questions to ADC in AT90CAN128

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#1
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Hello,

in some circuits there is a RC low pass filter on the ADC inputs. Does this LPF bring benefits to AT90CAN128?

According to the data sheet ADCL must be read first and then ADCH. Could I ensure this is fulfilled with “

adc_data = ADC

”?

Some initializations have to be made before any ADC operations, such as reference voltage, left adjust, adc channel, interrupt and prescaler. In my case I have to change the ADC channel all the time, that is, MUX4 to MUX0 have to be changed at run time. Do I have to initialize everything while changing ADC channels or can I only change MUX0 to MUX4?

Thanks

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Total votes: 0

Hi,
I suggest you should see 'Changing Channel or Reference Selection'&'ADC Input Channels' in its datasheet.
I am an beginner too,but I always think the datasheet must be able to help us how to use it.

BestRegards,
Morris