Hello. NXP Team
How to use the external channel of S32K3 ADC
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Hi @VaneB
I have a followup to this.
If my design DOES NOT have a MUX but I want to use only for example ADC1_X[0] to sensor1, ADC1_X[1] to sensor2 and ADC1_X[2] sensor 3, can i reuse the MA pins for other purpose like GPIO output pins to drive an LED?
My design is based on s32k344
Hi NPX Team,
Related with this topic, may you please confirm if is it possible to implement a SCH like the following diagram?
Many thanks for your support.
Thank you very much for your help.
Hi @Niuyanlin
Each ADC provides 3 external decode signals (MA) to be used to select 1 channel out of 8 in the external analog multiplexers, and there can be maximum 4 of such multiplexers to connect 32 external channels, it means that these 4 multiplexers sharing the same MA signals.
The ADC automatically sets the MA to control these external analog multiplexers, based on the current channel selected for conversion. Depending on the Mask Register bits, the corresponding “X” pin is sampled, and the result is stored in the matching location for the “MA” & “X” combination.
Since no external analog multiplexers have been designed on our development board, such an example has not been implemented.
According to your prompt, I can't find an example of using external channel ADC in RTD. If you have a corresponding routine, I hope you can send it to me. Thank you very much.
Hi @Niuyanlin
You can find examples of ADC implementation that may be useful to you in the RTD.
B.R.
VaneB