topic MCXA153VLH ADC0 TRIGGER in MCX Microcontrollers

MCXA153VLH ADC trigger

_Ferrari_ — Wed, 20 Aug 2025 07:49:43 GMT

I am developing a project based on the MCXA153VLH microprocessor and I need to sample an analog signal at regular time intervals.

I thought about using a timer to act as a trigger to start the conversion. At the end of the conversion, the analog-to-digital converter should generate an interrupt to signal the end of the conversion and the availability of the data to be converted.

I have already used a similar technique with the LPC5526 microprocessor with excellent results. In that project, I used timer 4, associating the start of the conversion with trigger 9.

Unfortunately, I cannot find which trigger number is associated with a timer that starts the AD conversion on the MCXA153VLH microprocessor.

Could you provide me with detailed information?

Thank you and have a good day.

Re: MCXA153VLH ADC trigger

Alice_Yang — Thu, 21 Aug 2025 10:30:15 GMT

Hello @_Ferrari_

There is also a timer-triggered ADC on the MCXA153; please refer to it.

MCXA153 RM ->

13.5.1.11 ADC Trigger input connections (ADC0_TRIG0 - ADC0_TRIG3)

Alice

MCXA153VLH ADC trigger

_Ferrari_ — Thu, 21 Aug 2025 12:18:38 GMT

Thank you very much for your answer.

Just another question: what is the correct number to put in the ADC trigger configuration

to have CTimer0_MAT0 as ADC input trigger ?

Thank you for your help and cooperation,

regards

Re: MCXA153VLH ADC trigger

Alice_Yang — Fri, 22 Aug 2025 03:43:48 GMT

Hello @_Ferrari_

The MCXA153 features four ADC trigger input registers, namely ADC0_TRIG0 to ADC0_TRIG3. You can utilize any one of these registers, meaning you can input values 0, 1, 2, or 3.

Thank you.

Alice

MCXA153VLH ADC0 TRIGGER

_Ferrari_ — Fri, 22 Aug 2025 13:19:27 GMT

Thank you for your answer!

I need to write a number from zero to 3, which identifies one of the registers:
0 for ADC0_TRIG0
1 for ADC0_TRIG1
2 for ADC0_TRIG2
3 for ADC0_TRIG3

If I've understood correctly, into one of these registers, for example ADC0_TRIG0, I need to write the TRIGIN data, which should be 00_1001b (CTimer0_MAT0 input is selected).

I can't figure out how to write the 00_1001b data into the ADC0_TRIG0 register using the Peripherals tool in MCUXpresso IDE.

Could you please explain how to do it?
Thanks, and have a good day.

Re: MCXA153VLH ADC0 TRIGGER

Alice_Yang — Wed, 27 Aug 2025 10:05:54 GMT

Hello @_Ferrari_

Detail steps please refer to:

https://community.nxp.com/t5/MCUXpresso-Config-Tools/LPC553x-configure-ADC-hardware-trigger-sources/m-p/1731393#M1731

Alice