Shutting down the Cortex M4 core on the iMX7d processor

cancel
Showing results for 
Search instead for 
Did you mean: 

Shutting down the Cortex M4 core on the iMX7d processor

104 Views
Contributor I

Our device is currently not utilizing the Cortex M4 core on the i.MX7d processor. Is there any means (GPIO, SMBus,etc.) to power off the Cortex M4 core?

Labels (1)
Tags (2)
2 Replies

4 Views
Senior Contributor II

Hi Cameron Napolitano,

As mentioned in the i.MX7D RM section 4.2.5 Cortex-M4 Boot requirement, Cortex-A7 is responsible for enabling and providing clock to Cortex-M4, please see the image below:

Screenshot from 2020-01-22 12-23-35.png

Taking clue from the last point, using the SRC_M4RCR(M4 Reset Control Register) register's 3rd bit (ENABLE_M4) we can enable/disable M4.

Regards,

Karan Gajjar

4 Views
NXP TechSupport
NXP TechSupport

good!