We have developed our own board using the i.MX RT1052 crossover MCU. When we apply 12V to our board, 3.3V reaches the MCU’s DCDC_IN pin and VDD_SNVS_IN pin, but 1.1V is not generated at the DCDC_LP pin. Also, we are unable to download firmware to the MCU. Why is this happening?
How can we generate 1.1V at the DCDC_LP pin?
we attached schematics and Boot configuration file.
you may need to add some LDO or DCDC. Please refer to i.MX RT1050 Evaluation Kit
Do you design a demo or for customer project
Hi @bhaveshtirex ,
Thanks for your interest in NXP MIMXRT series!
I reviewed your schematic and didn't find any major issues. However, it appears that your on-chip DC-DC isn't actually enabled, which is preventing the core from receiving power.
Please verify that the power-up sequence complies with the specifications in the datasheet, as well as the relevant section in the RM:
Best regards,
Gavin