Luke Shi

9S12XEP256 Stop mode power consumption

Discussion created by Luke Shi on Sep 14, 2012
Latest reply on Sep 20, 2012 by Gordon S Doughman

Dear Sir Or Madam,


I have a project that uses MC9S12XEP256. The system could goes to STOP mode. Based on the specification at STOP mode the MC9S12X power consumption is less than 100uA at 3.3V. However, the actual measurement is around 800uA in my system. I am pretty sure that all un-used serail interfaces, and I/Os are truned off. But few interrupts are still enabled that were used to wake up the system. The system runs at 96MHz clock.


Please help to point out where the problem is and how I can make the system to consume less power in STOP mode. Your help is really appreciated.


Best Regards,