We are using iMX7S processor in wearable medical device development were power consumption is primary factor.
Our use case is M4 is always in RUN mode and A7 in STOP mode. Whenever I need to do some processing on A7, M4 sends weak-up request to A7, A7 do some processing and go in to STOP mode again.
To check iMX7S power consumption I am measuring current on VDD_ARM and VDD_SOC power rail.
Current mA VDD_SOC
Current mA VDD_ARM
As you see from this table. If I put A7 in STOP mode, VDD_SOC current is almost same while VDD_ARM current is decrease.
So the power consumption of iMX7S in A7 in STOP mode and M4 in RUN mode is around 180mW.
So how to reduce power consumption when A7 is in STOP mode and M4 is in RUN mode?