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m54455evb RTC data lost

Question asked by Guillermo Sanchez on May 9, 2011
Latest reply on May 19, 2011 by Guillermo Sanchez

Hello all:

 

I'm working with a MCF54455EVB, MQX3.7 and CW 10.1 for MCUs.

 

Right now we are testing our own board that is mostly equal to the former EVB but has a MCF54452 MCU. We have created a hardware circuit that keeps the voltage to 1.6v in VDD_RTC while the board is off. Now, we seem incapable to maintain the data and time stored after a reset or power down. We don't really know if the MCU is designed to store the time while that specific pin has voltage. Anybody can confirm this?

 

By the way, we have tested the RTC VDD circuit.

 

Thanks.

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