
Injected group
This mode is enabled by setting the JDISCEN bit in the ADC_CR1 register. It can be used to
convert the sequence selected in the ADC_JSQR register, channel by channel, after an
external trigger event.
When an external trigger occurs, it starts the next channel conversions selected in the
ADC_JSQR registers until all the conversions in the sequence are done. The total sequence
length is defined by the JL[1:0] bits in the ADC_JSQR register.
Example:
n = 1, channels to be converted = 1, 2, 3
1st trigger: channel 1 converted
2nd trigger: channel 2 converted
3rd trigger: channel 3 converted and EOC and JEOC events generated
4th trigger: channel 1
Note: 1 When all injected channels are converted, the next trigger starts the conversion of the first
injected channel. In the example above, the 4th trigger reconverts the 1st injected channel
1.
2 It is not possible to use both auto-injected and discontinuous modes simultaneously.
3 The user must avoid setting discontinuous mode for both regular and injected groups
together. Discontinuous mode must be enabled only for one group conversion.
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