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After using LPRUN mode to display a clock on an LCD, returning to normal mode crashes.

Question asked by BRIAN PATERSON on Dec 10, 2014
Latest reply on Dec 11, 2014 by BRIAN PATERSON

During normal mode, it displays. All is well. We go to LPRUN mode to save power and only show a clock on the LCD

During LPRUN, the clock displays but on exiting back to normal mode, the DCU gives an under-run error condition. LCD goes black, system crashes.

System clock during LPRUN is set to 24MHz. Almost all peripherals are disabled.


Any thoughts?