MSPM0C1104: Inquiry About Simultaneous Use of ADC Channels on MSPM0C1104DGS20

Hi DDdoor,

My apologies for the delay in my response.

There are only 4 MEMRES registers, which allows up to 4 channels to be measured at a time.  In order to measure 5 or more channels, after the first 4 channels are measured the software will have to reconfigure the next 4 channels before measurement is performed.

It depends on what you mean by " simultaneously". There is only one ADC, so you can only measure one channel at a time. The channels are multiplexed.

Thanks Keith - you are correct.  Bad choice of wording on my part.

I meant to say it is possible to use up to 4 ADC channels assigned to the 4 MEMRES registers and  measured in sequence. 

To measure 10 channels you first assign 4 ADC channels to the MEMRES register and perform the measurements, either one channel at a time or sequentially.  Then to measure the next 4 channels, assign 4 different ADC channels to the MEMRES registers and measure, then again reassign the last  2 ADC channels and measure.

Hello Dennis Lehman,

My question also refers to the ability to measure the analog signals input to each pin sequentially.
Since there are 10 analog-capable pins, I assumed it would be possible to configure all 10 in SysConfig.

However, when setting up a sequence in CCS, I confirmed that only 4 channels can be assigned at a time.

Given this, would it be possible for you to provide a sample design that allows for reconfiguring and measuring the next set of 4 channels?

Best regards,
DDdoor

Hi DDdoor,

Yes, the MSPM0C is limited to only 4 MEMRES.  Let me put together an example and I will share with you.

Hi DDdoor - my apologies for the delay.  Attached is a MSPM0C1104 project using all 10 channels.adc12_all_channels_measured_MSPM0C1104.zip

Excellent!