Could someone tell me the function of the pin DCDC_IN_Q or point me to a reference that describes it?
Thanks!
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Hello matt0x000C,
Would you please let us know which i.MXRT MCU are you using?
The DCDC_IN_Q would be the analog power supply used by some analog modules of DCDC. It should have the same source as DCDC_IN, but is split from DCDC_IN to make it more resilient to noise.
In summary, it should be handled the same way as DCDC_IN. The i.MXRT1170 documentation is clearer on this pin, while the i.MXRT1060 documentation for example just list it as part of the DCDC_IN.
You may find more details on how to handle this power supply on the Hardware Design Guide for the i.MXRT you are using (link below for the i.MXRT1050/1060 version, please note that you may need to login to download this document).
https://www.nxp.com/webapp/Download?colCode=MIMXRT105060HDUG
I hope that this information helps!
Regards,
Gustavo
Hello matt0x000C,
Would you please let us know which i.MXRT MCU are you using?
The DCDC_IN_Q would be the analog power supply used by some analog modules of DCDC. It should have the same source as DCDC_IN, but is split from DCDC_IN to make it more resilient to noise.
In summary, it should be handled the same way as DCDC_IN. The i.MXRT1170 documentation is clearer on this pin, while the i.MXRT1060 documentation for example just list it as part of the DCDC_IN.
You may find more details on how to handle this power supply on the Hardware Design Guide for the i.MXRT you are using (link below for the i.MXRT1050/1060 version, please note that you may need to login to download this document).
https://www.nxp.com/webapp/Download?colCode=MIMXRT105060HDUG
I hope that this information helps!
Regards,
Gustavo
Hi Gustavo,
Thanks for the explanation! I'm using the i.MXRT1062, but I don't see any references in the HDG specifically about the DCDC_IN_Q pin.
I noticed on the EVK, it was connected to DCDC_IN, but I didn't want to make any assumptions.
Thanks!
Matt
Hello matt0x000C,
I agree that It’s better not to make assumptions when working with a new MCU, my apologies for the confusion as on the i.MXRT1060 documentation there is no much information on the DCDC_IN_Q pin in particular, but please proceed to handle it like the other DCDC_IN pins.
Regards,
Gustavo