A question about ADC Sampling time in MPC5643L.

[jungwoojin]

HI.

I use  MPC5643L.

this device includes two ADC modules, referred to as ADC_0, and ADC_1.

and it has 9 external channels each ( ex. ADC_0 channel0 ~ ADC_0 channel8)

I know I can set ADC sampling time for each ADC module.

Nevertheless, Can I set ADC sampling time differently for each external channel?

[PetrS · Accepted solution]

Hi,

more likely not. There is single CTR register for all external channels. So if you want to have different conversion time for each channel you need to reconfigure it before start of new channel conversion.

BR, Petr

[jungwoojin]

Thanks for the reply.

I am using CTU to do all external channel's conversion automatically.

This is declared in the initialization phase as follows:

so, I wonder how i can reconfigure CTR register before start of new channel(The specific channel I want) conversion.

[PetrS]

Hi,

those 5 channels are converted immediately after each other, controlled by CTU. There is no way to change conversion time between each. You can maybe do that in SW controlled conversion.

BR, Petr