When changing channel selections, the user
should observe the following guidelines to ensure that the correct channel is selected:
- In Single Conversion mode, always select the channel before starting the conversion.
The channel selection may be changed one ADC clock cycle after writing one to ADSC.
However, the simplest method is to wait for the conversion to complete before
changing the channel selection.
- In Free Running mode, always select
the channel before starting the first conversion. The channel selection may be
changed one ADC clock cycle after writing one to ADSC. However, the simplest method
is to wait for the first conversion to complete, and then change the channel
selection. Since the next conversion has already started automatically, the next
result will reflect the previous channel selection. Subsequent conversions will
reflect the new channel selection. The user is advised not to write new channel or
reference selection values during Free Running mode.